CN1031258A - Moulding stock of molybdenum based metall-ceramic used for hot rolling - Google Patents
Moulding stock of molybdenum based metall-ceramic used for hot rolling Download PDFInfo
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- CN1031258A CN1031258A CN 87106824 CN87106824A CN1031258A CN 1031258 A CN1031258 A CN 1031258A CN 87106824 CN87106824 CN 87106824 CN 87106824 A CN87106824 A CN 87106824A CN 1031258 A CN1031258 A CN 1031258A
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Abstract
The invention belongs to the sintering metal field.It mainly is the material that is applicable to preparation hot rolling mould.The designed cermet material of the present invention is to be base with the metal molybdenum, has added ceramic phase and other metallic element simultaneously again.Because ceramic phase itself has good chemical stability and wear resistance in the material of the present invention, hardness is more or less the same during simultaneously at high temperature with room temperature, can form sosoloid with metallic element again, therefore can improve the thermal shock resistance and the hot strength of material of the present invention.
Description
The invention belongs to cermet material.Be applicable to that mainly hot rolling becomes the mould materials of section bar.
Swing forging is a kind of new pressure processing method that begins to enter the practical stage sixties in this century, because that it has is laborsaving, precision is high, save the energy and starting material, be easy to realize mechanize, can realize the processing of few chipless, also advantage such as nuisanceless, therefore the swing forging technical development is very fast, especially cold rolling and temperature rolling technical development are very fast, and the hot rolling technology is owing to be subjected to the restriction of the existing problem of mould, and tempo is very slow.
At present, in the hot rolling technical field, as the hot rolling moulding stock, common employed mould materials have superalloy (GH
135), molybdenum alloy (TZM), Wimet (TiC) and 3Cr
2W
8Deng material.But these materials have all limited the development of hot rolling technology as the hot rolling mould because of work-ing life is low, and these moulding stock also exist the shortcomings such as poor product quality that the Mould Machining expense is high and produced.Therefore above-mentioned materials as hot rolling mould materials because of being not suitable for hot rolling technical field development quilt being eliminated gradually.
The objective of the invention is to design a kind ofly have long service life and hot strength height, thermal fatigue resistance is good and when work sticking iron scale possess the good molybdenum-based cermet material of self-lubricating property again as preparation hot rolling mould.
By the cermet material that the present invention designs, its chemical ingredients is (weight %) Mo 35-75%; Al
2O
37-30%; Cr 10～35%; La
2O
30-12%; Any one or two kinds of above sum in Ni, Fe, three kinds of elements of Co is 1-15%.
Owing to adopted above-mentioned composition design, sintering metal of the present invention has good thermal fatigue resistance, mould by this material preparation, under 850～1120 ℃ of temperature and can long time continuous working under the effect of alternation eccentric load and indeformable, possess self-lubricating property and not sticking iron scale under the hot rolling temperature, it is good that sintering metal of the present invention also possesses hot strength simultaneously, the hot hardness height, but this at normal temperatures sintering metal also can carry out lathe smear metal processing, is beneficial to the finishing of mould like this.
Cermet material of the present invention, the metallic element that contains has Mo, Cr, Ni, Fe, Co etc., also contains ceramic phase aluminium sesquioxide and lanthanum sesquioxide simultaneously.
The adding of molybdenum in sintering metal of the present invention can make the fusing point of material improve, and it and metallic element Cr, Ni etc. form sosoloid, make this kind material have good high-temperature intensity, and its chemical ingredients is (weight %) 35-75%.
The present invention adds metallic element chromium, and purpose is to improve the wear resistance of material, and chromium and affinity for oxygen are big; can form protective oxide film; stop oxygenizement to develop to material internal, can also stop the formation and development of upper layer crackle, its chemical ingredients (weight %) is 10～35%.
Add metallic nickel in the present invention, it can form solid alloy with molybdenum, chromium, can improve toughness, intensity and the density of material, and processing characteristics is improved.Though the substituted metal nickel that metallic elements of ferrum and cobalt can be part or all of, but the physicals to cermet material of the present invention has certain loss, therefore the element more than any one or two kinds of in metallic element Ni, Fe, three kinds of elements of Co adds in the material of the present invention in cermet material of the present invention, and its chemical composition content is (weight %) 1-15%.
In material of the present invention, add ceramic phase aluminium sesquioxide and lanthanum sesquioxide, can form sosoloid between them, can improve the thermal shock resistance and the hot strength of material.Aluminium sesquioxide itself has good chemical stability and wear resistance again, and its hardness and normal temperature hardness are more or less the same under 1000 ℃ of left and right sides temperature.Aluminium sesquioxide and chromic oxide also can form sosoloid, can improve the bonding properties of material.Therefore the chemical composition content of aluminium sesquioxide is (weight %) 7-30% in material of the present invention.The chemical composition content of lanthanum sesquioxide is (weight %) 0-12%.
Cermet material of the present invention is to adopt the powder metallurgy process preparation, and its preparation method is as follows:
The batching, with the various raw material powders of weight percent weighing.The purity and the granularity of its various powder are provided by table 1.
Table 1 purity of raw materials of the present invention, granularity
| Component | Mo | Al 2O 3 | Cr | La 2O 3 | Ni | Fe | Co |
| Purity (%) | 99.5 | 99.0 | 99.5 | 99.5 | 99.5 | 99.5 | 99.5 |
| Mean particle size (μ M) | ≤10 | ≤30 | ≤20 | ≤10 | ≤10 | ≤20 | ≤20 |
2. the raw material powder that mixes, prepare is packed in the wet wheeling machine Wimet tube, and the sintered carbide ball in the tube for heavy 2.5 times of material, is a ball-milling medium with alcohol heavily, and the ball milling time is 100～150 hours, behind the mill powder is dried.
3. compression moulding, elder generation become designed shape, size with powder combinations and the pressed compact of certain density and intensity are arranged, the preparation of this pressed compact is in the plastelast that the powder of mixing is packed into selected is overlapped, putting into isostatic pressing machine after sealing, is 2T/cm in unit pressure
2Pressure under compression moulding.
4. sintering, pressed compact spare are at high temperature to carry out agglomerating, feed during sintering to keep gas.
5. machining: the mould that cermet material of the present invention is prepared, can adopt lathe turning processing, can obtain surface of good smooth finish after the processing.
Cermet material of the present invention has following characteristics compared with prior art.
1. material of the present invention has high life as moulds such as hot rolling dish springs.Life-span by hot rolling mould in the mould of material preparation of the present invention and the prior art relatively sees Table 2.
The work-ing life of moulding stock relatively in table 2 moulding stock of the present invention and the prior art
2. by the prepared mould of material of the present invention, have good self-lubricating function (need not add any lubricant), not sticking iron scale, it is compared with other mould, and it is good by spreading part products surface quality, the yield rate height.
3. cermet material of the present invention has the good high-temperature performance, and thermal fatigue resistance is good, and the hot strength height can long time continuous working under 850～1120 ℃ of temperature and the effect of alternation eccentric load and indeformable.
Embodiment
Prepared the cermet material of four component contents in the chemical ingredients scope of cermet material of the present invention, the purity of material is identical with granularity and table 1, and the chemical composition content of respectively organizing of material sees Table 3.
The cermet mold chemical composition content (weight %) of four kinds of compositions of table 3
After the cermet material of above-mentioned four kinds of compositions prepares, mixing stirs and ball milling respectively again, it is ball-milling medium that ball milling adopts alcohol, ball heavily is 2.5 times of grain weight, ball milling is to carry out in the Wimet tube, the ball milling time is 100 hours, and the powder behind the ball milling reinstalls in the plastelast cover, through isostatic pressing after taking out oven dry.The sintering of pressed compact spare is to carry out in being connected with the protective atmosphere high temperature sintering furnace, and the hardness of mold members and work-ing life are listed in table 4 behind the sintering.
The work-ing life of table 4 mould and hardness
Claims (1)
1, a kind of cermet material that is used to make the hot rolling mould is characterized in that the chemical ingredients of this cermet material is: (weight %) Mo35-75%; Al
2O
37-30%; Cr10-35%; La
2O
30-12%; Any one or two kinds of above sum in Ni, Fe, three kinds of elements of Co is 1-15%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87106824.9A CN1003718B (en) | 1987-10-12 | 1987-10-12 | Molybdenum-based metal ceramic die material for hot rolling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87106824.9A CN1003718B (en) | 1987-10-12 | 1987-10-12 | Molybdenum-based metal ceramic die material for hot rolling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1031258A true CN1031258A (en) | 1989-02-22 |
| CN1003718B CN1003718B (en) | 1989-03-29 |
Family
ID=4815865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN87106824.9A Expired CN1003718B (en) | 1987-10-12 | 1987-10-12 | Molybdenum-based metal ceramic die material for hot rolling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1003718B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100484661C (en) * | 2006-08-16 | 2009-05-06 | 山东大学 | Molybdenum base cermet containing SiC, Fe, C and Cr |
| CN102414347A (en) * | 2009-05-08 | 2012-04-11 | 夏普株式会社 | Method for forming an anodized layer, method for manufacturing a mold, and mold |
| CN102690980A (en) * | 2012-01-13 | 2012-09-26 | 河南科技大学 | High-temperature oxidation and wear resistant molybdenum alloy and preparation method thereof |
| CN103627940A (en) * | 2013-11-27 | 2014-03-12 | 江西理工大学 | Powder metallurgical molybdenum base material applied to hot extrusion die and method for forming die |
| CN104862569A (en) * | 2015-05-17 | 2015-08-26 | 江西理工大学 | Molybdenum-based material used for hot extrusion die and surface carburizing treatment technology |
| CN105603284A (en) * | 2016-01-14 | 2016-05-25 | 洛阳三睿宝纳米科技有限公司 | Metal ceramic material containing nanoscale boehmite and preparation method of metal ceramic material |
| CN112195385A (en) * | 2020-10-16 | 2021-01-08 | 内蒙金属材料研究所 | High-temperature-resistant high-toughness molybdenum-based composite material and preparation method thereof |
-
1987
- 1987-10-12 CN CN87106824.9A patent/CN1003718B/en not_active Expired
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100484661C (en) * | 2006-08-16 | 2009-05-06 | 山东大学 | Molybdenum base cermet containing SiC, Fe, C and Cr |
| CN102414347A (en) * | 2009-05-08 | 2012-04-11 | 夏普株式会社 | Method for forming an anodized layer, method for manufacturing a mold, and mold |
| CN102414347B (en) * | 2009-05-08 | 2015-09-23 | 夏普株式会社 | The formation method of anodic oxide coating, the manufacture method of mould and mould |
| CN102690980A (en) * | 2012-01-13 | 2012-09-26 | 河南科技大学 | High-temperature oxidation and wear resistant molybdenum alloy and preparation method thereof |
| CN102690980B (en) * | 2012-01-13 | 2014-04-16 | 河南科技大学 | High-temperature oxidation and wear resistant molybdenum alloy and preparation method thereof |
| CN103627940A (en) * | 2013-11-27 | 2014-03-12 | 江西理工大学 | Powder metallurgical molybdenum base material applied to hot extrusion die and method for forming die |
| CN103627940B (en) * | 2013-11-27 | 2015-06-10 | 江西理工大学 | Powder metallurgical molybdenum base material applied to hot extrusion die and method for forming die |
| CN104862569A (en) * | 2015-05-17 | 2015-08-26 | 江西理工大学 | Molybdenum-based material used for hot extrusion die and surface carburizing treatment technology |
| CN104862569B (en) * | 2015-05-17 | 2017-02-01 | 江西理工大学 | Molybdenum-based material used for hot extrusion die and surface carburizing treatment technology |
| CN105603284A (en) * | 2016-01-14 | 2016-05-25 | 洛阳三睿宝纳米科技有限公司 | Metal ceramic material containing nanoscale boehmite and preparation method of metal ceramic material |
| CN112195385A (en) * | 2020-10-16 | 2021-01-08 | 内蒙金属材料研究所 | High-temperature-resistant high-toughness molybdenum-based composite material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1003718B (en) | 1989-03-29 |
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