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Heat treatment technology for cold-rolled steel coil sleeve

A technology of heat treatment equipment and sleeves, applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve the problems of insufficient strength of cold-rolled steel coil sleeves, easy deformation of workpieces, and dents, so as to ensure the quality of heat treatment and no smoke Effects of pollution and fire prevention

Pending Publication Date: 2020-05-01
WUXI YIBAO MACHINERY EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a cold-rolled steel coil sleeve heat treatment process, which solves the problem that the workpiece is easily deformed, dented and broken during use due to insufficient strength of the cold-rolled steel coil sleeve

Method used

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  • Heat treatment technology for cold-rolled steel coil sleeve
  • Heat treatment technology for cold-rolled steel coil sleeve
  • Heat treatment technology for cold-rolled steel coil sleeve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] like image 3 As shown, take the heat treatment processing of φ808*608*1400 steel coil sleeve as an example:

[0035] A cold-rolled steel coil sleeve heat treatment process is characterized in that it comprises the following heat treatment steps:

[0036] S1. The rough workpiece is processed by a lathe, and at least 10 mm of reserve for finishing is reserved during rough processing;

[0037] S2. The workpiece after rough turning is clamped, hoisted and imported into the heat treatment equipment, and preheated at a temperature of 400 ° C. The preheating time is 4-5 hours and kept warm;

[0038] S3. After the preheated workpiece is hoisted into 840°C for 3.6 hours, the oil quenching treatment is carried out;

[0039] S4. After the workpiece in the oil quenching tank is cooled to within 80°C, it is lifted out of the air cooling, and the follow-up tempering process is arranged immediately according to the hardness measurement of the workpiece one by one. The tempering hea...

Embodiment 2

[0046] like Figure 4 As shown, take the heat treatment processing of φ790*608*1350 steel coil sleeve as an example:

[0047] S1. The rough workpiece is processed by a lathe, and at least 10 mm of reserve for finishing is reserved during rough processing;

[0048] S2. The workpiece after rough turning is clamped, hoisted and imported into the heat treatment equipment, and preheated at a temperature of 400 ° C. The preheating time is 4-5 hours and kept warm;

[0049] S3. After the preheated workpiece is hoisted into 820-860°C for 3.5 hours, the oil quenching treatment is carried out;

[0050] S4. After the workpiece in the oil quenching tank is cooled to within 80°C, it is lifted out of the air cooling, and the follow-up tempering process is arranged immediately according to the hardness measurement of the workpiece one by one. The tempering heat treatment temperature range is 380°C, and the tempering heat treatment time is 11 hours and kept warm;

[0051] S5, hoisting the wo...

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Abstract

The invention relates to the technical field of the strength of cold-rolled steel coil sleeves, and discloses a heat treatment technology for a cold-rolled steel coil sleeve. The heat treatment technology involves a workpiece which is formed through forging. The heat treatment technology comprises the steps that the workpiece is subjected to rough lathing through a lathe; the workpiece is hoistedto be introduced into a heat treatment device, and subjected to preheating, quenching, oil cooling, tempering and other heat treatment processes in sequence, and then finish lathing is conducted. According to the heat treatment technology for the cold-rolled steel coil sleeve, the temperature of quenching liquid can be controlled within a certain range, the control effect on the quality of the quenched steel coil sleeve is excellent, the hardness, the wear resistance and the reasonable structure of the workpiece itself can be effectively improved, and therefore, the heat treatment quality of the workpiece is effectively ensured. the strength and the hardness of the workpiece are significantly improved, the residual stress generated by oil quenching of the workpiece is effectively eliminated, and the workpiece is prevented from being deformed or cracked in use. Moreover, the hardness, strength, toughness and fatigue resistance of the workpiece are effectively improved, and the comprehensive requirements of a machine device, using the cold-rolled steel coil sleeve, for the performance are met.

Description

technical field [0001] The invention relates to the technical field of cold-rolled steel coil sleeve heat treatment technology, in particular to a cold-rolled steel coil sleeve heat treatment process. Background technique [0002] Cold-rolled steel coil sleeves are used in coiling equipment for cold-rolled stainless steel strips, copper strips, silicon steel and special steel strips. They are used to coil steel strips. In the traditional steel coil sleeve forging heat treatment process, quenching and tempering treatment is performed first. , so that the surface hardness of the steel coil sleeve is HRC23-26 degrees. After semi-finishing, the surface is generally quenched at a depth of 10mm, so the surface hardness is high. When using, the surface of the steel coil sleeve is not easy to be scratched, but due to the quenching and tempering hardness (core ) is too low, it is easy to deform the sleeve during work. If the hardness of the inner surface of the steel coil sleeve is t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/08C21D1/78C21D1/18C21D1/60
CPCC21D9/085C21D1/78C21D1/18C21D1/60
Inventor 吴欣梅
Owner WUXI YIBAO MACHINERY EQUIP CO LTD