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Novel full-hardening cold-rolling working roller heat treatment process

A cold-rolled work roll, full hardening technology, used in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve problems such as easy damage of cold-rolled work rolls, shorten heating time, avoid bending or cracking, and reduce temperature differences. Effect

Pending Publication Date: 2020-04-17
WUXI YIBAO MACHINERY EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the existing technology, the present invention provides a new type of heat treatment process for fully hardened cold-rolled work rolls, which solves the problem that the cold-rolled work rolls are easily damaged after being quenched unevenly by the traditional heat treatment process for a long time

Method used

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  • Novel full-hardening cold-rolling working roller heat treatment process
  • Novel full-hardening cold-rolling working roller heat treatment process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 As shown, take the 46*790 work roll as an example:

[0032] A new heat treatment process for fully hardened cold-rolled work rolls, including the following heat treatment steps:

[0033] S1. Place the workpiece on the heating equipment, clamp and hoist it in for preheating. Preheat at 400°C, 600°C, and 800°C successively. The preheating time for the workpiece at 400°C is 3.5 hours. The preheating time is 2.5 hours, and the preheating time is 1.5 hours at 800°C;

[0034] S2. Hoist the preheated workpiece into a high-temperature quenching environment at 1120±10°C for heating, and the heating time for high-temperature quenching is 75 minutes;

[0035] S3, then hang the workpiece into a constant temperature quenching environment for constant temperature quenching treatment, the temperature of the constant temperature quenching environment is 180 ° C, and the constant temperature quenching time is 10 minutes;

[0036] S4. Oil cooling the quenched workpiec...

Embodiment 2

[0042] Such as figure 2 As shown, take the 55*855 work roll as an example:

[0043] A new heat treatment process for fully hardened cold-rolled work rolls, including the following heat treatment steps:

[0044] S1. Place the workpiece on the heating equipment, clamp and hoist it in for preheating. Preheat at 400°C, 600°C, and 800°C successively. The preheating time for the workpiece at 400°C is 3.5 hours. The preheating time is 2.5 hours, and the preheating time is 1.5 hours at 800°C;

[0045] S2. Hoist the preheated workpiece into a high-temperature quenching environment at 1160±10°C for heating, and the heating time for high-temperature quenching is 95 minutes;

[0046]S3, then hang the workpiece into a constant temperature quenching environment for constant temperature quenching treatment, the temperature of the constant temperature quenching environment is 190 ° C, and the constant temperature quenching time is 10.5 minutes;

[0047] S4. Oil cooling the quenched workpi...

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Abstract

The invention relates to the technical field of full-hardening cold-rolling working roller heat treatment processing, and discloses a novel full-hardening cold-rolling working roller heat treatment process. Preheating treatment is performed on a workpiece first, then high-temperature quenching and heating are performed at 1080-1180 DEG C, and then the workpiece is hung into a constant-temperaturequenching environment to be subjected to constant-temperature quenching treatment. By means of the novel full-hardening cold-rolling working roller heat treatment process, heating and heat preservingare performed at each stage with the purposes of ensuring that the workpiece moves to a higher-temperature environment and finally reaches a quenching temperature after internal and external metal texture reaches a set temperature, reducing the deformation of the workpiece to a certain extent, shortening the heating time of the workpiece at the quenching temperature, improving the heat treatment efficiency of the workpiece, improving the metallographic phase texture distribution compactness, thermal shock resistance and abrasive resistance of a working roller, ensuring that hanging and air-cooling are performed after the parts, with different sizes, of the cold-rolling working roller reach the same temperature, effectively reducing the deformation of the cold-rolling working roller and preventing the working roller from being bent or broken.

Description

technical field [0001] The invention relates to the technical field of heat treatment processing of fully hardened cold rolling work rolls, in particular to a novel heat treatment process of fully hardened cold rolling work rolls. Background technique [0002] Cold-rolled work rolls can be divided into cold-rolled stainless steel strips, cold-rolled copper strips, and cold-rolled special alloy steel strips according to the rolled products. The new fully hardened cold-rolled work rolls are suitable for rolling super-hard For thin and special stainless steel, copper strips and special strips, the highest hardness of rolled plates can reach above HV580. When the cold-rolled work roll is rolled and rolled, the surface of the roll body needs to bear large contact stress, alternating stress and friction force, which makes the traditional cold-rolled work roll prone to thermal cracks during the rolling process, which may easily cause the work roll to explode. rolls, spalling, and ...

Claims

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Application Information

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IPC IPC(8): C21D1/20C21D9/38
CPCC21D1/20C21D9/38
Inventor 吴欣梅
Owner WUXI YIBAO MACHINERY EQUIP CO LTD
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