CN107326294A - Die casting steel - Google Patents
Die casting steel Download PDFInfo
- Publication number
- CN107326294A CN107326294A CN201610281766.0A CN201610281766A CN107326294A CN 107326294 A CN107326294 A CN 107326294A CN 201610281766 A CN201610281766 A CN 201610281766A CN 107326294 A CN107326294 A CN 107326294A
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- China
- Prior art keywords
- die casting
- steel
- mass percent
- surplus
- casting steel
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- 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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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/2209—Selection of die materials
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The present invention proposes a kind of die casting steel, including the mass percent of each composition be respectively：0.1% ＜ C ＜ 0.5%, Si ＜ 2%, Mn ＜ 3%, 3% ＜ Cr ＜ 15%, Mo ＜ 8%, V ＜ 3%, 0.03% ＜ S ＜ 0.15%, surplus are Fe and inevitable impurity.Die casting in the present invention has higher intensity with steel, and resistance to aluminium corrosion can effectively extend the service life of product, the requirement of product service precision is ensured for a long time.
Description
Technical field
The present invention relates to a kind of mould steel, more particularly to a kind of die casting steel.
Background technology
Mould steel is broadly divided into：Cold work die steel, hot die steel and the class of plastic die steel three, for forging
Make, punching press, cut type, die casting etc..Because various mould purposes are different, condition of work is complicated, therefore to mould
Tool steel, by the condition of work of its manufactured mould, should have high hardness, intensity, wearability, enough
Toughness, and high quenching degree, hardenability and other processing performances.Because this kind of purposes is different, work
Complicated condition, thus it is also different to the performance requirement of die steel.
The light alloy materials such as almag, because of the ability with high specific strength and atmospheric corrosion resistance, are received
It is manufacturing to pay attention to, the preferred material as many components of machine.Manufacture complex-shaped using extrusion process
Magnalium parts have energy-conservation, section material, pollute that small, process is few, efficiency high the characteristics of, therefore obtain
It is widely applied, and usage quantity increases year by year.However, in the production process of die casting, because of mould
And the production pause caused and product are qualified for damage (fracture, abrasion, cracking, burn into plastic deformation etc.)
Rate decline is increasingly severe, causes a large amount of human and material resources to waste.Thus, the service life of compression mod is low.
The content of the invention
In view of this, it is necessary to which a kind of die casting steel with higher hardness is provided.
A kind of die casting steel, including the mass percent of each composition be respectively：0.1% ＜ C ＜ 0.5%,
Si ＜ 2%, Mn ＜ 3%, 3% ＜ Cr ＜ 15%, Mo ＜ 8%, V ＜ 3%, 0.03% ＜ S ＜ 0.15%, it is remaining
Measure as Fe and inevitable impurity.
Preferred scheme is that it is 0.003% ＜ Ca ＜ also to include mass percent in the composition of the die casting steel
One or both of 0.2% and Zr ＜ 0.2%, surplus is Fe and inevitable impurity.
Preferred scheme is, the die casting also including mass percent is Ni=4%, Cu ＜ with the composition of steel
3%th, at least one of Co ＜ 15%, surplus is Fe and inevitable impurity.
Preferred scheme is, the die casting also including mass percent is W ＜ 5%, surplus with the composition of steel
For Fe and inevitable impurity.
Preferred scheme is that it is 0.003% ＜ Ca ＜ also to include mass percent in the composition of the die casting steel
One or both of 0.2% and Zr ＜ 0.2%, at least one of Ni=4%, Cu ＜ 3%, Co ＜ 15%,
And W ＜ 5%, surplus is Fe and inevitable impurity.
Preferred scheme is, the die casting with the composition of steel also including mass percent be Nb=2%,
At least one of Ti=2%, Ta ＜ 4%, AI ＜ 1%, surplus are Fe and inevitable impurity.
Preferred scheme is that it is 0.003% ＜ Ca ＜ also to include mass percent in the composition of the die casting steel
One or both of 0.2% and Zr ＜ 0.2%, at least one of Ni=4%, Cu ＜ 3%, Co ＜ 15%,
With W ＜ 5%, and at least one of Nb=2%, Ti=2%, Ta ＜ 4%, AI ＜ 1%, surplus is Fe
And inevitable impurity.
Preferred scheme is, the die casting is remaining with also including mass percent being B ＜ 0.01% in the composition of steel
Measure as Fe and inevitable impurity.
Preferred scheme is that it is 0.003% ＜ Ca ＜ also to include mass percent in the composition of the die casting steel
One or both of 0.2% and Zr ＜ 0.2%, at least one of Ni=4%, Cu ＜ 3%, Co ＜ 15%,
With W ＜ 5%, and at least one of Nb=2%, Ti=2%, Ta ＜ 4%, AI ＜ 1%, and B ＜ 0.01%,
Surplus is Fe and inevitable impurity.
Preferred scheme is, the die casting with also including mass percent being REM ＜ 0.5% in the composition of steel,
Surplus is Fe and inevitable impurity.
Beneficial effects of the present invention are：
Die casting in the present invention has higher intensity with steel, and resistance to aluminium corrosion can effectively extend product
Service life, ensures the requirement of product service precision for a long time.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to implementing
The accompanying drawing used required in example or description of the prior art is briefly described, it should be apparent that, describe below
In accompanying drawing be only some embodiments of the present invention, for those of ordinary skill in the art, do not paying
On the premise of going out creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the fabrication processing figure of die casting steel of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear
Chu, it is fully described by, it is clear that described embodiment is only a part of embodiment of the invention, rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creation
Property work under the premise of the every other embodiment that is obtained, belong to the scope of protection of the invention.
It is as shown in Figure 1 the manufacturing process flow of die casting steel of the invention, it comprises the following steps：
1st, in vaccum sensitive stove smelting and pouring into electrode bar；
2nd, ESR ingot is melt into electroslag；
3rd, Heating Steel Ingots are incubated 13-16 hours and form forging stock to 1200 DEG C；
4th, forging stock annealing obtains mould steel.
The die casting steel, the mass percent of its each composition included is respectively：0.1% ＜ C ＜ 0.5%,
Si ＜ 2%, Mn ＜ 3%, 3% ＜ Cr ＜ 15%, Mo ＜ 8%, V ＜ 3%, 0.03% ＜ S ＜ 0.15%, it is remaining
Measure as Fe and inevitable impurity.
When it is implemented, the die casting steel can also containing above-mentioned each composition C, Si, Mn, Cr, Mo,
Further contain other compositions on the basis of V, S and Fe, its other compositions contained can be divided into 6 kinds of implementations
Scheme, every kind of embodiment is respectively：
The first, can further contain one or both of Ca and Zr, wherein the quality percentage of each composition
Than being respectively 0.003% ＜ Ca ＜ 0.2%, Zr ＜ 0.2%；
Secondth, can be further containing at least one of Ni, Cu and Co, wherein the quality hundred of each composition
Divide than respectively Ni=4%, Cu ＜ 3%, Co ＜ 15%；
The third, can further contain W, its mass percent be W ＜ 5%；
4th kind, can be further at least one of containing Nb, Ti, Ta, AI, wherein the quality of each composition
Percentage is respectively Nb=2%, Ti=2%, Ta ＜ 4%, AI ＜ 1%；
5th kind, can further contain B, its mass percent be B ＜ 0.01%；
6th kind, can further contain REM, its mass percent be REM ＜ 0.5%.
When it is implemented, the die casting steel can include C, Si, Mn, Cr, Mo, V, S and Fe
On the basis of respectively further contain above-mentioned six kinds of embodiments in one kind；Also can comprising C, Si, Mn,
Further contain the first and second scheme on the basis of Cr, Mo, V, S and Fe；Also can comprising C,
On the basis of Si, Mn, Cr, Mo, V, S and Fe further containing the first, second and the third side
Case；Also can on the basis of comprising C, Si, Mn, Cr, Mo, V, S and Fe further containing the first,
Secondth, third and fourth kind scheme；Also C, Si, Mn, Cr, Mo, V, S and Fe can included
On the basis of further containing the first, second, the third, the 4th kind and fifth version；Can also be
Comprising on the basis of C, Si, Mn, Cr, Mo, V, S and Fe further containing the first, second,
The third, the 4th kind, the 5th kind and the 6th kind of scheme.
It is exemplified below the concrete composition that specific embodiment illustrates the die casting steel of the present invention.
The die casting is respectively with the mass percent of each composition in the first embodiment of steel：0.37%C,
0.9%Si, 0.44%Mn, 5.31%Cr, 1.2%Mo, 0.86%V, 0.032%S, surplus are Fe and can not
The impurity avoided.
The die casting is respectively with the mass percent of each composition in the second embodiment of steel：0.38%C,
0.91%Si, 0.46%Mn, 5.32%Cr, 1.23%Mo, 0.85%V, 0.103%S, surplus is for Fe and not
Evitable impurity.
The die casting is respectively with the mass percent of each composition in the 3rd embodiment of steel：0.39%C,
0.89%Si, 0.44%Mn, 5.29%Cr, 1.21%Mo, 0.85%V, 0.137%S, surplus is for Fe and not
Evitable impurity.
The die casting is respectively with the mass percent of each composition in the fourth embodiment of steel：0.38%C,
0.88%Si, 0.46%Mn, 5.29%Cr, 1.20%Mo, 0.85%V, 0.035%S, 0.0016%Ca, it is remaining
Measure as Fe and inevitable impurity.
The die casting is respectively with the mass percent of each composition in the 5th embodiment of steel：0.37%C,
0.90%Si, 0.45%Mn, 5.30%Cr, 1.23%Mo, 0.86%V, 0.035%S, 2.08%Ni, surplus
For Fe and inevitable impurity.
The die casting is respectively with the mass percent of each composition in the sixth embodiment of steel：0.39%C,
0.91%Si, 0.44%Mn, 5.33%Cr, 1.21%Mo, 0.86%V, 0.037%S, 1.28%Nb, surplus
For Fe and inevitable impurity.
The die casting is respectively with the mass percent of each composition in the 7th embodiment of steel：0.38%C,
0.90%Si, 0.45%Mn, 5.32%Cr, 1.22%Mo, 0.85%V, 0.034%S, 2.6%Ta, surplus
For Fe and inevitable impurity.
The die casting is respectively with the mass percent of each composition in the 8th embodiment of steel：0.39%C,
0.89%Si, 0.46%Mn, 5.29%Cr, 1.20%Mo, 0.84%V, 0.036%S, 0.006%B, surplus
For Fe and inevitable impurity.
The die casting is respectively with the mass percent of each composition in the 9th embodiment of steel：0.37%C,
0.92%Si, 0.45%Mn, 5.31%Cr, 1.21%Mo, 0.84%V, 0.034%S, 0.0011%Ca, 0.52%Ni,
2.4W, 0.05Nb, 0.003B, surplus are Fe and inevitable impurity.
The die casting is respectively with the mass percent of each composition in the tenth embodiment of steel：0.40%C,
0.34%Si, 0.33%Mn, 4.43%Cr, 0.40%Mo, 4.19W, 2.02%V, 4.04%Co, 0.039%S,
0.85%Cu, surplus is Fe and inevitable impurity.
The die casting is respectively with the mass percent of each composition in the 11st embodiment of steel：0.40%C,
0.09%Si, 0.33%Mn, 4.46%Cr, 0.39%Mo, 4.20W, 2.03%V, 4.02%Co, 0.040%S,
0.15%REM, surplus is Fe and inevitable impurity.
The die casting is respectively with the mass percent of each composition in the 11st embodiment of steel：0.41%C,
0.34%Si, 0.31%Mn, 4.46%Cr, 0.40%Mo, 4.19W, 2.04%V, 4.02%Co, 0.040%S,
0.08%Zr, 0.26%Ni, 3.3%Ta, 0.007%B, 0.08%REM, surplus are Fe and inevitable
Impurity.
The die casting has higher intensity with steel, and resistance to aluminium corrosion can effectively extend the service life of product,
Ensure the requirement of product service precision for a long time.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in this hair
Within bright spirit and principle, any modification, equivalent substitution and improvements made etc. should be included in this hair
Within bright protection domain.
Claims (10)
1. a kind of die casting steel, it is characterised in that：Including the mass percent of each composition be respectively：
0.1% ＜ C ＜ 0.5%, Si ＜ 2%, Mn ＜ 3%, 3% ＜ Cr ＜ 15%, Mo ＜ 8%, V ＜ 3%, 0.03%
＜ S ＜ 0.15%, surplus is Fe and inevitable impurity.
2. die casting steel as claimed in claim 1, it is characterised in that：The die casting steel into
It is one or both of 0.003% ＜ Ca ＜ 0.2% and Zr ＜ 0.2%, surplus also to include mass percent in point
For Fe and inevitable impurity.
3. die casting steel as claimed in claim 1 or 2, it is characterised in that：The die casting steel
Composition in also to include mass percent be at least one of Ni=4%, Cu ＜ 3%, Co ＜ 15%, surplus
For Fe and inevitable impurity.
4. die casting steel as claimed in claim 1, it is characterised in that：The die casting steel into
It is W ＜ 5% also to include mass percent in point, and surplus is Fe and inevitable impurity.
5. die casting steel as claimed in claim 1, it is characterised in that：The die casting steel into
It is one or both of 0.003% ＜ Ca ＜ 0.2% and Zr ＜ 0.2% also to include mass percent in point,
At least one of Ni=4%, Cu ＜ 3%, Co ＜ 15%, and W ＜ 5%, surplus are Fe and can not kept away
The impurity exempted from.
6. die casting steel as claimed in claim 1, it is characterised in that：The die casting steel into
It is at least one of Nb=2%, Ti=2%, Ta ＜ 4%, AI ＜ 1% also to include mass percent in point, remaining
Measure as Fe and inevitable impurity.
7. die casting steel as claimed in claim 1, it is characterised in that：The die casting steel into
It is one or both of 0.003% ＜ Ca ＜ 0.2% and Zr ＜ 0.2% also to include mass percent in point,
At least one of Ni=4%, Cu ＜ 3%, Co ＜ 15%, and W ＜ 5%, and Nb=2%, Ti=2%,
At least one of Ta ＜ 4%, AI ＜ 1%, surplus are Fe and inevitable impurity.
8. die casting steel as claimed in claim 1, it is characterised in that：The die casting steel into
It is B ＜ 0.01% also to include mass percent in point, and surplus is Fe and inevitable impurity.
9. die casting steel as claimed in claim 1, it is characterised in that：The die casting steel into
It is one or both of 0.003% ＜ Ca ＜ 0.2% and Zr ＜ 0.2% also to include mass percent in point,
At least one of Ni=4%, Cu ＜ 3%, Co ＜ 15%, and W ＜ 5%, and Nb=2%, Ti=2%,
At least one of Ta ＜ 4%, AI ＜ 1%, and B ＜ 0.01%, surplus are Fe and inevitable impurity.
10. the die casting steel as described in claim 1 or 9, it is characterised in that：The die casting is used
It is REM ＜ 0.5% also to include mass percent in the composition of steel, and surplus is Fe and inevitable impurity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610281766.0A CN107326294A (en) | 2016-04-29 | 2016-04-29 | Die casting steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610281766.0A CN107326294A (en) | 2016-04-29 | 2016-04-29 | Die casting steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107326294A true CN107326294A (en) | 2017-11-07 |
Family
ID=60192482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610281766.0A Pending CN107326294A (en) | 2016-04-29 | 2016-04-29 | Die casting steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107326294A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109136770A (en) * | 2018-10-18 | 2019-01-04 | 西安交通大学 | A kind of Smelting magnesium high-chromium alloy steel crucible and preparation method thereof |
| CN110423955A (en) * | 2019-07-29 | 2019-11-08 | 中国航发北京航空材料研究院 | The heat-resisting gear-bearing steel of the super constrictive type superhigh intensity in surface layer and preparation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1033846A (en) * | 1988-12-14 | 1989-07-12 | 湖南省冶金材料研究所 | High strength toughness mould steel |
| JP2002060845A (en) * | 2000-08-09 | 2002-02-28 | Yamanashi Prefecture | Method for prolonging service life of die casting die |
| CN101240400A (en) * | 2008-03-05 | 2008-08-13 | 钢铁研究总院 | Low-cost hot working die steel |
| CN101403071A (en) * | 2008-11-06 | 2009-04-08 | 徐宏亮 | High-alloy hot work steel and producing method thereof |
| CN101798661A (en) * | 2010-04-23 | 2010-08-11 | 庄龙兴 | Hot working die steel and preparation method thereof |
| CN102703835A (en) * | 2012-01-19 | 2012-10-03 | 刘仕爽 | Hot-work die steel for aluminum die-casting mould |
| CN103334061A (en) * | 2013-06-18 | 2013-10-02 | 上海大学 | Die-casting die steel with high heat conductivity and large section and preparation and heat treatment method thereof |
| CN104178694A (en) * | 2014-08-13 | 2014-12-03 | 上海恺虹实业有限公司 | Long-service life hot work die steel |
| CN105132811A (en) * | 2014-05-27 | 2015-12-09 | 宝钢特钢有限公司 | Die steel with strong heat stability, and preparation method thereof |
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2016
- 2016-04-29 CN CN201610281766.0A patent/CN107326294A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1033846A (en) * | 1988-12-14 | 1989-07-12 | 湖南省冶金材料研究所 | High strength toughness mould steel |
| JP2002060845A (en) * | 2000-08-09 | 2002-02-28 | Yamanashi Prefecture | Method for prolonging service life of die casting die |
| CN101240400A (en) * | 2008-03-05 | 2008-08-13 | 钢铁研究总院 | Low-cost hot working die steel |
| CN101403071A (en) * | 2008-11-06 | 2009-04-08 | 徐宏亮 | High-alloy hot work steel and producing method thereof |
| CN101798661A (en) * | 2010-04-23 | 2010-08-11 | 庄龙兴 | Hot working die steel and preparation method thereof |
| CN102703835A (en) * | 2012-01-19 | 2012-10-03 | 刘仕爽 | Hot-work die steel for aluminum die-casting mould |
| CN103334061A (en) * | 2013-06-18 | 2013-10-02 | 上海大学 | Die-casting die steel with high heat conductivity and large section and preparation and heat treatment method thereof |
| CN105132811A (en) * | 2014-05-27 | 2015-12-09 | 宝钢特钢有限公司 | Die steel with strong heat stability, and preparation method thereof |
| CN104178694A (en) * | 2014-08-13 | 2014-12-03 | 上海恺虹实业有限公司 | Long-service life hot work die steel |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109136770A (en) * | 2018-10-18 | 2019-01-04 | 西安交通大学 | A kind of Smelting magnesium high-chromium alloy steel crucible and preparation method thereof |
| CN110423955A (en) * | 2019-07-29 | 2019-11-08 | 中国航发北京航空材料研究院 | The heat-resisting gear-bearing steel of the super constrictive type superhigh intensity in surface layer and preparation method |
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Application publication date: 20171107 |