CN103556053A - Economical low-alloy wear-resisting cast steel and thermal treatment technology thereof - Google Patents
Economical low-alloy wear-resisting cast steel and thermal treatment technology thereof Download PDFInfo
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- CN103556053A CN103556053A CN201310568551.3A CN201310568551A CN103556053A CN 103556053 A CN103556053 A CN 103556053A CN 201310568551 A CN201310568551 A CN 201310568551A CN 103556053 A CN103556053 A CN 103556053A
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Abstract
The invention discloses economical low-alloy wear-resisting cast steel. The economical low-alloy wear-resisting cast steel comprises the following components in percentage by mass: 0.10-0.30% of C, 0.5-1.5% of Mn, 0.3-1.0% of Ni, 0.01-0.05% of Nb, less than or equal to 0.5% of Si, less than or equal to 0.03% of P, less than or equal to 0.03% of S and the balance of Fe and inevitable impurities. The cast steel has good tensile strength, the room temperature tensile strength of the cast alloy is greater than 540Mpa, and the elongation percentage of the cast alloy is greater than 20%. The cast steel is mainly applied to the field of mining machinery, long in service life, an engineering material with the cost-effectiveness and the optimal candidate material for replacing import cast steel of the same kind.
Description
Technical field
The present invention relates to a kind of abrasion-resistant cast steel material of economical high-performance, belong to steel alloy material technical field.
Background technology
Low-alloy cast steel occupies very important proportion in the development and application field of wearable cast steel.The alloy ingredient total amount of low-alloy cast steel is generally below 5%.It mainly adds alloying element and comprises manganese, silicon, chromium, molybdenum, nickel and niobium etc., and the main order that adds of these alloying elements is to improve intensity, toughness, hardening capacity and the wear resistance thereof of steel.Low-alloy cast steel is divided into low-carbon (LC), middle carbon and high-carbon low-alloy cast steel by carbon content difference.By tissue morphology, can be divided into low-carbon and low-alloy ferritic-pearlitic type cast steel, dilute-alloy martensite type cast steel, low-alloy bainite type cast steel, dilute-alloy martensite/bainite type cast steel.The research of China's low-alloy wear-resistant steel is started late, initial only for the manufacture of the wear piece that bears certain impact load.Afterwards, along with going deep into gradually that people are familiar with high mangaenese steel defect, the research of low-alloy wear-resistant steel and application are paid attention to more, Application Areas constantly expands.The low-alloy wear-resistant steel of China by Si, Mn steel add Cr, Mo grows up.Its reason is that the silicomanganese resource of China is very abundant, also more deep to the research of the silicomanganese mechanism of action.At present, low-alloy abrasion-proof steel grade mainly contains Low-Alloy Martensitic Cast Steel and wear-resistant bainite cast steel both at home and abroad.
Cantilever on development machine in China's mining machinery application is the main crucial consumable accessory of development machine; under the environment often impacting in bulk mining splash, work; because of the scraping loss of hanging oneself from a beam surperficial; running through certain hour; overarm surface abrasion is excessive; easily cause overarm fracture, shutdown can cause equipment breakdown not in time.To consume a large amount of steel castings every year for this reason, wherein also comprise and cause economically a large amount of consumption by some Imported foundry goods.How to improve the tensile strength of mining machinery steel casting, increasing the service life with rational manufacturing cost is China scientific research personnel urgent problem.
Summary of the invention
The object of the present invention is to provide a kind of good tensile strength that has, long service life, the rational economical low-alloy wear-resistant steel of manufacturing cost and thermal treatment process thereof.
A low-alloy wear-resistant steel, is characterized in that having following composition and mass percent: C:0.10-0.30%, Mn:0.5-1.5%, Ni:0.3-1.0%, Nb:0.01-0.05%, Si≤0.5%, P≤0.03%, S≤0.03%, surplus is Fe and inevitable impurity.
Its room temperature texture is ferrite and pearlite, and pearlitic content is 20-30%.
Its room temperature tensile strength is 540-580 MPa, and elongation is more than 20%.
A thermal treatment process for economical low-alloy wear-resistant steel, adopts the conventional smelting process of tradition, through batching melting, and after cast molding, then through 850-900 ℃ of normalizing and 560-620 ℃ of temper.
Mechanism of the present invention is as described below: manganese element belongs to one of aboundresources mineral products in China, and in the smelting process of steel, manganese has the effect of deoxidation; Manganese is in the above solid solution of austenitizing temperature in austenite, and air cooling is time part solid solution strengthening effect in ferrite to room temperature, and another part forms to be present in containing manganese alloy cementite (Fe, Mn) 3C also certain strengthening effect in perlite.Nickel is one of main alloy element of stabilization of austenite.In steel, add a certain amount of nickel can improve the intensity of steel, and do not reduce plasticity; Nickel itself has certain solidity to corrosion simultaneously.Niobium is typical micro alloying element, has refined crystalline strengthening and precipitation strength effect in steel.Their optimum combination is the basis of guaranteeing the good cost performance of material.
The present invention compared with prior art has following beneficial effect:
The present invention has good tensile strength, and its room temperature tensile strength is greater than 540 MPa, and elongation is greater than 20%; Be mainly used in mining machinery field, long service life, is to have cost-benefit engineering materials, replaces the optimal candidate material of similar import steel casting.
Accompanying drawing explanation
Fig. 1 is the metallurgical microstructrue photo after embodiment of the present invention thermal treatment.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
A low-alloy wear-resistant steel, is characterized in that having following composition and mass percent: Cr 0.23%, and Ni 0.37%, and Mn 0.91%, and Si 0.41%, and S 0.005%, and P 0.005%, Fe surplus.
Adopt the conventional smelting process of tradition, through comprehensive metering, calculate and prepare burden after melting, cast molding, makes cast steel foundry goods, then after 900 ℃ of normalizing treatment and 560 ℃ of temper, obtains good metallurgical microstructrue.Its room temperature tensile strength is greater than 540 MPa, and elongation is greater than 20%.This economical low-alloy wear-resistant steel is a kind of cost-benefit engineering materials that has, and is mainly used in mining machinery field, is the optimal candidate material of replacing similar import steel casting.
Embodiment is just for the ease of understanding technical scheme of the present invention; do not form limiting the scope of the invention; every interior any simple modification, equivalent variations and modification of perhaps according to technical spirit of the present invention, above scheme being done that does not depart from technical solution of the present invention, within all still belonging to protection domain of the present invention.
Claims (4)
1. an economical low-alloy wear-resistant steel, is characterized in that having following composition and mass percent: C:0.10-0.30%, Mn:0.5-1.5%, Ni:0.3-1.0%, Nb:0.01-0.05%, Si≤0.5%, P≤0.03%, S≤0.03%, surplus is Fe and inevitable impurity.
2. a kind of economical low-alloy wear-resistant steel according to claim 1, it is characterized in that: its room temperature texture is ferrite and pearlite, and pearlitic content is 20-30%.
3. a kind of economical low-alloy wear-resistant steel according to claim 2, is characterized in that: its room temperature tensile strength is 540-580 MPa, and elongation is more than 20%.
4. according to the thermal treatment process of a kind of economical low-alloy wear-resistant steel described in claim 1,2 or 3, it is characterized in that: adopt the conventional smelting process of tradition, through batching melting, after cast molding, then through 850-900 ℃ of normalizing and 560-620 ℃ of temper.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310568551.3A CN103556053A (en) | 2013-11-15 | 2013-11-15 | Economical low-alloy wear-resisting cast steel and thermal treatment technology thereof |
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| CN201310568551.3A CN103556053A (en) | 2013-11-15 | 2013-11-15 | Economical low-alloy wear-resisting cast steel and thermal treatment technology thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104046893A (en) * | 2014-06-18 | 2014-09-17 | 上海大学 | Low-alloy wear-resisting cast steel material and preparation method thereof |
| CN104404366A (en) * | 2014-12-08 | 2015-03-11 | 安徽省安工机械制造有限公司 | Formula and production process for high strength-toughness traction bar bracket steel casting |
| CN106011668A (en) * | 2016-06-30 | 2016-10-12 | 中车戚墅堰机车车辆工艺研究所有限公司 | Low alloy cast steel, heat treatment method thereof and application of low alloy cast steel in railway industries |
| CN114480978A (en) * | 2022-01-11 | 2022-05-13 | 中国船舶重工集团公司第七二五研究所 | Non-quenched and tempered microalloy cast steel and heat treatment method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102154595A (en) * | 2011-03-25 | 2011-08-17 | 上海大学 | Low-alloy abrasion-resistant cast steel for coal-machine working condition |
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2013
- 2013-11-15 CN CN201310568551.3A patent/CN103556053A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102154595A (en) * | 2011-03-25 | 2011-08-17 | 上海大学 | Low-alloy abrasion-resistant cast steel for coal-machine working condition |
Non-Patent Citations (2)
| Title |
|---|
| 中华人民共和国铁道部: "铁道货车铸钢摇枕、侧架技术条件", 《中华人民共和国铁道行业标准TB/T 3012-2006》, 10 April 2006 (2006-04-10) * |
| 胡志军等: "热处理工艺对低合金耐磨铸钢组织和性能的影响", 《铸造技术》, vol. 33, no. 6, 30 June 2012 (2012-06-30) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104046893A (en) * | 2014-06-18 | 2014-09-17 | 上海大学 | Low-alloy wear-resisting cast steel material and preparation method thereof |
| CN104404366A (en) * | 2014-12-08 | 2015-03-11 | 安徽省安工机械制造有限公司 | Formula and production process for high strength-toughness traction bar bracket steel casting |
| CN106011668A (en) * | 2016-06-30 | 2016-10-12 | 中车戚墅堰机车车辆工艺研究所有限公司 | Low alloy cast steel, heat treatment method thereof and application of low alloy cast steel in railway industries |
| CN114480978A (en) * | 2022-01-11 | 2022-05-13 | 中国船舶重工集团公司第七二五研究所 | Non-quenched and tempered microalloy cast steel and heat treatment method thereof |
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Application publication date: 20140205 |