Wear-resistant steel rod and production method thereof

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, affect the quality of pulp, etc., achieve uniform and stable product performance, and improve service life , the effect of excellent grinding ability

Inactive Publication Date: 2015-11-04
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 freque

Method used

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  • Wear-resistant steel rod and production method thereof
  • Wear-resistant steel rod and production method thereof
  • Wear-resistant steel rod and production method thereof

Examples

Experimental program
Comparison scheme
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

The invention provides a wear-resistant steel rod and a production method thereof, and belongs to the field of heat treatment of metal. The wear-resistant steel rod is prepared through quenching and self tempering of a rolled steel rod. The organization structure of the steel rod sequentially comprises a first decarburized layer with the thickness ranging from 0.2 mm to 0.3 mm, a second quenching martensite layer with the thickness ranging from 0.8 mm to 1.0 mm, a third layer with the thickness accounting for 30% to 36 of the radius of the steel rod, a fourth layer with the thickness accounting for 30% to 36% of the radius of the steel rod and a fifth layer composed of bainite plus needle-shaped martensite and very small amount of pearlite from the surface to the central portion, wherein the third layer is composed of tempering martensite and a small amount of bainite, and the fourth layer is composed of tempered martensite and bainite gradually increased along the core. The production method comprises 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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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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