JP2001062594A - Alloy for pressurization molding die - Google Patents
Alloy for pressurization molding dieInfo
- Publication number
- JP2001062594A JP2001062594A JP23987699A JP23987699A JP2001062594A JP 2001062594 A JP2001062594 A JP 2001062594A JP 23987699 A JP23987699 A JP 23987699A JP 23987699 A JP23987699 A JP 23987699A JP 2001062594 A JP2001062594 A JP 2001062594A
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- weight
- die
- molding die
- range
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000956 alloy Substances 0.000 title claims abstract description 79
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 68
- 238000000465 moulding Methods 0.000 title claims abstract description 34
- 239000000843 powder Substances 0.000 claims abstract description 21
- 230000002378 acidificating effect Effects 0.000 claims abstract description 13
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 11
- 239000003518 caustics Substances 0.000 claims abstract description 10
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 8
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 8
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 7
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 5
- 239000002994 raw material Substances 0.000 claims description 20
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 238000000034 method Methods 0.000 claims 1
- 229910002061 Ni-Cr-Al alloy Inorganic materials 0.000 abstract description 36
- 230000007797 corrosion Effects 0.000 abstract description 28
- 238000005260 corrosion Methods 0.000 abstract description 28
- 239000004570 mortar (masonry) Substances 0.000 abstract description 10
- 229910052804 chromium Inorganic materials 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract 1
- 230000032683 aging Effects 0.000 description 20
- 239000000243 solution Substances 0.000 description 18
- 239000000463 material Substances 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 6
- 238000001556 precipitation Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- 229910001315 Tool steel Inorganic materials 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 238000005242 forging Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 229910018106 Ni—C Inorganic materials 0.000 description 3
- 101150019161 SKS2 gene Proteins 0.000 description 3
- 238000003483 aging Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Natural products OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/06—Platens or press rams
- B30B15/065—Press rams
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、酸性粉末などの腐
食性物質を含む原料物質を加圧成形する際の金型に好適
な加圧成形型用合金に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alloy for a pressing mold suitable for a metal mold when a raw material containing a corrosive substance such as an acidic powder is pressed.
【０００２】[0002]
【従来の技術】従来から、粉末や粒体などの原料物質を
圧縮して、医薬品、医薬部外品、化粧品、農薬、飼料、
食料などのタブレットを成形する場合、タブレット形状
に応じた貫通孔を有する臼と、この臼の貫通孔（臼孔）
内に挿入される下杵および上杵とを組合せた成形型が用
いられている。このような成形型を使用したタブレット
の成形機としては種々のものが知られている（特開昭 6
2-230500号公報、特開平5-318198号公報、同6-179098号
公報、同7-8540号公報、同9-122990号公報、同9-206998
号公報、同9-271996号公報など参照）。タブレットの成
形機では、まず下杵が挿入された臼内に粉末などの原料
物質を充填し、この原料物質を上杵で圧縮することによ
り、所望のタブレットが成形される。2. Description of the Related Art Conventionally, raw materials such as powders and granules are compressed to produce pharmaceuticals, quasi-drugs, cosmetics, pesticides, feeds,
When molding a tablet for food or the like, a die having a through hole according to the tablet shape, and a through hole (a die hole) of the die.
A molding die in which a lower punch and an upper punch inserted into the inside are combined is used. Various types of tablet molding machines using such a mold are known (Japanese Patent Application Laid-Open No.
2-230500, JP-A-5-318198, JP-A-6-79098, JP-A-7-8540, JP-A-9-122990, JP-A-9-206998
And 9-271996. In a tablet molding machine, first, a raw material such as powder is filled in a die into which a lower punch has been inserted, and the raw material is compressed by an upper punch to form a desired tablet.
【０００３】タブレット成形機などに用いられる杵や臼
などには、例えば特開平7-8540号公報に記載されている
ように、合金工具鋼（例えばＳＫＳ2 やＳＫＤ11など）
のような鉄基合金、あるいはＭｏやＷなどの化合物を主
体とする超硬合金などが従来から用いられている。しか
し、これら従来のタブレット成形用合金では、必ずしも
耐食性や強度の点で満足した特性が得られておらず、原
料物質の性質によっては杵や臼の寿命が大幅に低下する
というような問題が生じている。For example, as described in JP-A-7-8540, alloy tool steel (for example, SKS2 or SKD11) is used for punches and dies used for tablet molding machines and the like.
Iron-based alloys such as those described above, or cemented carbides mainly composed of compounds such as Mo and W have been used. However, these conventional alloys for tablet molding do not always provide satisfactory properties in terms of corrosion resistance and strength, and depending on the properties of the raw materials, there is a problem that the life of punches and dies is greatly reduced. ing.
【０００４】例えば、近年用途の多様化などに伴って、
酸性粉末のような腐食性の高い粉末などを加圧成形する
必要が生じてきている。このような酸性粉末の成形に従
来の合金工具鋼などからなるタブレット成形用の杵や臼
を用いた場合、杵や臼の表面が酸性粉末により早期に腐
食されてしまう。杵や臼の表面の腐食は、原料粉末の離
型性の低下要因となったり、さらには強度劣化などを招
くことになる。このようなことから、酸性粉末などの腐
食性の高い粉末を成形する場合には、杵や臼の寿命が大
幅に低下してしまう。[0004] For example, with the recent diversification of applications,
It has become necessary to pressurize highly corrosive powders such as acidic powders. When a punch or a die for tablet forming made of a conventional alloy tool steel or the like is used for forming such an acidic powder, the surface of the punch or the die is corroded early by the acidic powder. Corrosion of the surface of the pestle or die causes a reduction in the releasability of the raw material powder, and further causes a reduction in strength. For this reason, when molding a highly corrosive powder such as an acidic powder, the life of the punch and the die is significantly reduced.
【０００５】また、合金工具鋼などからなるタブレット
成形用の杵や臼の耐食性を向上させるために、クロムメ
ッキなどでコーティングすることも試みられているが、
コーティング層の剥離により十分な効果を得ることがで
きず、また離型性の低下なども問題になる。さらに、セ
ラミックス焼結体の使用も検討されているが、成形時の
圧力や撃力により破壊が起こり、実用化には至っていな
い。[0005] In order to improve the corrosion resistance of punches and dies for tablet forming made of alloy tool steel or the like, coating with chrome plating or the like has been attempted.
A sufficient effect cannot be obtained by peeling off the coating layer, and a problem such as a decrease in releasability is caused. Further, the use of ceramic sintered bodies is also being studied, but the ceramics are broken down by the pressure and impact force during molding, and have not been put to practical use.
【０００６】なお、耐食性に優れた熱間プレス金型とし
て、特開昭63-18031号公報に記載されている金型も提案
されている。この金型はＣｒ20〜50重量% 、Ａｌ 1.5〜
9重量% 、残部実質的にＮｉからなるものであり、温度
500〜 800℃、プレス圧 500〜 2000kg/cm2 での熱間プ
レスに対して高硬度を有し、座屈することなく使用寿命
が長いことが記載されている。またこの公報中には、Ｎ
ｉは耐食性を向上させる成分であることも記載されてい
る。As a hot press die having excellent corrosion resistance, a die described in Japanese Patent Application Laid-Open No. 63-18031 has been proposed. This mold contains 20-50% by weight of Cr and 1.5% of Al.
9% by weight, with the balance substantially consisting of Ni,
It describes that it has a high hardness to a hot press at 500 to 800 ° C. and a press pressure of 500 to 2000 kg / cm 2 and has a long service life without buckling. Also, in this publication, N
It is also described that i is a component that improves corrosion resistance.
【０００７】さらに、特開昭52-60217号公報、同 55-14
5142号公報、同 53-137767号公報、特開平1-127640号公
報などには、Ｎｉ−Ｃｒ−Ａｌ系合金からなる時計側や
装飾品などが記載されており、これらのＮｉ−Ｃｒ−Ａ
ｌ系合金は硬度が高く、かつ耐食性に優れていることが
記載されている。Further, Japanese Patent Application Laid-Open Nos. Sho 52-60217 and 55-14
JP-A-5142, JP-A-53-137767, JP-A-1-127640 and the like describe watch sides and decorative articles made of Ni-Cr-Al-based alloys, and these Ni-Cr-A
It is described that the 1-based alloy has high hardness and excellent corrosion resistance.
【０００８】[0008]
【発明が解決しようとする課題】上述したように、各種
タブレットの成形などに用いられる加圧成形用型の構成
材料としては、従来ＳＫＳ2 やＳＫＤ11などの合金工具
鋼が主に用いられてきたが、酸性粉末などの腐食性の高
い原料物質の成形に適用した場合には、型表面が腐食さ
れるなどして、型寿命を大幅に低下させてしまうという
ような問題が生じている。また、型表面へのコーティン
グ処理では、コーティング層の剥離や離型性の低下など
が問題になる。さらに、セラミックス焼結体は成形時の
圧力や撃力による破壊を招くことから、実用化には至っ
ていない。As described above, alloy tool steels such as SKS2 and SKD11 have been mainly used as constituent materials of pressure forming dies used for forming various tablets. However, when applied to molding of highly corrosive raw materials such as acidic powders, there is a problem that the mold surface is corroded and the mold life is greatly reduced. In addition, in the coating treatment on the mold surface, problems such as peeling of the coating layer and deterioration of the releasability become problems. Furthermore, ceramics sintered bodies are not practically used because they are broken by pressure and impact force during molding.
【０００９】本発明はこのような課題に対処するために
なされたもので、粉末などの加圧成形用型に求められる
強度を維持した上で、酸性粉末などの腐食性物質に対す
る耐食性の向上を図った加圧成形型用合金を提供するこ
とを目的としている。SUMMARY OF THE INVENTION The present invention has been made in order to address the above-described problems, and has been made to improve the corrosion resistance to corrosive substances such as acidic powders while maintaining the strength required for a pressure molding die such as powders. It is an object of the present invention to provide an intended alloy for a pressing mold.
【００１０】[0010]
【課題を解決するための手段】本発明の第１の加圧成形
型用合金は、請求項１に記載したように、Ｃｒを25〜60
重量% 、Ａｌを0.01〜10重量% の範囲で含み、残部が実
質的にＮｉからなることを特徴としている。なお、本明
細書において、「Ｘ〜Ｙ」とは「Ｘ以上Ｙ以下」を意味
するものである。According to a first aspect of the present invention, there is provided an alloy for a press forming die, wherein Cr is contained in an amount of 25 to 60 Cr.
%, And Al in the range of 0.01 to 10% by weight, with the balance substantially consisting of Ni. In this specification, “X to Y” means “X or more and Y or less”.
【００１１】本発明の第２の加圧成形型用合金は、請求
項２に記載したように、Ｃｒを25〜60重量% 、Ａｌを0.
01〜10重量% 、Ｓｉ、Ｃ、Ｍｇ、Ｍｎ、ＴｉおよびＢか
ら選ばれる少なくとも 1種の元素を 0.8重量% 以下の範
囲で含み、残部が実質的にＮｉからなることを特徴とし
ている。According to the second aspect of the present invention, there is provided a second alloy for a press forming die, wherein Cr is 25 to 60% by weight and Al is 0.1% by weight.
It is characterized in that it contains at least one element selected from Si, C, Mg, Mn, Ti and B in an amount of 0.8 to 10% by weight, and the balance substantially consists of Ni.
【００１２】本発明の加圧成形型用合金において、Ｃｒ
含有量は請求項３に記載したように30〜45重量% の範囲
であることが好ましく、またＡｌ含有量は請求項４に記
載したように 0.1〜 5重量% の範囲であることが好まし
い。[0012] In the alloy for a pressure forming die of the present invention, Cr
The content is preferably in the range of 30 to 45% by weight as described in claim 3, and the Al content is preferably in the range of 0.1 to 5% by weight as described in claim 4.
【００１３】また、本発明の第２の加圧成形型用合金に
おいて、第４の成分のうちＭｎ、Ｓｉ、Ｃ、Ｍｇなどは
脱酸剤として機能し、これらの含有量は請求項５に記載
したように 0.005〜 0.1重量% の範囲とすることが好ま
しい。また、Ｍｇ、Ｔｉ、Ｂなどは展延性改善成分とし
て機能し、これらの含有量は請求項６に記載したように
0.005〜 0.1重量% の範囲とすることが好ましい。[0013] In the second alloy for press forming dies of the present invention, Mn, Si, C, Mg and the like among the fourth components function as deoxidizers, and their contents are defined in claim 5. As described above, the content is preferably in the range of 0.005 to 0.1% by weight. Further, Mg, Ti, B, and the like function as a ductility improving component, and their contents are as described in claim 6.
It is preferably in the range of 0.005 to 0.1% by weight.
【００１４】本発明の加圧成形型用合金、すなわち加圧
成形型用Ｎｉ−Ｃｒ−Ａｌ系合金は、例えば請求項７に
記載したように、JIS Z 2244-1992 で規定するビッカー
ス硬さで 500Hv以上の硬度を有するものであり、このよ
うな高硬度に加えて耐食性に優れるものである。このよ
うなＮｉ−Ｃｒ−Ａｌ系合金は、請求項８に記載したよ
うに、例えば酸性粉末のような腐食性物質を含む原料物
質の加圧成形用型の形成材料として好適である。The alloy for press forming of the present invention, that is, the Ni-Cr-Al alloy for press forming, has a Vickers hardness specified in JIS Z 2244-1992 , for example, as described in claim 7. It has a hardness of 500 Hv or more, and is excellent in corrosion resistance in addition to such high hardness. As described in claim 8, such a Ni-Cr-Al-based alloy is suitable as a material for forming a pressure forming die for a raw material containing a corrosive substance such as an acidic powder.
【００１５】本発明の加圧成形型用合金は、高強度およ
び高硬度を有すると共に、耐食性に優れるものである。
すなわち、本質的に耐食性が良好なＮｉにＣｒやＡｌを
添加したＮｉ−Ｃｒ−Ａｌ系合金は、耐食性をより一層
向上させることができると共に、時効処理によりγ相、
α相、γ′相などが複合的に析出して高硬度化すること
ができる。The alloy for press forming dies of the present invention has high strength and high hardness and is excellent in corrosion resistance.
That is, the Ni-Cr-Al-based alloy in which Cr and Al are added to Ni, which has essentially good corrosion resistance, can further improve the corrosion resistance, and has a γ-phase,
The α phase, γ ′ phase, etc. can be precipitated in a complex manner to increase the hardness.
【００１６】このような本発明の加圧成形型用Ｎｉ−Ｃ
ｒ−Ａｌ系合金によれば、各種の原料物質を加圧成形す
る際に用いられる型、例えば杵や臼に求められる強度を
維持した上で、酸性粉末などの腐食性物質との接触に伴
う腐食の進行を大幅に抑制することができる。従って、
このようなＮｉ−Ｃｒ−Ａｌ系合金を用いることによっ
て、加圧成形用型の長寿命化を達成することが可能とな
る。[0016] Such Ni-C for a pressure forming die of the present invention.
According to the r-Al-based alloy, while maintaining the strength required for a mold used for press-molding various raw materials, for example, a punch and a die, it is accompanied by contact with a corrosive substance such as an acidic powder. The progress of corrosion can be greatly suppressed. Therefore,
By using such a Ni-Cr-Al-based alloy, it is possible to achieve a longer life of the pressure molding die.
【００１７】さらに、本発明の加圧成形型用Ｎｉ−Ｃｒ
−Ａｌ系合金は、溶体化処理後の切削加工性に優れるこ
とから、溶体化処理後のＮｉ−Ｃｒ−Ａｌ系合金素材に
加工を施した後、時効処理および所定寸法への仕上げ加
工を行うことによって、上述した高強度および高耐食性
という特性を安定して得た上で、型の製造コストの削減
および寸法精度の向上などを図ることができる。Further, the present invention relates to a Ni--Cr for press forming die.
-Since the Al-based alloy is excellent in the cutting workability after the solution treatment, after performing the working on the Ni-Cr-Al-based alloy material after the solution treatment, the aging treatment and the finishing to a predetermined size are performed. This makes it possible to stably obtain the above-mentioned characteristics of high strength and high corrosion resistance, reduce the manufacturing cost of the mold, improve the dimensional accuracy, and the like.
【００１８】[0018]
【発明の実施の形態】以下、本発明を実施するための形
態について説明する。Embodiments of the present invention will be described below.
【００１９】本発明の加圧成形型用合金は、Ｃｒを25〜
60重量% 、Ａｌを0.01〜10重量% の範囲で含み、残部が
実質的にＮｉからなるＮｉ−Ｃｒ−Ａｌ系合金からな
る。本発明の加圧成形型用Ｎｉ−Ｃｒ−Ａｌ系合金は、
さらにＳｉ、Ｃ、Ｍｇ、Ｍｎ、ＴｉおよびＢから選ばれ
る少なくとも 1種の元素を 0.8重量% 以下の範囲で含む
ことができる。なお、Ｎｉ−Ｃｒ−Ａｌ系合金は微量の
不可避不純物（Ｆｅ、Ｖ、Ｃｏ、Ｃｕ、Ｗ、Ｍｏ、Ｔ
ａ、Ｎｂ、Ｏ、Ｎなど）を、例えば 0.1重量% 以下の範
囲で含んでいてもよい。また、製造工程上ＳｉがＳｉＯ
2 として0.002%程度不可避に入ることがあるが、本発明
合金の特性に影響を与えるものではない。The alloy for a press forming die of the present invention contains Cr in an amount of 25 to 25%.
It is composed of a Ni-Cr-Al-based alloy containing 60% by weight and Al in the range of 0.01 to 10% by weight, and the balance substantially consisting of Ni. The Ni-Cr-Al-based alloy for a press mold of the present invention is:
Further, at least one element selected from Si, C, Mg, Mn, Ti and B can be contained in a range of 0.8% by weight or less. The Ni-Cr-Al-based alloy contains trace amounts of unavoidable impurities (Fe, V, Co, Cu, W, Mo, T
a, Nb, O, N, etc.) in a range of, for example, 0.1% by weight or less. Also, in the manufacturing process, Si is SiO
Although it may inevitably enter about 0.002% as 2 , it does not affect the properties of the alloy of the present invention.
【００２０】本発明の加圧成形型用Ｎｉ−Ｃｒ−Ａｌ系
合金は、Ｎｉを主成分とすることが好ましい。主成分と
してのＮｉは、靭性を高めると共に耐食性を付与するも
のであり、またＮｉ−Ｃｒ−Ａｌ系合金のγ相（母相）
を形成する成分である。The Ni--Cr--Al alloy for press forming of the present invention preferably contains Ni as a main component. Ni as a main component enhances toughness and imparts corrosion resistance. In addition, γ phase (matrix) of a Ni—Cr—Al alloy is used.
Is a component that forms
【００２１】ＣｒはＮｉと同様に耐食性が高く、Ｎｉ−
Ｃｒ−Ａｌ系合金ひいてはそれを用いた加圧成形型に優
れた耐食性を付与する成分である。また、Ｃｒは後に詳
述する時効処理によって、粒界反応に基づくα相の析出
を促進する成分である。適量のＣｒを含むＮｉ−Ｃｒ−
Ａｌ系合金においては、時効処理によりＣｒ基のα相が
析出する。Cr has high corrosion resistance like Ni, and Ni-
It is a component that imparts excellent corrosion resistance to a Cr-Al-based alloy and, finally, to a pressure mold using the same. Cr is a component that promotes the precipitation of the α phase based on the grain boundary reaction by the aging treatment described later in detail. Ni-Cr- containing an appropriate amount of Cr
In an Al-based alloy, an aging treatment precipitates a Cr-based α phase.
【００２２】このようなＣｒの含有量は25〜60重量% の
範囲とすることが好ましい。Ｃｒの含有量が25重量% 未
満であると、時効処理によるα相の析出量が不足し、十
分な強度や硬度が得られないおそれがある。一方、Ｃｒ
の含有量が60重量% を超えると、延性が低下して脆くな
る。Ｃｒの含有量は、α相をより安定して析出させるこ
とが可能な30〜45重量% の範囲とすることが好ましく、
さらには35〜43重量%の範囲とすることが望ましい。The content of such Cr is preferably in the range of 25 to 60% by weight. If the content of Cr is less than 25% by weight, the amount of the α phase precipitated by the aging treatment is insufficient, and sufficient strength and hardness may not be obtained. On the other hand, Cr
If the content exceeds 60% by weight, the ductility decreases and the material becomes brittle. The content of Cr is preferably in the range of 30 to 45% by weight which allows the α phase to be more stably precipitated,
More preferably, it is in the range of 35 to 43% by weight.
【００２３】Ａｌは、Ｎｉ−Ｃｒ−Ａｌ系合金ひいては
それを用いた加圧成形型の耐食性をさらに高めると共
に、Ｃｒとの複合添加により強度および硬度の向上に寄
与する成分である。すなわち、Ａｌは後に詳述する時効
処理によって、例えばα相とγ母相との間にγ′相（Ｎ
ｉ3 Ａｌなど）を析出させる成分である。Al is a component that further enhances the corrosion resistance of the Ni—Cr—Al-based alloy and the resulting press-molded die, and contributes to the improvement of the strength and hardness by the addition of a composite with Cr. That is, Al is, for example, subjected to an aging treatment described in detail later, for example, so that a γ ′ phase (N
i 3 Al).
【００２４】Ａｌは微粒添加で著しく時効硬化性を高め
るものであり、その含有量は0.01〜10重量% の範囲とす
ることが好ましい。Ａｌの含有量が0.01重量% 未満であ
ると、時効硬化による硬度や強度の向上効果を十分に得
ることができない。一方、Ａｌの含有量が10重量% を超
えると、後述する溶体化処理後の硬度が高くなりすぎ
て、切削加工性などが低下する。Ａｌの含有量は、より
安定して複合析出構造を得ることが可能な 0.1〜 5重量
% の範囲とすることが好ましく、さらには 1.5〜4.5重
量% の範囲とすることが望ましい。Al significantly enhances age hardening by adding fine particles, and its content is preferably in the range of 0.01 to 10% by weight. If the Al content is less than 0.01% by weight, the effect of improving hardness and strength by age hardening cannot be sufficiently obtained. On the other hand, if the Al content exceeds 10% by weight, the hardness after the solution treatment described later becomes too high, and the machinability and the like are reduced. The content of Al is 0.1 to 5% by weight, which makes it possible to obtain a composite precipitation structure more stably.
%, More preferably 1.5 to 4.5% by weight.
【００２５】上述したようなγ相、α相、γ′相による
複合析出構造（特に積層構造）を得ることによって、加
圧成形型用Ｎｉ−Ｃｒ−Ａｌ系合金に高硬度および高強
度を付与することができる。具体的には、本発明のＮｉ
−Ｃｒ−Ａｌ系合金の硬度は、時効処理後にJIS Z 2244
-1992 で規定するビッカース硬さで 500Hv以上とするこ
とができる。また、時効処理条件の制御などによって、
Ｎｉ−Ｃｒ−Ａｌ系合金の硬度はビッカース硬さで 680
Hv以上とすることも可能である。さらに、本発明の加圧
成形型用Ｎｉ−Ｃｒ−Ａｌ系合金は、Ｎｉ、Ｃｒおよび
Ａｌの基本成分に基づいて、良好な耐食性を有するもの
である。By obtaining a composite precipitation structure (particularly a laminated structure) of the γ-phase, α-phase and γ′-phase as described above, high hardness and high strength are imparted to the Ni—Cr—Al alloy for press forming dies. can do. Specifically, the Ni of the present invention
-The hardness of the Cr-Al alloy is determined by JIS Z 2244 after aging treatment.
Vickers hardness specified in -1992 can be 500Hv or more. In addition, by controlling aging conditions,
The hardness of Ni-Cr-Al alloy is 680 in Vickers hardness.
Hv or more is also possible. Furthermore, the Ni-Cr-Al alloy for press forming of the present invention has good corrosion resistance based on the basic components of Ni, Cr and Al.
【００２６】本発明の加圧成形型用Ｎｉ−Ｃｒ−Ａｌ系
合金は、上記した基本成分に加えて、Ｓｉ、Ｃ、Ｍｇ、
Ｍｎ、ＴｉおよびＢから選ばれる少なくとも 1種の元素
を 0.8重量% 以下の範囲で含有していてもよい。この場
合、上記した各元素に基づいてＮｉ−Ｃｒ−Ａｌ系合金
の各種特性の向上を図ることができる。The Ni—Cr—Al alloy for press forming of the present invention comprises, in addition to the above basic components, Si, C, Mg,
At least one element selected from Mn, Ti and B may be contained in a range of 0.8% by weight or less. In this case, various characteristics of the Ni-Cr-Al-based alloy can be improved based on each of the above elements.
【００２７】すなわち、上記した元素のうち、Ｍｎ、Ｓ
ｉ、Ｃ、Ｍｇなどは脱酸剤として機能する。脱酸剤の含
有量は 0.1重量% 以下とすることが好ましい。また、脱
酸剤としての機能を十分に得る上で、Ｎｉ−Ｃｒ−Ａｌ
系合金中に 0.005重量% 以上含有させることが好まし
い。また、Ｍｇ、Ｔｉ、Ｂなどは展延性向上成分として
機能し、その含有量は 0.1重量% 以下とすることが好ま
しい。また、展延性向上成分としての機能を十分に得る
上で、その含有量は 0.005重量% 以上とすることが好ま
しい。That is, among the above elements, Mn and S
i, C, Mg, etc. function as deoxidizing agents. The content of the deoxidizing agent is preferably set to 0.1% by weight or less. Further, in order to sufficiently obtain the function as a deoxidizing agent, Ni-Cr-Al
It is preferable to contain 0.005% by weight or more in the base alloy. Further, Mg, Ti, B and the like function as a ductility improving component, and the content thereof is preferably 0.1% by weight or less. In order to sufficiently obtain the function as a spreadability improving component, the content is preferably 0.005% by weight or more.
【００２８】上述したような高硬度および高耐食性を有
する本発明のＮｉ−Ｃｒ−Ａｌ系合金は、例えば各種の
原料物質をタブレットとする際に用いられる杵や臼、す
なわち加圧成形機の杵や臼の構成材料として好適であ
る。The Ni-Cr-Al-based alloy of the present invention having high hardness and high corrosion resistance as described above is used, for example, for punches and dies used for making various raw materials into tablets, that is, punches of a press forming machine. It is suitable as a constituent material for mortars and mills.
【００２９】図１は本発明の合金を使用した加圧成形型
を有する加圧成形機の一構成例を示す図である。同図に
示す加圧成形機１０において、１は上杵、２は下杵、３
は臼である。臼３は原料物質が充填される貫通孔（臼
孔）３ａを有している。FIG. 1 is a view showing an example of the configuration of a pressure molding machine having a pressure molding die using the alloy of the present invention. In the press forming machine 10 shown in the figure, 1 is an upper punch, 2 is a lower punch, 3
Is a mortar. The mortar 3 has a through hole (mortar hole) 3a into which the raw material is filled.
【００３０】杵１、２は、先端部（杵先）に原料物質と
接触する成形部１ａ、２ａをそれぞれ有しており、これ
ら成形部１ａ、２ａは臼孔３ａ内に挿入可能な形状とさ
れている。また、杵１、２の成形部１ａ、２ａと反対側
の端部には、それぞれ圧縮力が加えられる頭部１ｂ、２
ｂが設けられている。The punches 1 and 2 have forming portions 1a and 2a at their tips (punch tips) that come into contact with the raw material, respectively. These forming portions 1a and 2a have a shape that can be inserted into the die hole 3a. Have been. The heads 1b, 2 to which compressive force is applied are respectively applied to the ends of the punches 1, 2 on the opposite side to the molding portions 1a, 2a.
b is provided.
【００３１】このような杵１、２の少なくとも成形部１
ａ、２ａに、本発明の加圧成形型用Ｎｉ−Ｃｒ−Ａｌ系
合金が使用される。なお、図１は成形部１ａ、２ａおよ
び頭部１ｂ、２ｂを含む杵全体を、本発明のＮｉ−Ｃｒ
−Ａｌ系合金で形成した杵１、２を示している。また、
臼３についても、本発明のＮｉ−Ｃｒ−Ａｌ系合金で形
成してもよい。この際、臼孔３ａの内壁面を構成する部
分のみを、本発明のＮｉ−Ｃｒ−Ａｌ系合金を適用する
ことも可能である。At least the molded part 1 of such punches 1 and 2
The Ni-Cr-Al-based alloy for a press mold of the present invention is used for a and 2a. FIG. 1 shows the entire punch including the molded parts 1a and 2a and the heads 1b and 2b,
1 shows punches 1 and 2 formed of an Al alloy. Also,
The mortar 3 may also be formed of the Ni-Cr-Al-based alloy of the present invention. At this time, it is also possible to apply the Ni-Cr-Al-based alloy of the present invention only to the portion constituting the inner wall surface of the die hole 3a.
【００３２】臼３は、臼孔３ａが垂直方向に位置するよ
うに、臼座１１が装着されている。また、上杵１および
下杵２は、それぞれ上杵保持盤１２および下杵保持盤１
３によって、垂直方向に摺動自在に保持されている。The mortar 3 is mounted on the mortar 3 such that the mortar hole 3a is positioned vertically. The upper punch 1 and the lower punch 2 are respectively connected to an upper punch holding plate 12 and a lower punch holding plate 1.
3 slidably holds in the vertical direction.
【００３３】下杵２の成形部２ａは臼孔３ａ内に挿入さ
れており、この状態で下杵２の頭部２ｂは下杵ガイド１
４と接触している。この下杵２の成形部２ａと臼孔３ａ
とで構成された容器内に原料物質１５が充填される。原
料物質１５としては各種粉末、あるいは粒体、ゲル状
物、高粘度液体やこれらの混合物などが用いられる。The molding portion 2a of the lower punch 2 is inserted into the die hole 3a. In this state, the head 2b of the lower punch 2 is
4 is in contact. The forming part 2a of the lower punch 2 and the die hole 3a
The raw material 15 is filled in the container constituted by the above. As the raw material 15, various powders, granules, gels, high-viscosity liquids, and mixtures thereof are used.
【００３４】原料物質１５が充填された臼孔３ａ内に
は、上杵１の成形部１ａが挿入される。そして、上杵１
の頭部１ｂを加圧ガイド１６を介して加圧することによ
って、充填された原料物質１５を上下から圧縮してタブ
レットが成形される。なお、加圧成形機１０は図示を省
略した加圧手段を有しており、これにより加圧ガイド１
６に必要な圧力が加えられる。The molding 1a of the upper punch 1 is inserted into the die hole 3a filled with the raw material 15. And upper punch 1
Is pressurized through the pressurizing guide 16 to compress the filled raw material 15 from above and below to form a tablet. The press forming machine 10 has a pressurizing means (not shown).
The required pressure is applied to 6.
【００３５】本発明の加圧成形型用Ｎｉ−Ｃｒ−Ａｌ系
合金は、上記したような加圧成形機１０の加圧成形型、
すなわち杵１、２や臼３に求められる強度および硬度を
満足し、その上で良好な耐食性を有している。従って、
例えば酸性粉末のような腐食性物質を含む原料物質の加
圧成形に適用した場合においても、腐食性物質との接触
に伴う加圧成形型の腐食進行を大幅に抑えることができ
る。これは型表面の腐食に伴う離型性（例えば粉離れ）
の低下、さらには強度の低下などを抑制することを意味
する。従って、加圧成形型の長寿命化を達成することが
可能となる。The Ni—Cr—Al alloy for a press forming die of the present invention is obtained by using the press forming die of the press forming machine 10 described above.
That is, it satisfies the strength and hardness required for the punches 1, 2 and the mortar 3, and has good corrosion resistance. Therefore,
For example, even when the present invention is applied to pressure molding of a raw material containing a corrosive substance such as an acidic powder, it is possible to significantly suppress the progress of corrosion of the pressure mold due to contact with the corrosive substance. This is the releasability due to corrosion of the mold surface (for example, powder release)
, And further a decrease in strength. Therefore, it is possible to achieve a longer life of the pressing mold.
【００３６】さらに、本発明の加圧成形型用Ｎｉ−Ｃｒ
−Ａｌ系合金は、溶体化処理により良好な切削性を示す
ため、予め溶体化処理後におおよその型寸法まで粗加工
しておき、その後に時効処理および仕上げ加工を施すこ
とによって、加工コストの上昇を抑制することができ
る。従って、高硬度、高強度、高耐食性を有する加圧成
形型の低コスト化および高精度化を実現することができ
る。具体的な製造条件は以下のように設定することが好
ましい。Furthermore, the Ni-Cr for press molding of the present invention
-Since Al-based alloys show good machinability due to solution treatment, the machining cost is increased by performing rough processing in advance to approximate mold dimensions after solution treatment, and then performing aging treatment and finish processing. Can be suppressed. Therefore, it is possible to reduce the cost and the accuracy of the pressure mold having high hardness, high strength, and high corrosion resistance. It is preferable to set specific manufacturing conditions as follows.
【００３７】すなわち、まず上述した組成を有するＮｉ
−Ｃｒ−Ａｌ系合金を溶解および鋳造してインゴットと
した後、熱間鍛造や圧延などを施して、適当な大きさお
よび形状を有するＮｉ−Ｃｒ−Ａｌ系合金素材を作製す
る。溶解、鋳造、鍛造、圧延などは常法にしたがって実
施する。That is, first, Ni having the above-described composition
After melting and casting the Cr-Al-based alloy to form an ingot, hot forging or rolling is performed to produce a Ni-Cr-Al-based alloy material having an appropriate size and shape. Melting, casting, forging, rolling and the like are performed according to a conventional method.
【００３８】次に、上記したＮｉ−Ｃｒ−Ａｌ系合金素
材に溶体化処理を施す。溶体化処理時の加熱温度は1000
〜1350℃の範囲とすることが好ましい。加熱温度が1000
℃未満であると、溶体化域に達することができず、良好
な切削加工性などを得ることができないおそれがある。
一方、加熱温度が1350℃を超えると融点直下となり、部
分的に溶融・変形を起こす危険性がある。上記した温度
での保持時間（溶体化処理時間）は、特に限定されるも
のではないが、 1時間以上とすることが好ましい。ま
た、上記した温度からの急冷は、例えば油冷や水冷によ
り実施する。Next, a solution treatment is applied to the above-mentioned Ni-Cr-Al alloy material. Heating temperature during solution treatment is 1000
The temperature is preferably in the range of 1350 ° C. Heating temperature is 1000
If the temperature is lower than 0 ° C., the solution-hardened region cannot be reached, and good cutting workability or the like may not be obtained.
On the other hand, if the heating temperature exceeds 1350 ° C., the temperature becomes just below the melting point, and there is a risk of causing partial melting and deformation. The holding time (solution treatment time) at the above-mentioned temperature is not particularly limited, but is preferably 1 hour or more. The rapid cooling from the above temperature is performed by, for example, oil cooling or water cooling.
【００３９】溶体化処理を施したＮｉ−Ｃｒ−Ａｌ系合
金素材は、次いで所要の型寸法より若干大きい形状まで
粗加工される。この際の加工形状は、所要の型寸法より
少なくとも0.2%以上大きい形状、好ましくは1%程度大き
い形状とする。この時点では、Ｎｉ−Ｃｒ−Ａｌ系合金
素材は溶体化処理により良好な切削加工性、すなわち適
度な硬度を有しているため、作業性の低下などを招くこ
とがない。言い換えると、低コストで加工することがで
きる。The solution-treated Ni-Cr-Al-based alloy material is then roughly processed to a shape slightly larger than a required mold size. The processed shape at this time is a shape that is at least 0.2% or more larger than the required mold size, and preferably a shape that is larger by about 1%. At this point, the Ni-Cr-Al-based alloy material has good cutting workability by solution treatment, that is, appropriate hardness, and thus does not cause a decrease in workability or the like. In other words, it can be processed at low cost.
【００４０】次いで、上記した粗加工を施したＮｉ−Ｃ
ｒ−Ａｌ系合金材（加工材）に時効処理を施す。時効処
理の際の加熱温度は 500〜 950℃の範囲とすることが好
ましく、このような温度で 2〜 6時間保持した後、常温
まで徐冷する。時効処理の加熱温度が 500℃未満である
と、前述したα相やγ′相の析出量が不足し、Ｎｉ−Ｃ
ｒ−Ａｌ系合金材を十分に時効硬化させることができな
いおそれがある。一方、加熱温度が 950℃を超えると固
溶域に近くなり、α相やγ′相の析出量が少なくなり、
硬度が低下するおそれがある。時効処理温度は 550〜 7
00℃の範囲とすることがより好ましい。Next, the above-described rough-processed Ni-C
An aging treatment is performed on the r-Al-based alloy material (processed material). The heating temperature at the time of the aging treatment is preferably in the range of 500 to 950 ° C. After maintaining at such a temperature for 2 to 6 hours, the temperature is gradually cooled to room temperature. If the heating temperature of the aging treatment is lower than 500 ° C., the precipitation amount of the α phase and γ ′ phase described above becomes insufficient, and Ni-C
There is a possibility that the age hardening of the r-Al alloy material cannot be sufficiently performed. On the other hand, if the heating temperature exceeds 950 ° C, it approaches the solid solution zone, and the precipitation amount of α phase and γ 'phase decreases,
The hardness may decrease. Aging temperature is 550 ~ 7
More preferably, the temperature is in the range of 00 ° C.
【００４１】上述したような時効処理によって、本発明
のＮｉ−Ｃｒ−Ａｌ系合金の硬度はJIS Z 2244-1992 で
規定するビッカース硬さで 500Hv以上、さらには 680Hv
以上となる。そして、時効処理したＮｉ−Ｃｒ−Ａｌ系
合金材を所定の型寸法まで仕上げ加工することによっ
て、所要の加圧成形型が得られる。[0041] by aging as described above, the hardness of the Ni-Cr-Al alloy of the present invention is 500Hv or more in Vickers hardness defined in JIS Z 2244 -1,992, further 680Hv
That is all. Then, by subjecting the aging-treated Ni-Cr-Al-based alloy material to finish processing to a predetermined mold size, a required pressure forming mold is obtained.
【００４２】[0042]
【実施例】次に、本発明の具体的な実施例およびその評
価結果について述べる。Next, specific examples of the present invention and evaluation results thereof will be described.
【００４３】実施例１〜１４ 表１に組成を示す各合金試料（Ｎｉ−Ｃｒ−Ａｌ系合金
試料）を溶解および鋳造した後、熱間鍛造および熱間圧
延して直径35mmの丸棒とした。これら各Ｎｉ−Ｃｒ−Ａ
ｌ系合金素材を1200℃で 2時間保持した後に油冷して、
それぞれ溶体化処理を施した。溶体化処理後の各Ｎｉ−
Ｃｒ−Ａｌ系合金素材を切削鍛造加工した後、各時効処
理温度で 5時間保持した後に常温まで空冷した。Examples 1 to 14 Each alloy sample (Ni—Cr—Al alloy sample) having the composition shown in Table 1 was melted and cast, and then hot forged and hot rolled into a round bar having a diameter of 35 mm. . Each of these Ni-Cr-A
After holding the l-based alloy material at 1200 ° C for 2 hours,
Each was subjected to a solution treatment. Each Ni- after solution treatment
After cutting and forging the Cr-Al-based alloy material, the material was kept at each aging treatment temperature for 5 hours and then air-cooled to room temperature.
【００４４】溶体化処理後および時効処理後の各Ｎｉ−
Ｃｒ−Ａｌ系合金素材のそれぞれの硬度と時効処理温
度、各Ｎｉ−Ｃｒ−Ａｌ系合金の熱間加工性、圧延性
（溶体化処理材）、耐酸化性を表２に示す。なお、硬度
はビッカース硬さ測定機にて荷重1kgで測定した。ま
た、熱間加工性は上記熱間鍛造および熱間圧延に際し、
テストサンプル 5個について破壊したり、それ以降の加
工が不可能となるほどの大きなクラックが発生した数で
評価した。Each Ni- solution after solution treatment and aging treatment
Table 2 shows the hardness and aging treatment temperature of each Cr-Al alloy material, hot workability, rollability (solution treatment material), and oxidation resistance of each Ni-Cr-Al alloy. The hardness was measured with a Vickers hardness tester at a load of 1 kg. In addition, hot workability in the above hot forging and hot rolling,
Five test samples were evaluated based on the number of cracks that occurred such that the test samples were broken or further processing was impossible.
【００４５】溶体化材展延性は以下のようにして評価し
た。まず、熱間加工上りのサンプルから10×10×3mm 程
度の小片を切り出し、常温にて 2段階圧延機を使用して
圧下率 80%程度まで圧延した後、溶体化処理を行う。こ
のサンプルに対し90°曲げ試験を行い、サンプル 5個の
うちクラックが入ったり破壊の発生したサンプル数で溶
体化材展延性を評価した。耐酸化性は、大気中で時効熱
処理を行い、その際に発生した粒界酸化の進行の深さに
より評価した。なお、表２において、「無し」の記述
は、表面の酸化はあるが、観察された酸化層の厚さが測
定限界以下であることを意味する。The spreadability of the solution-treated material was evaluated as follows. First, a small piece of about 10 × 10 × 3 mm is cut out from the sample after hot working, rolled to a rolling reduction of about 80% at room temperature using a two-stage rolling mill, and then subjected to a solution treatment. This sample was subjected to a 90 ° bending test, and the spreadability of the solution-hardened material was evaluated based on the number of cracked or broken samples among the five samples. Oxidation resistance was evaluated by the aging heat treatment in the air and the depth of progress of grain boundary oxidation generated at that time. In Table 2, "None" means that although the surface is oxidized, the observed thickness of the oxidized layer is below the measurement limit.
【００４６】[0046]
【表１】 [Table 1]
【００４７】[0047]
【表２】 [Table 2]
【００４８】加圧成形型として使用するためには、ビッ
カース硬さで 300Hv以上（好ましくは 500Hv以上）が必
要とされるが、各実施例の合金はいずれも上記硬度を満
足するものであった。For use as a pressure mold, a Vickers hardness of 300 Hv or more (preferably 500 Hv or more) is required, but all of the alloys of the examples satisfy the above hardness. .
【００４９】この後、仕上げ研削および研磨を行った。
このようにして得た各試料を後述する特性評価に供し
た。なお、実施例１、実施例２、実施例３、実施例４、
実施例７では、時効処理温度を変更した複数の試料をそ
れぞれ作製し、これら各試料を後述する特性評価に供し
た。Thereafter, finish grinding and polishing were performed.
Each sample thus obtained was subjected to the characteristic evaluation described later. In addition, Example 1, Example 2, Example 3, Example 4,
In Example 7, a plurality of samples each having a different aging treatment temperature were produced, and each of the samples was subjected to a characteristic evaluation described later.
【００５０】比較例１〜９ 本発明の組成範囲外のＮｉ−Ｃｒ−Ａｌ系合金を用い
て、上記した実施例と同一条件で加工し、後述する特性
評価に供した。Comparative Examples 1 to 9 Using a Ni—Cr—Al-based alloy outside the composition range of the present invention, processing was performed under the same conditions as in the above-described examples, and the characteristics were evaluated as described below.
【００５１】比較例１０ 従来の合金工具鋼（ＳＫＳ2 ）を用いて、上記した実施
例と同形状に加工し、後述する特性評価に供した。Comparative Example 10 A conventional alloy tool steel (SKS2) was used to form the same shape as that of the above-mentioned embodiment, and was subjected to the characteristic evaluation described later.
【００５２】上述した実施例１〜１４および比較例１〜
１０による各試料を、塩水（濃度=20%)、硫酸（濃度=5
%)、酢酸（濃度=5%)の各溶液中に72時間放置し、その後
の腐食の有無を目視観察した。また、アスコルビン酸粉
末と接触させた状態で 5日間放置した後に腐食の有無を
目視観察した。その結果を表３に示す。The above Examples 1 to 14 and Comparative Examples 1 to
Each sample from No. 10 was treated with saline (concentration = 20%), sulfuric acid (concentration = 5%).
%) And acetic acid (concentration = 5%) in each solution for 72 hours, and then visually observed for corrosion. Further, after being left in contact with the ascorbic acid powder for 5 days, the presence or absence of corrosion was visually observed. Table 3 shows the results.
【００５３】[0053]
【表３】 [Table 3]
【００５４】表３から明らかなように、各実施例による
合金試料は十分な硬度（時効処理後）を有すると共に、
耐食性に優れていることが分かる。従って、このような
Ｎｉ−Ｃｒ−Ａｌ系合金を、例えば酸性粉末の加圧成形
型に適用することによって、型寿命を大幅に向上させる
ことが可能となる。As is clear from Table 3, the alloy samples according to the examples have sufficient hardness (after aging treatment),
It turns out that it is excellent in corrosion resistance. Therefore, by applying such a Ni-Cr-Al-based alloy to, for example, a pressure-molding mold of an acidic powder, the mold life can be significantly improved.
【００５５】[0055]
【発明の効果】以上説明したように、本発明の加圧成形
型用合金によれば、十分な強度と良好な耐食性とを併せ
持つ型材料を提供することができる。従って、例えば腐
食性物質を含む原料物質の加圧成形に適用する場合にお
いて、型寿命の長寿命化を達成することができる。ま
た、そのような加圧成形型の低コスト化および高精度化
が実現可能となる。As described above, according to the alloy for a press forming die of the present invention, a die material having both sufficient strength and good corrosion resistance can be provided. Therefore, for example, when applied to pressure molding of a raw material containing a corrosive substance, it is possible to achieve a longer mold life. Further, cost reduction and high accuracy of such a pressure forming die can be realized.
【図１】 本発明の加圧成形型用合金を使用した型を有
する加圧成形機の一構成例を示す図である。FIG. 1 is a view showing one configuration example of a pressure molding machine having a mold using the alloy for a pressure molding die of the present invention.
【符号の説明】 １……上杵 ２……下杵 ３……臼 １０……加圧成形機[Description of Signs] 1 ... Upper punch 2 ... Lower punch 3 ... Mill 10 ... Press forming machine
Claims (10)
量% の範囲で含み、残部が実質的にＮｉからなることを
特徴とする加圧成形型用合金。1. An alloy for a press-molding die comprising 25 to 60% by weight of Cr and 0.01 to 10% by weight of Al, with the balance substantially consisting of Ni.
量% 、Ｓｉ、Ｃ、Ｍｇ、Ｍｎ、ＴｉおよびＢから選ばれ
る少なくとも 1種の元素を 0.8重量% 以下の範囲で含
み、残部が実質的にＮｉからなることを特徴とする加圧
成形型用合金。2. An alloy containing 25 to 60% by weight of Cr, 0.01 to 10% by weight of Al, and at least one element selected from Si, C, Mg, Mn, Ti and B in a range of 0.8% by weight or less, An alloy for a press forming die, the balance being substantially composed of Ni.
型用合金において、 前記Ｃｒを30〜45重量% の範囲で含むことを特徴とする
加圧成形型用合金。3. The alloy according to claim 1, wherein said Cr is contained in the range of 30 to 45% by weight.
型用合金において、 前記Ａｌを 0.1〜 5重量% の範囲で含むことを特徴とす
る加圧成形型用合金。4. The alloy according to claim 1, wherein said Al is contained in the range of 0.1 to 5% by weight.
て、 Ｍｎ、Ｓｉ、ＣおよびＭｇから選ばれる少なくとも 1種
の元素を 0.005〜 0.1重量% の範囲で含むことを特徴と
する加圧成形型用合金。5. The alloy according to claim 2, wherein at least one element selected from Mn, Si, C and Mg is contained in a range of 0.005 to 0.1% by weight. Alloy for molds.
て、 Ｍｇ、ＴｉおよびＢから選ばれる少なくとも 1種の元素
を 0.005〜 0.1重量%の範囲で含むことを特徴とする加
圧成形型用合金。6. The pressure-forming alloy according to claim 2, wherein at least one element selected from Mg, Ti and B is contained in a range of 0.005 to 0.1% by weight. For alloys.
記載の加圧成形型用合金において、 JIS Z 2244-1992 で規定するビッカース硬さで 500Hv以
上の硬度を有することを特徴とする加圧成形型用合金。7. A compacting type alloy according to any one of claims 1 to 6, characterized in that it has a hardness of more than 500Hv of Vickers hardness defined in JIS Z 2244 -1,992 Alloy for press forming mold.
記載の加圧成形型用合金において、 腐食性物質を含む原料物質の加圧成形用型に用いられる
ことを特徴とする加圧成形型用合金。8. The pressure-forming alloy according to claim 1, wherein the alloy is used for a pressure-forming die of a raw material containing a corrosive substance. Alloy for molds.
て、 前記腐食性物質は酸性粉末を含むことを特徴とする加圧
成形型用合金。9. The alloy according to claim 8, wherein the corrosive substance includes an acidic powder.
項記載の加圧成形型用合金において、 原料物質を成形する際に使用される杵および臼から選ば
れる少なくとも 1種に用いられることを特徴とする加圧
成形型用合金。10. The method according to claim 1, wherein
Item 8. The alloy for a press forming die according to the above item 2, wherein the alloy is used for at least one selected from a punch and a die used for forming a raw material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23987699A JP4567826B2 (en) | 1999-08-26 | 1999-08-26 | Press forming mold alloy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23987699A JP4567826B2 (en) | 1999-08-26 | 1999-08-26 | Press forming mold alloy |
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| Publication Number | Publication Date |
|---|---|
| JP2001062594A true JP2001062594A (en) | 2001-03-13 |
| JP4567826B2 JP4567826B2 (en) | 2010-10-20 |
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|---|---|---|---|
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| JP2002294374A (en) * | 2001-04-04 | 2002-10-09 | Hitachi Metals Ltd | Ni BASED CAST HEAT RESISTANT SUPERALLOY AND TURBINE WHEEL MADE OF THE Ni BASED SUPERALLOY |
| WO2006035671A1 (en) * | 2004-09-30 | 2006-04-06 | Kabushiki Kaisha Toshiba | Alloy with high hardness, high corrosion resistance and high abrasion resistance |
| JP2006291261A (en) * | 2005-04-07 | 2006-10-26 | Daido Steel Co Ltd | High-strength thin wire and manufacturing method thereof |
| JP2007289993A (en) * | 2006-04-24 | 2007-11-08 | Daido Steel Co Ltd | Die for powder molding |
| JP2009052084A (en) * | 2007-08-27 | 2009-03-12 | Mitsubishi Materials Corp | Mold member for resin molding |
| US7682474B2 (en) | 2002-05-15 | 2010-03-23 | Kabushiki Kaisha Toshiba | Cutter composed of Ni-Cr-Al Alloy |
| JP2011001606A (en) * | 2009-06-18 | 2011-01-06 | Toshiba Corp | Alloy material with high hardness, high corrosion resistance and high wear resistance, wear-resistant member using the same, and method for producing the wear-resistant member |
| JP2011068961A (en) * | 2009-09-28 | 2011-04-07 | Toshiba Corp | PESTLE AND MORTAR FOR MOLDING TABLET USING Ni-Cr-Al SYSTEM ALLOY |
| CN103422003A (en) * | 2013-05-15 | 2013-12-04 | 锡山区羊尖泓之盛五金厂 | Nichrome |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002294374A (en) * | 2001-04-04 | 2002-10-09 | Hitachi Metals Ltd | Ni BASED CAST HEAT RESISTANT SUPERALLOY AND TURBINE WHEEL MADE OF THE Ni BASED SUPERALLOY |
| US7682474B2 (en) | 2002-05-15 | 2010-03-23 | Kabushiki Kaisha Toshiba | Cutter composed of Ni-Cr-Al Alloy |
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| JP2011001606A (en) * | 2009-06-18 | 2011-01-06 | Toshiba Corp | Alloy material with high hardness, high corrosion resistance and high wear resistance, wear-resistant member using the same, and method for producing the wear-resistant member |
| JP2011068961A (en) * | 2009-09-28 | 2011-04-07 | Toshiba Corp | PESTLE AND MORTAR FOR MOLDING TABLET USING Ni-Cr-Al SYSTEM ALLOY |
| CN103422003A (en) * | 2013-05-15 | 2013-12-04 | 锡山区羊尖泓之盛五金厂 | Nichrome |
| CN103422003B (en) * | 2013-05-15 | 2015-06-17 | 锡山区羊尖泓之盛五金厂 | Nichrome |
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