CN1019511B - Low-carbon low alloy steel - Google Patents
Low-carbon low alloy steelInfo
- Publication number
- CN1019511B CN1019511B CN 89107281 CN89107281A CN1019511B CN 1019511 B CN1019511 B CN 1019511B CN 89107281 CN89107281 CN 89107281 CN 89107281 A CN89107281 A CN 89107281A CN 1019511 B CN1019511 B CN 1019511B
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- China
- Prior art keywords
- low
- steel
- carbon
- alloy steel
- low alloy
- 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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- Crushing And Grinding (AREA)
Abstract
The present invention provides low-carbon low alloy steel which is quenched but not tempered, which can replace high manganese steel which is a traditional wear resistant material in China and can replace quenched and tempered medium-carbon alloy steel and high-chrome cast steel in Japan, and the performance of the low-carbon low alloy steel is obviously superior to that of the high manganese steel, the medium-carbon alloy steel and the high-chrome cast steel; ak is larger than 50 J/cm <2>, sigma b is larger than or equal to 1600 N/mm <2>, and OHRc is from 45 to 55. The low-carbon low alloy steel is characterized in that the low-carbon low alloy steel contains 2.0 to 3.5% of Mn, O1.10 to 1.45% of Si, 0.25 to 0.35% of C, at most 0.035% of P and at most O &0.035% of S. The low-carbon low alloy steel can be used as a jaw plate of a jaw crusher, a lining plate of a ball mill, a plate hammer of a backstroke crusher, etc.
Description
The invention provides a kind of through quench, the low-carbon alloy steel of temper not, can replace China's tradition high-abrasive material high mangaenese steel (Mn13), low, medium carbon low alloy steel that can replace also that Japanese Q-tempering handles and cast steel with high chromium, performance obviously is better than these steel grades (seeing Table 1), is used as jaw crusher jaw, ball grinding machine lining board and impact breaker bar.
Cast austenitic steel-high mangaenese steel (Mn13) of high-carbon Gao Meng is the wear-resisting steel grade of rock failure of domestic main application.High mangaenese steel has very high impelling strength and significant surface deformation strengthening ability, is applicable to that surface energy produces strong compression set and forms the working conditions of surface strengthen layer.But the surface deformation hardened layer of high mangaenese steel only has 0.5mm thick, and surperficial 0.1mm place hardness is Rc52(HB507), surperficial 0.5mm place hardness is Rc39(HB380), the hardness of heart portion only has (HB179-230) about Rc20.Therefore, under strong abrasive wear situation, the wear resisting property of high mangaenese steel is on duty mutually.China's mine industry reaches more than millions of tons with the annual consume of building materials industry (cement, glass, refractory materials etc.) high mangaenese steel.1985, China Cement industry consumed 290,000 tons of high-abrasive materials, was 500,000,000 yuans by at that time calculation of price.China's Cement industry equipment attrition accounts for total down-time 50～55% stop time; equipment attrition is shut down 1,400,000 tons of year minimizing cement; if the output value reaches the life-span of 1.1 hundred million yuans of high-abrasive materials and can improve 1 times, increase by 300,000,000 5 thousand ten thousand yuan of the output values (by 1985 years calculation of price) China's Cement industry year.Therefore, development and the new and effective high-abrasive material of popularization have enormous function for national economy.
The research of abrasion resistance material is the research topic that domestic and international material supply section educational circles widely payes attention to.Replace the abrasion resistance material of high mangaenese steel, mainly contain three types.First type is the high manganese steel alloy that adds chromium (Cr), molybdenum (Mo), vanadium (V), tungsten (W) or titanium alloying elements such as (Ti), and the wear resistance of this material improves than high mangaenese steel.Second type is cast steel with high chromium or rich chromium cast iron, and its carbon content is up to 1-5.5%, and chrome content reaches 13-35%.The wear resistance of this material is very high, but impelling strength is very low, and production cost is also than higher.The third type is a low alloy steel series, is main alloy element with chromium, molybdenum.This class material has wear resistance and impelling strength preferably preferably.
Analysis-by-synthesis of the present invention external all kinds of abrasion resistance materials, having developed with the most cheap alloying element manganese (2-5.5%Mn) is the wear-resisting steel grade of carbon series low alloy steel in main alloy element low.Manganese is the alloying element that significantly improves steel hardenability, but material supply section educational circles tradition thinks that the content of manganese should not surpass 2.0% in the structure iron.Tradition thinks that manganese increases temper brittleness, cold shortness and the superheated susceptivity of steel and reduces impelling strength.Next residual austenite of thinking that manganese increases in the quenching structure descends the wear resistance of steel, and these are not have manganese content to be higher than 2% major reason of carrying out the structure iron or the wear resisting steel of quench treatment in the grade of steel handbook of countries in the world.Studies show that, under the simultaneous situation of several alloying elements, the structure iron of higher manganese content has very high hardening capacity and good comprehensive mechanical performance, and the quenching low-temperaturetempering is handled and do not demonstrated temper brittleness, does not also have superheated susceptivity and low temperature brittleness.Residual austenite in the middle low carbon manganese steel mainly is present between the martensite with film like, and the surplus residual austenite of this form improves impelling strength, fracture toughness property, fatigue resistance and wear resistance.
Have in the world that day herbal classic is quenched, the low medium carbon low alloy steel of temper and cast steel with high chromium be as jaw and liner plate, the former hardening capacity and wear resistance are relatively poor, latter's impelling strength is relatively poor and cost is high.
The object of the present invention is to provide a kind of with low costly, and have higher comprehensive performance to be used for jaw crusher jaw, ball grinding machine lining board and impact breaker bar etc., through the not low-carbon low-alloy steel of temper that quenches.
Jaw crusher jaw, ball grinding machine lining board and impact breaker bar mainly are abrasive wear inefficacy and fracture failure, and impelling strength is to increase jaw, liner plate and the requisite measure in bar life-span to the wear resistance of raising material with keeping preferably.
Our studies show that (the present invention's formation) contains 2.00～3.5%Mn, 1.10～1.45%Si, 0.25～0.35%C, ≤ 0.035%P, ≤ 0.035%S, 0.80 the low-carbon low-alloy steel of～1.20%Cr or 0.20～0.40%Mo is through annealing (900 ℃), (880～900 ℃, the oil quenching) mechanical property of quenching can reach θ b 〉=1600N/mm
2, ak＞50J/cm
2, the hardness HRc45 of heart table～55.The preferential range of choice of its Mn is 2.50～3.00%.
The invention has the advantages that to have quite high wear resistance and good impelling strength, is the desirable high-abrasive material that replaces high mangaenese steel, and cheap is another significant advantage of low medium carbon manganese steel alloy.We studies show that, in the low medium carbon steel of quench treatment, the formed residual austenite of manganese mainly exists with film like residual austenite form between the thick martensite of 100A.Studies show that there is the auto-tempering phenomenon in this material in quenching process, can save artificial temper operation.Another outstanding advantage of the present invention is to have very high hardening capacity (comparing with external low alloy steel), and the hardening capacity of material can reach more than the 100mm.
Embodiment: see Table 2.
Claims (3)
1, a kind of low-carbon low-alloy steel is characterized in that containing 2.20～3.50%Mn1.10～1.45%Si, 0.25～0.35%C, and≤0.35%P ,≤0.035%S, surplus is Fe.
2, according to the described low-carbon alloy steel of claim 1, it is characterized in that containing 0.8～1.2%Cr.
3, according to the described low-carbon alloy steel of claim 1, it is characterized in that containing 0.20～0.40%Mo.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89107281 CN1019511B (en) | 1989-09-28 | 1989-09-28 | Low-carbon low alloy steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89107281 CN1019511B (en) | 1989-09-28 | 1989-09-28 | Low-carbon low alloy steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1050567A CN1050567A (en) | 1991-04-10 |
| CN1019511B true CN1019511B (en) | 1992-12-16 |
Family
ID=4857138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89107281 Expired CN1019511B (en) | 1989-09-28 | 1989-09-28 | Low-carbon low alloy steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1019511B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100436633C (en) * | 2006-10-18 | 2008-11-26 | 合肥工业大学 | Low carbon high alloy steel for ball mill lining and its making process |
| CN101684540B (en) * | 2008-09-22 | 2012-03-28 | 宝山钢铁股份有限公司 | Martensitic stainless steel with high Mn content |
| EP2370708B1 (en) * | 2008-11-28 | 2013-01-09 | Robert Bosch GmbH | Method for manufacturing a drive belt, a drive belt and a method for operating a continuously variable transmission incorporating such a drive belt |
| CN101886223B (en) * | 2010-07-09 | 2012-05-23 | 清华大学 | Method for preparing high-strength high-toughness low alloy manganese series cast steel |
| CN102555351A (en) * | 2010-12-20 | 2012-07-11 | 顾伟 | Highly wear-resisting bimetal composite material |
| CN103938100A (en) * | 2014-04-10 | 2014-07-23 | 铜陵南江鑫钢实业有限公司 | Low-temperature-resistant high-strength alloy steel material |
| CN105624570A (en) * | 2016-03-10 | 2016-06-01 | 绵阳市联合传动科技有限公司 | High-strength low-carbon alloy steel brake drum |
| CN106834936A (en) * | 2016-12-29 | 2017-06-13 | 兰州兰石集团有限公司 | Agricultural machinery deep soil loosing shovel abrasion resistant cast steel and its Technology for Heating Processing |
-
1989
- 1989-09-28 CN CN 89107281 patent/CN1019511B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1050567A (en) | 1991-04-10 |
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