JPH08260082A - Ni-be alloy for explosion-proof tool - Google Patents
Ni-be alloy for explosion-proof toolInfo
- Publication number
- JPH08260082A JPH08260082A JP6754095A JP6754095A JPH08260082A JP H08260082 A JPH08260082 A JP H08260082A JP 6754095 A JP6754095 A JP 6754095A JP 6754095 A JP6754095 A JP 6754095A JP H08260082 A JPH08260082 A JP H08260082A
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- explosion
- proof
- tool
- hardness
- 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.)
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、単に防爆性のみなら
ず、高強度および高硬度が要求される、ドリルやタガネ
等の防爆工具としての用途に用いて好適なNi−Be系合金
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a Ni-Be alloy suitable for use as an explosion-proof tool such as a drill or chisel, which requires not only explosion-proof property but also high strength and hardness. Is.
【０００２】[0002]
【従来の技術】衝突や摩擦によって発生する火花が原因
で爆発事故が起きるような雰囲気環境下で作業を行う場
合、作業工具としては、衝突や摩擦等によって火花が発
生することのない防爆性（非発火性）の工具が用いられ
る。ここに、良好な防爆性を得るには、(1) 工具中にＣ
を含有しない、(2) 工具中にFeを含有しない、(3) 工具
の熱伝導性が良いことが必要とされ、従ってＣやFeを含
有する一般の鋼製工具はこの種の用途に用いることはで
きない。このため、防爆工具用素材としては、通常、銅
合金が用いられている。2. Description of the Related Art When working in an atmosphere environment in which an explosion accident occurs due to a spark generated by collision or friction, a work tool has an explosion proof property that does not generate sparks due to collision or friction. Non-incendive) tools are used. Here, in order to obtain good explosion-proof property, (1) C in the tool
Is not contained, (2) Fe is not contained in the tool, (3) The thermal conductivity of the tool is required to be good, so general steel tools containing C and Fe are used for this type of application. It is not possible. Therefore, a copper alloy is usually used as a material for explosion-proof tools.
【０００３】ところで、作業内容によっては、防爆性だ
けでなく、高強度や高硬度な作業工具が必要とされる場
合があり、このような場合には、銅合金の中でも最も強
度や硬度が高いとされるベリリウム銅合金製の工具が広
く使用されている。なお、このベリリウム銅合金製工具
は、日本工業規格（ＪＩＳ）にも防爆用工具として指定
されている。しかしながら、このベリリウム銅合金は、
銅合金の中では最も強さおよび硬さが高い材料であると
はいうものの、一般の鋼製工具（例えば工具鋼）と比べ
ると依然として強さおよび硬さとも劣っており、工具寿
命は鋼製工具に較べると短いという欠点があった。ま
た、特にコンクリート掘削用ドリルとしては、ベリリウ
ム銅合金製ドリルでは硬さが不足し、ドリルの先端が短
時間で摩耗するため、実使用には供し得ないという問題
があった。Depending on the type of work, there are cases where work tools having high strength and hardness as well as explosion proof properties are required. In such a case, the strength and hardness are the highest among copper alloys. Tools made of beryllium copper alloy are widely used. The beryllium copper alloy tool is also designated as an explosion-proof tool in the Japanese Industrial Standard (JIS). However, this beryllium copper alloy
Although it is the material with the highest strength and hardness among copper alloys, it is still inferior in strength and hardness compared to general steel tools (for example, tool steel), and the tool life is It had the drawback of being shorter than tools. Moreover, as a drill for concrete excavation, a beryllium-copper alloy drill has a problem that it cannot be used for actual use because its hardness is insufficient and the tip of the drill is worn in a short time.
【０００４】[0004]
【発明が解決しようとする課題】この発明は、上記の問
題を有利に解決するもので、防爆性に優れるのはいうま
でもなく、従来の銅合金製工具に較べて、強度および硬
度が格段に高い、防爆工具用Ni−Be系合金を提案するこ
とを目的とする。The present invention advantageously solves the above problems and, needless to say, is excellent in explosion-proof property, and is much stronger and harder than conventional copper alloy tools. The purpose of the present invention is to propose a Ni-Be based alloy for explosion-proof tools.
【０００５】[0005]
【課題を解決するための手段】さて、発明者らは、上記
の問題を解決すべく、鋭意研究を重ねた結果、Niをベー
スとするNi−Be合金にTiを少量添加することにより、所
期した目的が有利に達成されることの知見を得た。ま
た、さらにMnやMgを複合添加すると熱間での加工性が格
段に向上することの知見を得た。この発明は、上記の知
見に立脚するものである。[Means for Solving the Problems] As a result of intensive studies to solve the above problems, the inventors have found that by adding a small amount of Ti to a Ni-Be alloy based on Ni, We have found that the intended purpose can be achieved advantageously. In addition, it was found that the workability during hot work is remarkably improved by further adding Mn and Mg together. The present invention is based on the above findings.
【０００６】すなわち、この発明は、Be：1.80〜2.00wt
％およびTi：0.30〜0.60wt％を含有し、残部は実質的に
Niの組成になる防爆工具用Ni−Be系合金（第１発明）で
ある。That is, the present invention provides Be: 1.80 to 2.00 wt.
% And Ti: 0.30 to 0.60 wt%, the balance is substantially
It is a Ni-Be alloy for explosion-proof tools (first invention) having a composition of Ni.
【０００７】また、この発明は、Be：1.80〜2.00wt％お
よびTi：0.30〜1.00wt％を含み、かつMnおよびMgのうち
から選んだ１種または２種合計：0.50wt％以下を含有
し、残部は実質的にNiの組成になる防爆工具用Ni−Be系
合金（第２発明）である。Further, the present invention contains Be: 1.80 to 2.00 wt% and Ti: 0.30 to 1.00 wt%, and one or two kinds selected from Mn and Mg in total: 0.50 wt% or less. The balance is a Ni-Be alloy for explosion-proof tools (second invention) having a substantially Ni composition.
【０００８】なお、Ni−Be合金およびNi−Be−Ti合金そ
のものは従来から知られていたが、かような合金の用途
は従来、自動車のエアバックや消化用スプリンクラーの
接点バネ等のバネ材料としてのみであり、本発明で対象
とする防爆工具用材料としての用途に供されたためしは
ない。Although Ni-Be alloys and Ni-Be-Ti alloys themselves have been heretofore known, such alloys have hitherto been used as spring materials such as contact springs for automobile airbags and extinguishing sprinklers. However, it has not been used as a material for an explosion-proof tool targeted by the present invention.
【０００９】[0009]
【作用】まず、この発明において、合金の成分組成を上
記の範囲に限定した理由について説明する。 Be：1.80〜2.00wt％ Beは、強度とくに高温での強度および硬度の向上に有効
に寄与するだけでなく、耐食性の向上にも有用な元素で
あるが、含有量が1.80wt％に満たないとその添加効果に
乏しく、一方2.00wt％を超えて添加してもそれ以上の効
果の向上は望み得ず、むしろコストや加工性の面での不
利が生じるので、1.80〜2.00wt％の範囲に限定した。First, the reason why the alloy composition in the present invention is limited to the above range will be described. Be: 1.80 to 2.00 wt% Be is an element that not only effectively contributes to the improvement of strength, especially strength and hardness at high temperatures, but is also useful for improving corrosion resistance, but its content is less than 1.80 wt%. However, the addition of more than 2.00 wt% cannot be expected to improve the effect any more, and there is a disadvantage in terms of cost and workability, so the range of 1.80-2.00 wt% Limited to.
【００１０】Ti：0.30〜1.00wt％ Tiは、引張強さ、硬さおよび伸び等の機械的性質を向上
させる有用元素であるが、含有量が0.30wt％に満たない
とその添加効果に乏しく、一方1.00wt％を超えると引張
強さや硬さの低下を招くので、0.30〜1.00wt％の範囲に
限定した。より好ましい範囲は、0.40〜0.60wt％であ
る。Ti: 0.30 to 1.00 wt% Ti is a useful element that improves mechanical properties such as tensile strength, hardness and elongation, but if the content is less than 0.30 wt% the effect of addition is poor. On the other hand, if it exceeds 1.00 wt%, the tensile strength and hardness will be reduced, so the range was limited to 0.30 to 1.00 wt%. A more preferable range is 0.40 to 0.60 wt%.
【００１１】さらに、この発明では、熱間鍛造や熱間圧
延等の熱間塑性加工性の向上を目的として、Mnおよび／
またはMgを0.50wt％以下の範囲で添加することができ
る。ここに、これら元素の含有量の上限を0.50wt％とし
たのは、単独使用または複合使用いずれの場合において
も、含有量が0.50wt％を超えるとかえって引張強さや硬
さの低下を招くからである。なお、かかる元素の好適含
有量は0.01〜0.30wt％である。Further, in the present invention, in order to improve hot plastic workability such as hot forging and hot rolling, Mn and / or
Alternatively, Mg can be added in a range of 0.50 wt% or less. Here, the upper limit of the content of these elements is set to 0.50 wt%, because in either case of single use or composite use, if the content exceeds 0.50 wt%, the tensile strength and hardness are rather lowered. Is. The preferable content of such an element is 0.01 to 0.30 wt%.
【００１２】次に、本発明のNi−Be系合金の製造方法に
ついて説明する。本合金は、析出硬化型合金であるた
め、溶体化処理と時効処理の２ステップの熱処理を施す
ことにより、従来の銅合金では得られなかった高強度・
高硬度特性を発揮させることができる。本合金は、上記
の熱処理を除けば、他の一般のニッケル基合金と同様の
製造法によって製造することができる。Next, a method for manufacturing the Ni-Be alloy of the present invention will be described. Since this alloy is a precipitation hardening type alloy, it is possible to obtain a high strength /
High hardness characteristics can be exhibited. The present alloy can be manufactured by the same manufacturing method as other general nickel-based alloys except for the above heat treatment.
【００１３】その代表的な製造プロセスについて述べる
と、まず溶解・鋳造で鋳塊を造り、熱間加工（鍛造や圧
延）によって目的とする製品の粗形に成形する。つい
で、 950〜1080℃，３分〜３時間程度の溶体化処理を施
す。この状態では本合金は、硬さがロックウエルＢで70
〜100 と比較的軟らかいので、容易に切削加工を行うこ
とができる。そこで、この段階で、素材から最終製品に
近い形状まで中間成形を行う。その後、 450〜650 ℃，
１〜４時間程度の時効処理により、本合金の強度、硬度
を最高強度、硬度まで上昇させたのち、切削加工により
最終製品形状に仕上げる。ここに、本発明によって得ら
れる合金の強度は 150〜210 kgf/mm2 程度、また硬度は
ロックウエルＣ（ＨRC）で 47 〜 53 であり、従来のベ
リリウム銅合金のそれらがそれぞれ、 120〜155 kgf/mm
2 程度、またＨRC： 38 〜 43 であることと比較する
と、両特性とも格段に向上しているといえる。The typical manufacturing process will be described. First, an ingot is formed by melting and casting, and hot working (forging or rolling) is performed to form a desired product into a rough shape. Then, solution treatment is performed at 950 to 1080 ° C. for about 3 minutes to 3 hours. In this state, the hardness of this alloy is 70 in Rockwell B.
Since it is relatively soft up to ~ 100, it can be easily cut. Therefore, at this stage, intermediate molding is performed from the material to the shape close to the final product. After that, 450 ~ 650 ℃,
After aging treatment for about 1 to 4 hours, the strength and hardness of the alloy are increased to the maximum strength and hardness, and then the final product shape is finished by cutting. Here, the strength of the alloy obtained by the present invention is about 150 to 210 kgf / mm 2 , and the hardness is 47 to 53 in Rockwell C (H RC ), and those of the conventional beryllium copper alloys are 120 to 155, respectively. kgf / mm
It can be said that both characteristics are remarkably improved when compared with about 2 and H RC : 38 to 43.
【００１４】なお、溶体化処理後に、切削加工によって
最終製品形状まで仕上げたとしても、次の時効処理で若
干変形を起こすので、寸法精度の厳しい製品を得ること
は難しい。また素材を溶体化処理後、時効処理を施して
から、切削加工で直接最終製品にする方法は、切削量が
多いだけでなく、素材が非常に硬いので、経済的に得策
とは言えない。Even if the final product shape is finished by cutting after the solution treatment, it is difficult to obtain a product with strict dimensional accuracy because it will be slightly deformed by the next aging treatment. Further, a method of subjecting a material to a solution treatment, then an aging treatment, and then directly cutting it into a final product is not economically advantageous because not only a large amount of cutting is required but also the material is extremely hard.
【００１５】[0015]
【実施例】表１に示す種々の組成になるNi−Be系合金の
鋳塊を、熱間塑性加工により粗成形した後、1040℃，２
時間の溶体化処理を施した。ついで、中間成形後、510
℃，３時間の時効処理を施したのち、切削加工により最
終製品形状に仕上げた。かくして得られた各製品の引張
強さ、硬さおよび伸び、ならびに熱間塑性加工時におけ
るエッジ割れの個数および研削時における火花発生の有
無について調査した結果を表１に整理して示す。なお、
表１には、比較のため、従来のベリリウム銅25合金およ
び鋼製工具鋼についての調査結果も併せて示した。[Examples] Ingots of Ni-Be alloys having various compositions shown in Table 1 were roughly formed by hot plastic working and then at 1040 ° C for 2 hours.
A solution treatment for a period of time was performed. Then, after intermediate molding, 510
After aging treatment at ℃ for 3 hours, the final product shape was finished by cutting. Table 1 shows the results of an examination of the tensile strength, hardness and elongation of each product thus obtained, the number of edge cracks during hot plastic working, and the presence or absence of sparks during grinding. In addition,
For comparison, Table 1 also shows the results of a survey on conventional beryllium copper 25 alloy and steel tool steel.
【００１６】[0016]
【表１】 [Table 1]
【００１７】同表から明らかなように、本発明に従い得
られた製品はいずれも、防爆性は勿論のこと、引張強
さ、硬さおよび伸び等の機械的性質に優れ、またとくに
MnやMgを複合含有させたものは、熱間での塑性加工性に
も秀でていた。これに対し、従来のベリリウム銅25合金
は機械的性質の面で、また鋼製工具鋼は防爆性の点で劣
っていた。As is clear from the table, all the products obtained according to the present invention have not only explosion-proof properties but also excellent mechanical properties such as tensile strength, hardness and elongation, and particularly
The composite inclusion of Mn and Mg was also excellent in hot plastic workability. On the other hand, the conventional beryllium copper 25 alloy was inferior in mechanical properties, and the steel tool steel was inferior in explosion-proof property.
【００１８】[0018]
【発明の効果】かくして本発明によれば、防爆性に優れ
るのは言うまでもなく、高強度かつ高硬度のNi−Be系合
金を得ることができ、防爆工具用素材として偉効を奏す
る。As described above, according to the present invention, needless to say, it is possible to obtain a high-strength and high-hardness Ni-Be alloy, not to mention that it is excellent in explosion-proof property, and is very effective as a material for explosion-proof tools.
Claims (2)
wt％を含有し、残部は実質的にNiの組成になる防爆工具
用Ni−Be系合金。1. Be: 1.80 to 2.00 wt% and Ti: 0.30 to 1.00
Ni-Be alloy for explosion-proof tools that contains wt% and the balance is Ni.
wt％を含み、かつMnおよびMgのうちから選んだ１種また
は２種合計：0.50wt％以下を含有し、残部は実質的にNi
の組成になる防爆工具用Ni−Be系合金。2. Be: 1.80 to 2.00 wt% and Ti: 0.30 to 1.00
wt%, and one or two total selected from Mn and Mg: 0.50 wt% or less, the balance being substantially Ni
Ni-Be alloy for explosion-proof tools with the composition below.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6754095A JPH08260082A (en) | 1995-03-27 | 1995-03-27 | Ni-be alloy for explosion-proof tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6754095A JPH08260082A (en) | 1995-03-27 | 1995-03-27 | Ni-be alloy for explosion-proof tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08260082A true JPH08260082A (en) | 1996-10-08 |
Family
ID=13347916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6754095A Pending JPH08260082A (en) | 1995-03-27 | 1995-03-27 | Ni-be alloy for explosion-proof tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08260082A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001015837A1 (en) * | 1999-09-01 | 2001-03-08 | Brush Wellman, Inc. | Improved dies for die casting aluminum and other metals |
| CN102489644A (en) * | 2011-12-13 | 2012-06-13 | 天津欧克防爆工具有限公司 | Method for forging copper alloy anti-explosion tool |
| CN109321781A (en) * | 2018-10-09 | 2019-02-12 | 北京金达太钢石化配件有限公司 | A kind of new nickel-base alloy and preparation method thereof |
-
1995
- 1995-03-27 JP JP6754095A patent/JPH08260082A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001015837A1 (en) * | 1999-09-01 | 2001-03-08 | Brush Wellman, Inc. | Improved dies for die casting aluminum and other metals |
| US7056395B1 (en) * | 1999-09-01 | 2006-06-06 | Brush Wellman, Inc. | Dies for die casting aluminum and other metals |
| CN102489644A (en) * | 2011-12-13 | 2012-06-13 | 天津欧克防爆工具有限公司 | Method for forging copper alloy anti-explosion tool |
| CN109321781A (en) * | 2018-10-09 | 2019-02-12 | 北京金达太钢石化配件有限公司 | A kind of new nickel-base alloy and preparation method thereof |
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|---|---|---|---|
| A02 | Decision of refusal |
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