CN103627960A - Wear-resistant cast steel - Google Patents
Wear-resistant cast steel Download PDFInfo
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- CN103627960A CN103627960A CN201310685176.0A CN201310685176A CN103627960A CN 103627960 A CN103627960 A CN 103627960A CN 201310685176 A CN201310685176 A CN 201310685176A CN 103627960 A CN103627960 A CN 103627960A
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Abstract
The invention discloses a wear-resistant cast steel. The invention is characterized in that the wear-resistant cast steel is composed of the following main alloy elements in percentage by mass: 0.15-0.40% of C, 0.30-0.90% of Si,1.00-2.50% of Mn,0.60-1.80% of Cr, less than 0.004% of P, less than0.003% of S and the balance of Fe. The wear-resistant cast steel has the advantages of higher hardness and higher toughness, can lower the production cost, and can be widely used in high-wear-rate workpieces, such as cutting teeth of various excavators, bucket teeth of loading machines and the like.
Description
Technical field
The invention belongs to metal material field, particularly a kind of wearable cast steel.
Background technology
Existing wearable cast steel mainly contains high mangaenese steel and low alloy steel.The maximum feature of high mangaenese steel is: initial hardness is lower, and under larger shock load or contact stress effect, upper layer can produce rapidly work hardening, inner still maintain good toughness, therefore has good wear resistance.But, in shock load or the not too high occasion of contact stress, in the short period of time, can not get sufficient work hardening, cause the antiwear characteristic of high mangaenese steel to be not in full use, thereby work-ing life is shorter.Complete processing is complicated, and manufacturing cost is high.
Adopt multi-element alloyed low alloy steel through suitable thermal treatment, can obtain high strength and high hardness and coordinate with certain toughness, wear resisting property is good.
The patent No. is disclosed a kind of cast steel in SU1650759 document, and its chemical composition is listed table 1 in.The tensile strength of this steel
σ
bbe 710～750Mpa, impelling strength a
kbe 12.5～13.8J/cm
2.This cast steel hardness is higher, and wear resistance is better, but intensity is lower, can only under medium and small shock load, work.In addition, in melting, the element such as Ca, Ce, Ba is difficult to control, and alloying element is as higher in the content of Cr etc., and its price is also more expensive.
Table 1:
The chemical composition (wt%) of cast steel (SU1650759)
Published in Chinese Patent Application No. 96119545.2 " a kind of wearable cast steel ", its chemical composition is listed table 2 in.The tensile strength sigma of this cast steel
bbe 1243～1385Mpa, impelling strength a
kbe 65.8～76.5J/cm
2, hardness 45～54HRC.
Table 2:
The chemical composition (wt%) of cast steel (96119545)
For another example published " multielement micro-alloyed air cooled bainitic steel " in Chinese Patent Application No. 97105661, its chemical composition is listed table 3 in, also can add V0.03～0.15%, Nb0.03～0.15%, Cr0.30～2.50%.Hardness >=the 50HRC of this cast steel.
Table 3:
The chemical composition (wt%) of cast steel (97105661)
| Chemical element | C | Si | Mn | B | Ti | RE | N |
| Mass percent | 0.35/0.60 | 0.20/2.00 | 2.00/3.50 | 0.0005/0.010 | 0.015/0.05 | 0.02/0.10 | 0.006/0.015 |
Yet, in number of patent application 96119545.2 " a kind of wearable cast steel ", contain Mo, V, Ti, RE alloying element, and number of patent application 97105661 " multielement micro-alloyed air cooled bainitic steel " is not though containing Alloy Elements Mo, but contain Ti and N alloying element, even contain Nb alloying element, and C, Si, Mn constituent content are higher, thereby material cost is higher.
Summary of the invention
Object of the present invention is exactly, production cost high deficiency poor for existing cast steel material wear resistance, provide a kind of with a small amount of Cr, B alloying element, do not contain the elements such as expensive Mo, V, Ti, Nb, and by stable alloying technology, obtain the wearable cast steel of excellent wear energy.
For achieving the above object, the technical solution used in the present invention is:
A wearable cast steel, is a kind of low alloy steel, and its feature, being that to take carbon, silicon, manganese, chromium be main alloy element, also contains a small amount of boron and rhenium, and the mass percent of its each alloying element is shown in table 4.After heat treatment, its microstructure is that martensite adds a small amount of residual austenite to the cast steel of this kind of composition, has good obdurability and wear resistance, and comprehensive mechanical property is better than high mangaenese steel.
Table 4:
The chemical composition of each alloying element (wt%) in a kind of wearable cast steel
| Chemical element | C | Si | Mn | Cr | B | RE | P | S |
| Mass percent | 0.15～0.40 | 0.30～0.90 | 1.00～2.50 | 0.60～1.80 | 0.003～0.02 | 0.05～0.50 | ＜0.004 | ＜0.003 |
The present invention compared with prior art has following characteristics:
1. do not use the alloying elements such as Mo, Ni, V, Ti, Nb, thereby manufacturing cost is lower.
2. wearable cast steel production technique of the present invention is simple, steady quality.
3. the comprehensive mechanical property of wearable cast steel of the present invention is better than wearable cast steel SU1650759 and high mangaenese steel, the abrasion-proof accessories life-span that adopts wearable cast steel manufacture of the present invention is high mangaenese steel 2～3 times.
The present invention can have higher Hardness and toughness, and can reduce production costs; Can be widely used in the bucket tooth of various excavators and the teeth of shovel loader etc. and need the workpiece that wear rate is high.
Embodiment
In wearable cast steel of the present invention, the restriction reason of the mass percent scope of each alloying element is described as follows:
Carbon: carbon content is chosen between 0.15～0.40%, its objective is and guaranteeing that cast steel has under the prerequisite of certain degree of hardness, has higher obdurability concurrently.For cast steel, carbon content is too high, in tissue, will produce carbide network, and causes fragility to increase; Carbon content is lower than 0.15%, and the hardness of cast steel is returned significantly and declined, thereby reduces wear resistance.
Silicon: dissolve in ferritic element silicon and play strengthening effect, be also improved the hardening capacity effect of steel.
Manganese: manganese element is the principal element that improves steel hardenability.Add-on is too much, and tissue that will alligatoring steel increases the hot cracking tendency of cast steel.
Chromium: chromium is to improve one of the most effective alloying element of hardening capacity, adds appropriate chromium in wearable cast steel, can effectively improve the hardening capacity of steel, the tissue of refinement steel, improves toughness and the wear resistance of steel.
Boron: boron fuses in austenite, the martensitic substructure of refinement, greatly increases the hardening capacity of steel, improves impelling strength and the fracture toughness property of steel.
Rare earth: rare earth can improve the purity of molten steel effectively, promotes microalloying.
Phosphorus, sulphur: p and s is impurity element in wearable cast steel of the present invention, and its content is limited in respectively below 0.004% and 0.003%.
By the wearable cast steel of the present invention of above principal element preparation, tensile strength sigma
b> 1400Mpa, unit elongation is 5%, hardness is 45～55HRC, impelling strength a
k> 30J/cm
2.
By following examples, the present invention is specifically described:
Embodiment 1
Adopt existing steel-making and foundry engieering, the chemical composition (mass percent) of controlling wearable cast steel of the present invention is: C:0.22%, Si:0.6%, Mn:1.6%, Cr:1.2%, B:0.005%, RE:0.2%, P < 0.004%, S < 0.003%, all the other are Fe.
Embodiment 2
Adopt existing steel-making and foundry engieering, the chemical composition (mass percent) of controlling wearable cast steel of the present invention is: C:0.30%, Si:0.7%, Mn:1.8%, Cr:1.2%, B:0.01%, RE:0.3%, P < 0.004%, S < 0.003%, all the other are Fe.
Using wearable cast steel of the present invention to manufacture excavator bucket teeth and shovel loader teeth, is high mangaenese steel 2～3 times work-ing life.
Claims (2)
1. a wearable cast steel, its feature is being that to take carbon, silicon, manganese, chromium be main alloy element, the mass percent of its each main alloy element is: C:0.15～0.40, Si:0.30～0.90, Mn:1.00～2.50, Cr:0.60～1.80, P < 0.004, S < 0.003, all the other are Fe.
2. according to a kind of wearable cast steel described in claims 1, it is characterized in that: in the alloying element of described wearable cast steel, also contain mass percent and be the RE that 0.003～0.02% B and mass percent are 0.05～0.50%.
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| CN201310685176.0A CN103627960A (en) | 2013-12-10 | 2013-12-10 | Wear-resistant cast steel |
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| CN201310685176.0A CN103627960A (en) | 2013-12-10 | 2013-12-10 | Wear-resistant cast steel |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104004963A (en) * | 2014-06-13 | 2014-08-27 | 哈尔滨工业大学 | Dredger reamer tooth and preparation method thereof |
| CN104328345A (en) * | 2014-11-19 | 2015-02-04 | 石家庄三环阀门股份有限公司 | Double-metal material knockout wear-resistant lining plate as well as chemical composition and processing method thereof |
| CN105349896A (en) * | 2015-10-28 | 2016-02-24 | 安徽省三方新材料科技有限公司 | Low-alloy excavator bucket tooth and preparation method thereof |
| CN105543706A (en) * | 2016-01-25 | 2016-05-04 | 太原理工大学 | High-strength high-toughness abrasion-resistant cast steel material and preparation method thereof |
| CN106148825A (en) * | 2016-09-13 | 2016-11-23 | 北京科技大学 | A kind of bullet train bainite wheel steel and preparation method |
| CN106636896A (en) * | 2016-12-05 | 2017-05-10 | 武汉钢铁股份有限公司 | High hardenability hot-rolled knife board steel |
| 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 |
| CN110373614A (en) * | 2019-08-30 | 2019-10-25 | 山东能源重装集团乾泰精密机械有限公司 | A kind of abrasion resistant cast steel and preparation method thereof |
| CN111945067A (en) * | 2020-08-05 | 2020-11-17 | 山东钢铁股份有限公司 | Wear-resistant bar with silicon content of 0.8-1.2% and preparation method thereof |
| CN114150210A (en) * | 2021-11-24 | 2022-03-08 | 北京科技大学 | Preparation method of multi-element small-amount low-alloying ledge steel casting |
| CN116377351A (en) * | 2023-04-19 | 2023-07-04 | 宁波市鄞州富春精密铸造有限公司 | High-strength wear-resistant steel casting and preparation method thereof |
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| CN101880828A (en) * | 2010-07-09 | 2010-11-10 | 清华大学 | Preparation method of low-alloy manganese martensite wear resistant cast steel |
| CN101906588A (en) * | 2010-07-09 | 2010-12-08 | 清华大学 | Preparation method for air-cooled lower bainite/martensite multi-phase wear-resistant cast steel |
| CN102517499A (en) * | 2011-12-19 | 2012-06-27 | 张家港市鼎力铸钢有限公司 | High-strength and low-cost dilute alloy wear resistant cast steel |
| CN102660712A (en) * | 2012-06-08 | 2012-09-12 | 黄凯敏 | Improved 30CrMnSi steel |
| CN102703825A (en) * | 2012-06-12 | 2012-10-03 | 唐海峰 | Preparation method of improved 30CrMnSi steel |
| CN102965582A (en) * | 2012-12-10 | 2013-03-13 | 张家港市鼎力铸钢有限公司 | Low-cost wear-resistance cast steel |
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2013
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| CN101880828A (en) * | 2010-07-09 | 2010-11-10 | 清华大学 | Preparation method of low-alloy manganese martensite wear resistant cast steel |
| CN101906588A (en) * | 2010-07-09 | 2010-12-08 | 清华大学 | Preparation method for air-cooled lower bainite/martensite multi-phase wear-resistant cast steel |
| CN102517499A (en) * | 2011-12-19 | 2012-06-27 | 张家港市鼎力铸钢有限公司 | High-strength and low-cost dilute alloy wear resistant cast steel |
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| CN102703825A (en) * | 2012-06-12 | 2012-10-03 | 唐海峰 | Preparation method of improved 30CrMnSi steel |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104004963A (en) * | 2014-06-13 | 2014-08-27 | 哈尔滨工业大学 | Dredger reamer tooth and preparation method thereof |
| CN104004963B (en) * | 2014-06-13 | 2015-12-30 | 哈尔滨工业大学 | A kind of dredging snagboat reamer tooth and preparation method thereof |
| CN104328345A (en) * | 2014-11-19 | 2015-02-04 | 石家庄三环阀门股份有限公司 | Double-metal material knockout wear-resistant lining plate as well as chemical composition and processing method thereof |
| CN104328345B (en) * | 2014-11-19 | 2016-06-15 | 石家庄三环阀门股份有限公司 | Material abrasion-proof backing block beaten by a kind of bimetal material and chemistry forms and working method |
| CN105349896A (en) * | 2015-10-28 | 2016-02-24 | 安徽省三方新材料科技有限公司 | Low-alloy excavator bucket tooth and preparation method thereof |
| CN105543706A (en) * | 2016-01-25 | 2016-05-04 | 太原理工大学 | High-strength high-toughness abrasion-resistant cast steel material and preparation method thereof |
| CN106148825A (en) * | 2016-09-13 | 2016-11-23 | 北京科技大学 | A kind of bullet train bainite wheel steel and preparation method |
| CN106148825B (en) * | 2016-09-13 | 2018-06-12 | 北京科技大学 | A kind of bullet train bainite wheel steel and preparation method |
| CN106636896A (en) * | 2016-12-05 | 2017-05-10 | 武汉钢铁股份有限公司 | High hardenability hot-rolled knife board steel |
| 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 |
| CN110373614A (en) * | 2019-08-30 | 2019-10-25 | 山东能源重装集团乾泰精密机械有限公司 | A kind of abrasion resistant cast steel and preparation method thereof |
| CN111945067A (en) * | 2020-08-05 | 2020-11-17 | 山东钢铁股份有限公司 | Wear-resistant bar with silicon content of 0.8-1.2% and preparation method thereof |
| CN114150210A (en) * | 2021-11-24 | 2022-03-08 | 北京科技大学 | Preparation method of multi-element small-amount low-alloying ledge steel casting |
| CN116377351A (en) * | 2023-04-19 | 2023-07-04 | 宁波市鄞州富春精密铸造有限公司 | High-strength wear-resistant steel casting and preparation method thereof |
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Application publication date: 20140312 |