Novel cold rolled driving roller heat treatment process

A transmission roller and preheating technology, which is applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve the problems of ineffective elimination of internal stress and the amount of ferromagnetic iron, so as to improve hardness, solve cracks, and reduce deformation. Effect

Pending Publication Date: 2020-08-18
WUXI YIBAO MACHINERY EQUIP CO LTD
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AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a new type of heat treatment process for cold-rolled drive rolls, wh

Method used

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  • Novel cold rolled driving roller heat treatment process
  • Novel cold rolled driving roller heat treatment process
  • Novel cold rolled driving roller heat treatment process

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Embodiment 1

[0035] like Figure 2-3 As shown, take the heat treatment processing of φ200*2728 cold-rolled drive roll as an example:

[0036] A novel heat treatment process for a cold-rolled drive roller, comprising the following heat treatment steps:

[0037] S1. The cold rolling drive roll is heat treated by the sub-preheating method, preheating in the heating equipment, and successively preheating at 400 °C → 600 °C preheating → 800 °C preheating, 400 °C preheating time is 9 hours, 600 °C preheating The preheating time at ℃ is 6 hours, and the preheating time at 800℃ is 3 hours;

[0038] S2. After the cold rolling drive roller is preheated, it is heated at 995-1140°C by heating equipment, and the heating time is 100min;

[0039] S3. After the cold-rolled drive roller is heated at high temperature, it is air-cooled to within 70-90 °C, and then placed in a quenching equipment for constant temperature quenching treatment. The constant temperature quenching temperature range is 150-180 ° ...

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Abstract

The invention relates to the technical field of cold rolled driving roller heat treatment, and discloses a novel cold rolled driving roller heat treatment process. According to the process, a workpiece and a driving side end are included, wherein the driving side end is located at one end of the workpiece, the workpiece and the driving side end are firstly subjected to preheating treatment, and then is subjected to heating, a heated workpiece is subjected to constant-temperature quenching, the quenched workpiece and the driving side end are cooled, then low-temperature tempering is carried out, after low-temperature tempering is conducted, heating and preheating are carried out, then two-time high-temperature tempering is carried out, and a cold rolled driving roller is preheated after subjected to high-temperature tempering and cooling, high-temperature tempering is performed on the driving side end separately and then cooling is conducted. According to the novel cold rolled driving roller heat treatment process, residual austenite can be converted into martensite, after secondary high-temperature tempering, the residual austenite accounts about 8%-10%, the residual austenite is converted into the martensite, the wear resistance and the service life of the cold rolled driving roller are effectively increased and prolonged, the crack condition is effectively solved during rolling by a customer, and the service life of a roller is prolonged.

Description

technical field [0001] The invention relates to the technical field related to the heat treatment of cold rolling drive rolls, in particular to a novel cold rolling drive roll heat treatment process. Background technique [0002] As an important part of the cold rolling mill, the cold rolling drive roll has developed rapidly with the advancement of the steel rolling technology and the continuous upgrading of the rolling equipment. Fully keeping up with the technological progress of the iron and steel industry, the production capacity of high-end rolls is obviously insufficient. The cold-rolled drive roll needs to go through a series of heat treatment processes during production to improve the comprehensive performance of the cold-rolled drive roll. The surface of the cold-rolled drive roll needs to be used. Bear large contact stress, alternating stress and friction force, but the existing cold-rolled drive roller cannot effectively eliminate the internal stress of the workpi...

Claims

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Application Information

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IPC IPC(8): C21D1/18C21D9/38
CPCC21D1/18C21D9/38C21D2211/008
Inventor 吴欣梅
Owner WUXI YIBAO MACHINERY EQUIP CO LTD
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