A kind of wear-resistant steel bar and its production method

A production method and wear-resistant steel technology, applied in furnaces, heat treatment equipment, heat treatment furnaces, etc., can solve the problems of heavy labor burden on workers, reduce the service life of equipment, waste of resources, etc., achieve uniform and stable product performance, increase service life, The effect of reducing equipment investment

Inactive Publication Date: 2017-07-21
郑州赫芃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

[0003] At present, the grinding steel rods used in rod mills on the market are mostly rolled steel rods in steel mills, which have poor wear resistance and consume a lot, resulting in a great waste of resources
At the same time, the short service life of grinding rods will also bring about many problems as follows: 1) The high frequency of adding rods brings a heavy labor burden to the workers and increases the labor cost of the enterprise; 2) The residue of grinding rods enters the pulp as impurities, Affect the quality of the pulp; 3) The grinding rod residue carried away by the pulp will further wear the equipment and reduce the service life of the equipment

Method used

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  • A kind of wear-resistant steel bar and its production method
  • A kind of wear-resistant steel bar and its production method
  • A kind of wear-resistant steel bar and its production method

Examples

Experimental program
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Effect test

Embodiment 1

[0021] A kind of wear-resistant steel bar, which is a 42CrMo round bar with a diameter of 100mm. From the surface of the steel bar to the center, its organizational structure includes 5 layers: the first layer is a decarburized layer with a thickness of 0.2mm; the second layer is a quenched Martensitic layer. body, thickness 0.8mm; the third layer structure is tempered martensite + a small amount of bainite, thickness 16mm; the fourth layer structure is tempered martensite + gradually increasing bainite along the center, thickness 16mm; the rest are The fifth layer, its organization is bainite + acicular martensite + a very small amount of pearlite.

[0022] The wear-resistant steel rod is made from a 42CrMo round rod obtained by rolling steel through quenching and self-tempering.

[0023] Its specific production method includes the following steps: (1) Using an induction heating furnace to heat the 42CrMo round bar obtained by rolling (hot rolling) to 740±10°C and continue to...

Embodiment 2

[0028] A wear-resistant steel rod, which is a 42CrMo round rod with a diameter of 100mm. From the surface of the steel rod to the core, its structure includes 5 layers: the first layer is a decarburized layer with a thickness of 0.3mm; the second layer is a quenched Martensitic layer. body, thickness 1.0mm; the third layer structure is tempered martensite + a small amount of bainite, thickness 17mm; the fourth layer structure is tempered martensite + gradually increasing bainite along the center, thickness 17mm; the rest are The fifth layer, its organization is bainite + acicular martensite + a very small amount of pearlite.

[0029] The wear-resistant steel rod is made from a 42CrMo round rod obtained by rolling steel through quenching and self-tempering.

[0030] Its specific production method includes the following steps: (1) use induction heating furnace to heat 42CrMo round bar to 740±10°C and continue to heat up to the quenching temperature within 3 minutes, and the quen...

Embodiment 3

[0032] A wear-resistant steel rod, which is a 42CrMo round rod with a diameter of 100mm. From the surface of the steel rod to the core, its structure includes 5 layers: the first layer is a decarburized layer with a thickness of 0.3mm; the second layer is a quenched Martensitic layer. body, thickness 0.9mm; the third layer structure is tempered martensite + a small amount of bainite, thickness 17mm; the fourth layer structure is tempered martensite + gradually increasing bainite along the center, thickness 16mm; the rest are The fifth layer, its organization is bainite + acicular martensite + a very small amount of pearlite.

[0033] The wear-resistant steel rod is made from a 42CrMo round rod obtained by rolling steel through quenching and self-tempering.

[0034] Its specific production method includes the following steps: (1) use induction heating furnace to heat 42CrMo round bar to 740±10°C and continue to heat up to quenching temperature in 4min, said quenching temperatur...

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Abstract

A wear-resistant steel rod and a production method thereof, belonging to the field of metal heat treatment technology, the wear-resistant steel rod is obtained from a rolled steel rod through quenching and self-tempering, and the structure of the steel rod from the surface to the core includes 5 layers in sequence : The first layer is a decarburized layer with a thickness of 0.2-0.3mm; the second layer is a quenched martensite with a thickness of 0.8-1.0mm; the third layer is a tempered martensite + a small amount of bainite with a thickness of steel rod 30% to 36% of the radius; the fourth layer structure is tempered martensite + bainite gradually increasing along the center, and the thickness is 30% to 36% of the steel rod radius; the rest is the fifth layer, and its structure is Bainite + acicular martensite + a very small amount of pearlite. The production method includes the steps of heating, quenching and self-tempering.

Description

technical field [0001] The invention belongs to the field of metal heat treatment technology, and in particular relates to a grinding steel rod for a rod mill, and also relates to a production method of the steel rod. Background technique [0002] Rod mill, named because the grinding body loaded in the barrel is a steel rod, is a widely used industrial grinding equipment. During the grinding process, the steel rod is lifted to a certain height under the action of centrifugal force and friction force, and falls in the state of throwing or leaking, and the ore to be ground continuously enters the inside of the cylinder from the ore feeding port and is crushed by the moving steel rod , forming a slurry. While crushing minerals, the steel rod itself is also consumed by constant wear and tear. Therefore, in order to make the rod mill work stably, it is necessary to add new steel rods in time. [0003] At present, most of the grinding steel rods used for rod mills on the market...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/00C21D1/18
Inventor 房少卿孙世锋
Owner 郑州赫芃新材料科技有限公司
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