CN1012740B - Medium alloy modified wear-resistant cast steel - Google Patents
Medium alloy modified wear-resistant cast steelInfo
- Publication number
- CN1012740B CN1012740B CN 87103727 CN87103727A CN1012740B CN 1012740 B CN1012740 B CN 1012740B CN 87103727 CN87103727 CN 87103727 CN 87103727 A CN87103727 A CN 87103727A CN 1012740 B CN1012740 B CN 1012740B
- Authority
- CN
- China
- Prior art keywords
- steel
- wear
- alloy
- cast steel
- cerium
- 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.)
- Expired
Links
- 229910001208 Crucible steel Inorganic materials 0.000 title claims abstract description 6
- 229910045601 alloy Inorganic materials 0.000 title abstract description 4
- 239000000956 alloy Substances 0.000 title abstract description 4
- 229910052684 Cerium Inorganic materials 0.000 claims abstract description 13
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims abstract description 12
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000011651 chromium Substances 0.000 claims abstract description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000011572 manganese Substances 0.000 claims abstract description 4
- 239000010703 silicon Substances 0.000 claims abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 239000005864 Sulphur Substances 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 239000011733 molybdenum Substances 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 2
- 239000011574 phosphorus Substances 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 33
- 239000010959 steel Substances 0.000 abstract description 33
- 239000013078 crystal Substances 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000009826 distribution Methods 0.000 abstract description 3
- 229910052761 rare earth metal Inorganic materials 0.000 abstract description 3
- 150000002910 rare earth metals Chemical class 0.000 abstract description 3
- 229910001182 Mo alloy Inorganic materials 0.000 abstract description 2
- 238000005266 casting Methods 0.000 abstract description 2
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 abstract description 2
- 229910000851 Alloy steel Inorganic materials 0.000 abstract 1
- 229910001339 C alloy Inorganic materials 0.000 abstract 1
- 229910000599 Cr alloy Inorganic materials 0.000 abstract 1
- 229910000914 Mn alloy Inorganic materials 0.000 abstract 1
- 229910000676 Si alloy Inorganic materials 0.000 abstract 1
- 239000003607 modifier Substances 0.000 abstract 1
- 238000005299 abrasion Methods 0.000 description 8
- 238000000227 grinding Methods 0.000 description 4
- 229910000734 martensite Inorganic materials 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005261 decarburization Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 229910000636 Ce alloy Inorganic materials 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Landscapes
- Crushing And Grinding (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Continuous Casting (AREA)
Abstract
The medium alloy wear-resisting cast steel has the advantages of wear resistance, impact resistance, high toughness, etc. It is suitable for manufacturing lining plates of large-scale ball mills.
The alloy steel adds silicon, chromium, manganese and molybdenum alloy into iron-carbon alloy, and rare earth cerium is used as modifier to refine crystal grains, change the shape and distribution of inclusions in the steel, and achieve high wear resistance. The casting of the steel grade has better manufacturability and economy than similar steels.
Description
A kind of interalloy cast steel belongs to the high abrasion steel.Be applicable to the manufacturing of ball grinding machine lining board.
The ball grinding machine lining board great majority of China are to cast with traditional high mangaenese steel, and its abrasion are very high, and nonvolatil being consumed in the polished material of iron and steel of few hundred thousand tonnes of meter arranged every year.Though the ball grinding machine lining board by external import is wear-resisting, but can not lean on the import liner plate to keep production for a long time.In view of this, Chinese building material mechanical industry company of State Bureau of Building Materials Industry assigns the new material of development large-size ball mill liner plate in nineteen eighty-three to Tangshan Cement Machinery Factory, to change standing state.Through development in 2 years and industrial examination type, determine that the trade mark is: ZG42Cr2MnSi2MoCe.Its Chemical Composition is: C0.38～0.48, and Cr1.80～2.20, Mn0.80～1.10, Si1.50～1.80, Mo0.20～0.50, Ce0.05～0.08, P, S are all smaller or equal to 0.035.
The metallographic structure after quenching and tempering of this wear resisting steel is the martensite with nodularization inclusion.Its mechanical property is: hardness HRC51-57, impelling strength ak 〉=21.6J/cm
2, tensile strength ob 〉=1373N/mm
2Be to have high rigidity, high tenacity, high wear-resistant practical new steel grade.
This wear resisting steel was once done with the contrast experiment under the working condition with the large-size ball mill liner plate that Japanese Ishikawa island heavy industry company is input to China Ji Dong cement mill, and the result is that this wear-resisting steel liner plate is more wear-resisting than Japanese kx-601 steel liner plate.When grinding equal cement, this wear resisting steel is 1.59 times of kx-601 steel liner plate wear resistance.On impact resistance, this wear resisting steel is better than Japanese cc20 and AM-1B wear resisting steel.The ak value of these two kinds of steel all is not more than 19.6J/cm
2, this wear resisting steel is than its height.
The design of the Chemical Composition of this wear resisting steel is to add silicon, chromium, manganese, molybdenum alloy in iron-carbon, and to add the proper amount of rare-earth elemental cerium be alterant, and the wear-resistant shock resistance of steel is increased.The effect in steel grade of various elements and alloy is as follows:
Carbon is the dominant element that influences rigidity, and in certain carbon content scope, carbon part is gained in strength, and hardness and wear resistance increase.When carbon content greater than 0.5 the time, the fragility of steel increases, toughness descends; When carbon content less than 0.4 the time, abrasion significantly descend, and determine that therefore carbon content is 0.38-0.48%.
Chromium can significantly improve the hardening capacity of steel, and the solution strengthening matrix improves the hardness and wear resistance of steel.When chromium content less than 1.5% the time, martensitic steel has the abrasion downward trend; When greater than 2.5% the time, can increase residual austenite abrasion are descended.So determine that its content is 1.80-2.20%.
Manganese can improve that hardening capacity is gained in strength and hardness, and desulfidation is arranged, and causes toughness to descend in order to use the unlikely grain growth that impels of manganese amount, limits content between 0.80-1.10%.
Silicon makes temper brittleness move effects such as improving intensity to high temperature, promotes decarburization but can reduce plasticity when content surpasses 2%.So quantitatively be 1.50-1.80%.
Molybdenum can improve hardening capacity and temper resistance, improves hardness and improves impelling strength, suppresses temper brittleness.Also but crystal grain thinning improves resistance to abrasion, can cause temper brittleness to increase during owing to the molybdenum too high levels and easily decarburization, so be 0.2-0.5% quantitatively.
The unusual Yu Gangzhong that is in of this wear resisting steel adds micro-cerium (Ce), and purpose is to purify the crystal boundary crystal grain thinning, changes the form and the distribution of inclusion, to improve the intensity and the wear resistance of steel.Cerium combine with sulphur the sulfide that is generated be spherical its even dispersion on matrix, changed the uneven distribution state of the sheet horn shape inclusion when not adding cerium, thereby reached rotten purpose.Owing to can produce fragility after the cerium excess, be between the 0.05-0.08% quantitatively therefore.
Sulphur, phosphorus are by the detrimental impurity of bringing steel in the raw material into, easily produce segregation and crystal boundary fragility, so its content of control is not more than 0.035%.
The tissue design of this steel grade: above-mentioned Chemical Composition is after the induction furnace melting, and the as-cast structure of steel is a coarse pearlity, is fine pearlite after annealing.Through moving back 900-940 ℃ of quenching and 230-270 ℃ of tempering, obtain lath martensite.See accompanying drawing.
Owing to add cerium in the melting later stage, make sheet horn shape inclusion englobement in the steel, as accompanying drawing.Reached the rotten conversion of estimating thus.Hardness, toughness, the wear resistance of steel are improved.
The mode that adds cerium among the ZG42Cr2MnSi2MoCe is canned pressure addition method.After the refining deoxidation cerium jar being forced to add in the molten steel eventually, fully stir simultaneously to improve the specific absorption and the distributing homogeneity of steel to cerium.Specific absorption is 50% after measured.The commodity cerium purity of using is 99.5%.Through rotten this interalloy cast steel good fluidity of handling, the microalloying effect is remarkable, and cast(ing) surface is smooth.
Fig. 1 is for adopting the lath martensite photo that is obtained after the technology of the present invention, and the spherical assorted folder thing that is uniform-distribution with in matrix is that rotten conversion of cerium generates, and photo is enlarged into 400x.
Use the foundry goods good economy performance of this abrasion-resistant stee casting, because its life-span is higher by 59% than similar foundry goods, and price only is 1/12nd of imported product.
China's rare earth resources is abundant, and it is required that cerium alloy can satisfy mass production. This abrasion-resistant stee of extensive use can be received material-saving, energy-conservation, the comprehensive benefit such as save foreign exchange, improve the quality of products.
Claims (1)
1, the rotten wearable cast steel of a kind of interalloy is characterized in that its composition (by weight percentage) is:
Carbon 0.38-0.48
Chromium 1.80-2.20
Manganese 0.80-1.10
Silicon 1.50-1.80
Molybdenum 0.20-0.50
Cerium 0.05-0.08
Sulphur, phosphorus≤0.035.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87103727 CN1012740B (en) | 1987-07-10 | 1987-07-10 | Medium alloy modified wear-resistant cast steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87103727 CN1012740B (en) | 1987-07-10 | 1987-07-10 | Medium alloy modified wear-resistant cast steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1030614A CN1030614A (en) | 1989-01-25 |
| CN1012740B true CN1012740B (en) | 1991-06-05 |
Family
ID=4814555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87103727 Expired CN1012740B (en) | 1987-07-10 | 1987-07-10 | Medium alloy modified wear-resistant cast steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1012740B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048235C (en) * | 1990-04-25 | 2000-01-12 | 株式会社竹中工务店 | Refractory covering materials |
| CN100445411C (en) * | 2006-12-31 | 2008-12-24 | 宁波市鄞州文教精密铸造厂 | Casting steel containing rare earth element and protuction process thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230140B (en) * | 2010-04-28 | 2012-11-28 | 鞍钢集团矿业公司 | Martensitic wear resistant steel production technology |
-
1987
- 1987-07-10 CN CN 87103727 patent/CN1012740B/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048235C (en) * | 1990-04-25 | 2000-01-12 | 株式会社竹中工务店 | Refractory covering materials |
| CN100445411C (en) * | 2006-12-31 | 2008-12-24 | 宁波市鄞州文教精密铸造厂 | Casting steel containing rare earth element and protuction process thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1030614A (en) | 1989-01-25 |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |