CN102703835A - Hot-work die steel for aluminum die-casting mould - Google Patents
Hot-work die steel for aluminum die-casting mould Download PDFInfo
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- CN102703835A CN102703835A CN2012100203492A CN201210020349A CN102703835A CN 102703835 A CN102703835 A CN 102703835A CN 2012100203492 A CN2012100203492 A CN 2012100203492A CN 201210020349 A CN201210020349 A CN 201210020349A CN 102703835 A CN102703835 A CN 102703835A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 48
- 239000010959 steel Substances 0.000 title claims abstract description 48
- 229910052782 aluminium Inorganic materials 0.000 title description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title description 11
- 238000004512 die casting Methods 0.000 title description 10
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 17
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 17
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 16
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 13
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 10
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 6
- 229910052720 vanadium Inorganic materials 0.000 abstract description 10
- 229910052748 manganese Inorganic materials 0.000 abstract description 9
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 239000011651 chromium Substances 0.000 description 18
- 208000037656 Respiratory Sounds Diseases 0.000 description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 11
- 239000010955 niobium Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 239000004411 aluminium Substances 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
- 238000005336 cracking Methods 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005496 tempering Methods 0.000 description 3
- 230000008646 thermal stress Effects 0.000 description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 230000009931 harmful effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- QIJNJJZPYXGIQM-UHFFFAOYSA-N 1lambda4,2lambda4-dimolybdacyclopropa-1,2,3-triene Chemical compound [Mo]=C=[Mo] QIJNJJZPYXGIQM-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910039444 MoC Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000003483 aging Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses a hot-work die steel. The hot-work die steel consists of the following components in percentage by weight: 0.30 to 0.50 percent of C, 0.80 to 1.20 percent of Si, 1.50 to 1.70 percent of Mn, 4.50 to 5.50 percent of Cr, 1.60 to 2.00 percent of W, 0.10 to 0.30 percent of Mo, 1.60 to 1.80 percent of V, 1.20 to 1.60 percent of Ni, 0.2 to 0.4 percent of Co, 0.5 to 0.7 percent of Nb, less than or equal to 0.05 percent of S, less than or equal to 0.03 percent of P and the balance of Fe.
Description
Technical field
The present invention relates to ferrous metallurgy technology, particularly a kind of hot-work die steel.
Background technology
As the aluminium die casting, the current problem that cracks (hot tearing) because of thermal fatigue in cavity surface that always exists.This hot tearing is meant following phenomenon: after the die sinking during to cavity surface cast water coolant; Because the temperature head between the cool quickly of cavity surface and the inside of heated condition; Can produce tensile stress in cavity surface, crack in cavity surface owing to the thermal fatigue that causes by this repetitive process.For this hot tearing, the hardness that improves mould is favourable.
On the other hand, in recent years, people require to shorten the manufacturing cycle (high circulationization) of aluminum die-cast product.In order to realize this requirement, with the matched moulds time that shortens mould be purpose, strengthen water-cooled gradually to the aluminum cast product in the mould.The reinforcement of this water-cooled specifically, is carried out near cavity surface through making the water-cooled hole.Produce following problem under this situation: the thermal stresses that produces at the water-cooled hole surface during aluminum products casting increases, and can produce the phenomenon that begins to crack from the water-cooled hole.
This crackle that begins from the water-cooled hole not merely is because the thermal stresses that casting the time loads repeatedly causes, but the compound delayed fracture phenomenon of crackle that causes by thermal stresses and the stress corrosion cracking that causes by the corrosion that produces at the water-cooled hole surface.
The crackle that should begin from the water-cooled hole, the hardness of mould is high more to be taken place more easily.Therefore, for this crackle that begins from the water-cooled hole, the hardness that reduces mould is favourable.
That is to say, if improve mould hardness, be favourable for hot tearing then; But for the crackle that begins from the water-cooled hole is disadvantageous, on the contrary, if reduce mould hardness; Be favourable then for the crackle that begins from the water-cooled hole; On the other hand, be disadvantageous for hot tearing, hot-cracking resistance can worsen.
From suppressing the angle of the above-mentioned crackle that begins from the water-cooled hole, preferably making mould hardness is HRC45～40.
As existing aluminium die casting, mainly use the 5Cr class hot-work die steel as representative with JIS-SKD61.In the last few years, in order to be suppressed at the hot tearing that cavity surface produces, make it use hardness to improve gradually, along with the height circulationization of the manufacturing of aluminum die-cast product, the danger that the crackle that begins from mould water-cooled hole brings increases gradually.Under the situation of above-mentioned JIS-SKD61, contain about 0.4% C, the hardness under as-quenched condition for example is about HRC53.
Therefore, be less than or equal to HRC45, need carry out more than or equal to the annealing under 600 ℃ the high temperature in order its hardness to be reduced to from the purpose of the crackle that suppresses to begin from the water-cooled hole.But,, then can significantly reduce the erosion resistance of steel if carry out the annealing under this high temperature.
This material contains about 5% Cr, and it was the good material of erosion resistance originally.But if under more than or equal to 600 ℃ high temperature, anneal, the Cr that is then contained nearly all separates out as the Cr carbide because of this high tempering, and the Cr that contains in the steel resists not effect of corrosive raising.
In any case, use at present mainly as the aluminium die casting use with the hot-work die steel of JIS-SKD61 as representative, can not solve the crack problem that begins from the water-cooled hole well.For the crack problem that begins from the water-cooled hole and the hot tearing problem of cavity surface are all solved well; Consider that following method is effective: when preventing the corrosion that in the water-cooled hole, produces, reduce the hardness of the mould inside that has the water-cooled hole, improve the hardness of the cavity surface of the mould that produces hot tearing on the other hand.But, satisfy also no one's proposition of material of this specific character.
Summary of the invention
To the deficiency of prior art, one of the object of the invention is to provide a kind of hot-work die steel, and this hot-work die steel has good hot-cracking resistance, and can suppress the crackle that begins from the water-cooled hole well.
For realizing above-mentioned purpose, the technical scheme that the present invention adopts is following:
A kind of hot-work die steel, this hot-work die steel is made up of following component in per-cent (weight): C 0.30～0.50%, and Si 0.80～1.20%, and Mn 1.50～1.70%; Cr 4.50～5.50%, and W 1.60～2.00%, and Mo 0.10～0.30%, and V 1.60～1.80%; Ni 1.20～1.60%, Co0.2～0.4%, and Nb 0.5～0.7%; S≤0.005%, P≤0.03%, its surplus is Fe.
Preferably, this hot-work die steel is made up of following component in per-cent (weight): C 0.35～0.45%, and Si 0.90～1.10%, and Mn 1.55～1.65%; Cr 4.80～5.20%, and W 1.70～1.90%, and Mo 0.15～0.25%, and V 1.65～1.75%; Ni 1.30～1.50%, and Co 0.25～0.35%, and Nb 0.55～0.65%; S≤0.005%, P≤0.03%, its surplus is Fe.
Most preferably, this hot-work die steel is made up of following component in per-cent (weight): C 0.40%, and Si 1.0%, and Mn 1.60%, and Cr 5.0%; W 1.80%, and Mo 0.20%, and V 1.70%, and Ni 1.40%, and Co 0.30%; Nb 0.60%, S≤0.005%, and P≤0.03%, its surplus is Fe.
What the main composition range of a kind of hot-work die steel of the present invention was confirmed the reasons are as follows:
C: being the key factor of control martensite intensity, also is to influence the flexible principal element.
Si: the adding of silicon can improve the hardening capacity and the matrix strength of steel.Silicon is dissolved among α-Fe, and it is strengthened, and improves transition temperature and the high-temperature oxidation resistance that α-Fe changes r-Fe.Silicon is to be insoluble to carbide, but separates out the dispersity of alloy carbide can improve tempering the time; Recent research shows: add the toughness that an amount of silicon can improve steel, the results showed, the silicon amount generally is advisable with 0.8-1.2%.
Mn:, can also eliminate the harmful effect of sulphur except improving the hardening capacity.Its content generally is controlled at 1.5-1.7%.
Chromium Cr: chromium forms carbide, can improve the hardening capacity of steel.Chromium is dissolved in austenite when quenching heating, quenches the back solid solution in martensite, can improve the anti-tempering ability of steel.The results showed that the Cr amount generally is advisable with 4.50～5.50% among the present invention.
W and Mo: in the hot-work die steel that is added in polynary composite alloying of tungsten, can reduce the thermo-responsive tendency of mistake of steel significantly, and improve the thermostability of steel.But the content of tungsten surpasses 2.0%, and the heat resistance of steel is not had obvious raising again, and toughness is descended.The adding of molybdenum can improve the hardening capacity and the heat resistance of steel, can prevent temper brittleness again.But molybdenum adds too much, can cause the molybdenum carbide segregation, in drawing process, is needle-like or netted separating out along crystal boundary, influences the toughness of steel.
V: vanadium can reduce the thermo-responsive tendency of mistake of steel.
Ni: nickel is non-carbon cpd forming element, can improve the hardening capacity of steel.To the strength and toughness of steel, good action is arranged all.
Co and Nb: niobium can form the very high NbC of stability, has just begun to dissolve in the austenite at 1050 ℃, therefore suppresses grain growth, can improve heat resistance and H.T..The adding of cobalt can significantly improve scale resistance and red hardness (wear resisting property is good).
S and P:, belong to the element that as far as possible is controlled at few content range by the harmful element that starting material are brought into.
Beneficial effect of the present invention is:
Hot-work die steel of the present invention has carried out optimization design to chemical ingredients; Reduced the content of C, adjusted the content of W, Cr, Mo, Co, can suppress the crackle that begins from the water-cooled hole when using thus effectively as pressure cast pattern; In addition, also give good hot-cracking resistance to this die casting.Hot die steel for die-casting of the present invention is suitable for using as the aluminium die casting die material especially.This is because the present invention is in the low-temperaturetempering that is less than or equal to 500 ℃, obtains being difficult for taking place the hardness that is less than or equal to HRC45 of the crackle that begins from the water-cooled hole.In addition, the content through adjustment W, Cr, Mo, Co when using as die casting, can be used to the heat of the molten metal (for example molten aluminum) when die casting, makes mold cavity surface hardening partly.That is to say that hot die steel for die-casting of the present invention has following effect: the hardness of cavity surface is utilized age hardening and is improved in mould uses.Utilize this effect, can suppress the hot tearing on the cavity surface well.
Embodiment
Embodiment one
A kind of hot-work die steel, this hot-work die steel is made up of following component in per-cent (weight): C 0.30%, and Si 1.20%, and Mn 1.50%; Cr 5.50%, and W 1.60%, and Mo 0.30%, and V 1.60%; Ni 1.60%, and Co 0.2%, and Nb 0.7%; S≤0.005%, P≤0.03%, its surplus is Fe.
Embodiment two
A kind of hot-work die steel, this hot-work die steel is made up of following component in per-cent (weight): C 0.50%, and Si 0.80%, and Mn 1.70%; Cr 4.50%, and W 2.00%, and Mo 0.10%, and V 1.80%; Ni 1.20%, and Co 0.4%, and Nb 0.5%; S≤0.005%, P≤0.03%, its surplus is Fe.
Embodiment three
A kind of hot-work die steel, this hot-work die steel is made up of following component in per-cent (weight): C 0.35%, and Si 1.10%, and Mn 1.55%; Cr 5.20%, and W 1.70%, and Mo 0.25%, and V 1.65%; Ni 1.50%, and Co 0.25%, and Nb 0.65%; S≤0.005%, P≤0.03%, its surplus is Fe.
Embodiment four
A kind of hot-work die steel, this hot-work die steel is made up of following component in per-cent (weight): C 0.45%, and Si 0.90%, and Mn 1.65%; Cr 4.80%, and W 1.90%, and Mo 0.15%, and V 1.75%; Ni 1.30%, and Co 0.35%, and Nb 0.55%; S≤0.005%, P≤0.03%, its surplus is Fe.
Embodiment five
A kind of hot-work die steel, this hot-work die steel is made up of following component in per-cent (weight): C 0.40%, and Si 1.0%, and Mn 1.60%; Cr 5.0%, and W 1.8%, and Mo 0.20%, and V 1.7%; Ni 1.4%, and Co 0.3%, and Nb 0.6%; S≤0.005%, P≤0.03%, its surplus is Fe.
Applicant's statement; The present invention explains detailed process equipment of the present invention and technical process through the foregoing description; But the present invention is not limited to above-mentioned detailed process equipment and technical process, does not mean that promptly the present invention must rely on above-mentioned detailed process equipment and technical process could be implemented.The person of ordinary skill in the field should understand, and to any improvement of the present invention, to the interpolation of the equivalence replacement of each raw material of product of the present invention and ancillary component, the selection of concrete mode etc., all drops within protection scope of the present invention and the open scope.
Claims (3)
1. a hot-work die steel is characterized in that, this hot-work die steel is made up of following component in per-cent (weight): C 0.30～0.50%, and Si 0.80～1.20%; Mn 1.50～1.70%, and Cr 4.50～5.50%, and W 1.60～2.00%, and Mo 0.10～0.30%; V 1.60～1.80%, and Ni 1.20～1.60%, and Co 0.2～0.4%, and Nb 0.5～0.7%; S≤0.005%, P≤0.03%, its surplus is Fe.
2. a kind of hot-work die steel as claimed in claim 1 is characterized in that, this hot-work die steel is made up of following component in per-cent (weight): C 0.35～0.45%, and Si 0.90～1.10%; Mn 1.55～1.65%, and Cr 4.80～5.20%, and W 1.70～1.90%, and Mo 0.15～0.25%; V 1.65～1.75%, and Ni 1.30～1.50%, and Co 0.25～0.35%, and Nb 0.55～0.65%; S≤0.005%, P≤0.03%, its surplus is Fe.
3. a kind of hot-work die steel as claimed in claim 2 is characterized in that, this hot-work die steel is made up of following component in per-cent (weight): C 0.40%, and Si 1.0%; Mn 1.60%, and Cr 5.0%, and W 1.80%, and Mo 0.20%; V 1.70%, and Ni 1.40%, and Co 0.30%, and Nb 0.60%; S≤0.005%, P≤0.03%, its surplus is Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100203492A CN102703835B (en) | 2012-01-19 | 2012-01-19 | Hot-work die steel for aluminum die-casting mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100203492A CN102703835B (en) | 2012-01-19 | 2012-01-19 | Hot-work die steel for aluminum die-casting mould |
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| Publication Number | Publication Date |
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| CN102703835A true CN102703835A (en) | 2012-10-03 |
| CN102703835B CN102703835B (en) | 2013-11-27 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105970109A (en) * | 2016-06-09 | 2016-09-28 | 广东世创金属科技股份有限公司 | High-performance hot work steel and preparation method thereof |
| CN106756654A (en) * | 2016-11-23 | 2017-05-31 | 江苏雨燕模塑有限公司 | A kind of automobile die manufacture craft |
| CN107326294A (en) * | 2016-04-29 | 2017-11-07 | 大连思泰博模具技术有限公司 | Die casting steel |
| CN108380841A (en) * | 2017-09-30 | 2018-08-10 | 湖北川冶科技有限公司 | A kind of die casting proprietary material |
| CN110055475A (en) * | 2019-04-28 | 2019-07-26 | 江苏羽立新材料科技有限公司 | A kind of roll low-phosphorous sulphur rare-earth alloy material and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1824822A (en) * | 2006-01-25 | 2006-08-30 | 周向儒 | Die steel and heat treatment technique thereof |
-
2012
- 2012-01-19 CN CN2012100203492A patent/CN102703835B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1824822A (en) * | 2006-01-25 | 2006-08-30 | 周向儒 | Die steel and heat treatment technique thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107326294A (en) * | 2016-04-29 | 2017-11-07 | 大连思泰博模具技术有限公司 | Die casting steel |
| CN105970109A (en) * | 2016-06-09 | 2016-09-28 | 广东世创金属科技股份有限公司 | High-performance hot work steel and preparation method thereof |
| CN106756654A (en) * | 2016-11-23 | 2017-05-31 | 江苏雨燕模塑有限公司 | A kind of automobile die manufacture craft |
| CN108380841A (en) * | 2017-09-30 | 2018-08-10 | 湖北川冶科技有限公司 | A kind of die casting proprietary material |
| CN110055475A (en) * | 2019-04-28 | 2019-07-26 | 江苏羽立新材料科技有限公司 | A kind of roll low-phosphorous sulphur rare-earth alloy material and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN102703835B (en) | 2013-11-27 |
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Effective date of registration: 20140530 Address after: 545006 the Guangxi Zhuang Autonomous Region Liuzhou city and the Industrial District Industrial Park, No. C-24 Patentee after: Liuzhou Fuzhen Car Body Industry Co., Ltd. Address before: Yinzhou District Lianfeng road 315175 Zhejiang city of Ningbo Province, No. 889 Patentee before: Dai Chufa |
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Granted publication date: 20131127 Termination date: 20190119 |