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Steel for excavator bucket teeth and preparation method of steel

A technology of excavator bucket teeth and components, which is applied in the field of materials, can solve the problems of poor hardness and impact resistance, poor wear resistance, and short service life of excavator bucket teeth.

Pending Publication Date: 2020-10-02
安徽中建材开源新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hardness and impact resistance of the existing steel for bucket teeth are still not very good, the wear resistance is not good, and the overall service life of the excavator bucket teeth is short

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of steel for bucket teeth of excavator, its composition includes by weight percentage: C: 1.84%, Cr: 12%, Si: 0.9%, Ti: 0.3%, Mn: 1%, Ni: 0.71%, Nb: 0.2 %, Mo: 1%, V: 0.12%, W: 0.15%, Zr: 0.005%, RE: 0.018%, B: 0.0015%, and the balance is Fe and unavoidable impurities.

[0020] A preparation method of steel for excavator bucket teeth, comprising the following steps:

[0021] S1, smelting raw materials containing C, Cr, Si, Ti, Mn, Ni, Nb, Mo, V, W, Zr, RE, B and Fe, cooling after pouring to obtain a billet;

[0022] S2. Carrying out heat treatment to the billet; wherein, the heat treatment specifically includes the following steps: heating the billet to 850° C. for 8 minutes, cooling to 500° C. and then raising the temperature to 730° C. and keeping it for 45 minutes, cooling to 410° C. and then raising the temperature to 700° C. and keeping it for 60 minutes, The primary heat treatment parts are obtained by air cooling out of the furnace; the primary heat treat...

Embodiment 2

[0024] A kind of steel for bucket teeth of excavator, its composition includes by weight percentage: C: 1.65%, Cr: 12.2%, Si: 1.1%, Ti: 0.22%, Mn: 0.75%, Ni: 0.83%, Nb: 0.1 %, Mo: 1.1%, V: 0.31%, W: 0.26%, Zr: 0.01%, Ce: 0.021%, B: 0.0032%, and the balance is Fe and unavoidable impurities.

[0025] A preparation method of steel for excavator bucket teeth, comprising the following steps:

[0026] S1, smelting raw materials containing C, Cr, Si, Ti, Mn, Ni, Nb, Mo, V, W, Zr, RE, B and Fe, cooling after pouring to obtain a billet;

[0027] S2. Carrying out heat treatment to the billet; wherein, the heat treatment specifically includes the following steps: heating the billet to 850° C. for 8 minutes, cooling to 500° C. and then raising the temperature to 730° C. and keeping it for 45 minutes, cooling to 410° C. and then raising the temperature to 700° C. and keeping it for 60 minutes, The primary heat treatment parts are obtained by air cooling out of the furnace; the primary hea...

Embodiment 3

[0029] A kind of steel for bucket teeth of excavator, its composition includes by weight percentage: C: 1.65%, Cr: 12.2%, Si: 1.1%, Ti: 0.22%, Mn: 0.75%, Ni: 0.83%, Nb: 0.1 %, Mo: 1.1%, V: 0.31%, W: 0.26%, Zr: 0.01%, Ce: 0.021%, B: 0.0032%, and the balance is Fe and unavoidable impurities.

[0030] A preparation method of steel for excavator bucket teeth, comprising the following steps:

[0031] S1, smelting raw materials containing C, Cr, Si, Ti, Mn, Ni, Nb, Mo, V, W, Zr, RE, B and Fe, cooling after pouring to obtain a billet;

[0032] S2, performing heat treatment on the billet; wherein, the heat treatment specifically includes the following steps: heating the billet to 850°C for 8 minutes, water cooling to 500°C and then heating to 730°C for 45 minutes, cooling to 410°C and then heating to 700°C for 60 minutes, The primary heat treatment parts are obtained by air cooling out of the furnace; heat the primary heat treatment parts to 950 ° C for 12 minutes, air cool to 650 ° ...

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PUM

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Abstract

The invention discloses steel for excavator bucket teeth and a preparation method of the steel. The steel comprises the following components including C, Cr, Si, Ti, Mn, Ni, Nb, Mo, V, W, Zr, RE, B and Fe. The preparation method of the steel comprises the steps that a blank obtained through raw material smelting, pouring and cooling is heated to 800-850 DEG C, heat preservation is conducted for 8-13 min, after cooling is conducted to 450-500 DEG C, the temperature is increased to 730-770 DEG C, heat preservation is conducted for 25-45 min, cooling to 400-430 DEG C is carried out, the temperature is increased to 700-730 DEG C, heat preservation is conducted for 40-60 min, heating to 950-1100 DEG C is carried out after air cooling, heat preservation is conducted for 5-12 min, air cooling iscarried out to 500-650 DEG C, then water cooling is carried out, heating to the temperature T1 is carried out, heat preservation is conducted for 50-100 min, furnace cooling is carried out, heating iscarried out to the temperature T2, heat preservation is conducted for 60-150 min, and air cooling is carried out, wherein T1 is equal to 210-350 DEG C, and T2 is equal to the sum of T1 and 30 DEG C.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a steel for excavator bucket teeth and a preparation method thereof. Background technique [0002] At present, excavators have become one of the most important construction machinery in engineering construction, and have been widely used in mining, metallurgy, electric power, building materials, cement, machinery and other industries. Bucket teeth are the key wearing parts of the excavator, and the quality of the bucket teeth directly affects the service life of the excavator. When the excavator is working, the bucket teeth of the excavator are in direct contact with sand, soil, rocks, minerals, etc., which not only has serious abrasive wear, but also bears a certain impact load. The service life is often short and the consumption is huge, which will cause huge damage. Economic losses. Therefore, in order to increase the service life of bucket teeth, reduce costs and improve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/50C22C38/48C22C38/44C22C38/46C22C38/54C22C33/04C21D1/18E02F9/28
CPCC21D1/18C22C33/04C22C38/005C22C38/02C22C38/04C22C38/44C22C38/46C22C38/48C22C38/50C22C38/54E02F9/285
Inventor 汪德发陈志勇王印全牛超伟徐光清陈有梅
Owner 安徽中建材开源新材料科技有限公司