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2Cr13 heat treatment process

A 2cr13 technology, which is applied in the field of heat treatment of 2Cr13 materials for reciprocating compressors, can solve problems such as cracks, poor toughness, and low surface hardening hardness, and achieve the effects of improving wear resistance, increasing hardness, and reducing quenching cracks

Inactive Publication Date: 2009-12-23
SHENYANG BLOWER WORKS GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned traditional technology, provide a 2Cr13 heat treatment process for reciprocating compressors, and solve the problems of cracks, low surface hardening hardness and poor toughness caused by traditional surface heat treatment of 2Cr13 piston rods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The specific steps of this embodiment are as follows:

[0024] (1) Conventional forging;

[0025] (2) Annealing: heat preservation at 860°C±10°C for 2 hours, cool to 350°C in the furnace and air cool to room temperature;

[0026] (3) Conventional machining;

[0027] (4) Quenching and tempering treatment: heat preservation at 960°C for 2.5 hours, cool the oil out of the furnace to 150°C, air-cool the oil to room temperature, transfer it to a tempering furnace and heat it to 660°C for 3 hours, and air-cool it to room temperature;

[0028] (5) Conventional semi-finishing: generally used for cutting when the geometric tolerance requirements of parts are relatively high, in order to leave a small machining allowance for finishing, it can be used flexibly according to the tolerance requirements of parts and the characteristics of processing materials;

[0029] (6) Stress relief treatment: stress relief treatment at 580°C to 590°C for 3 hours, then furnace cooled to room tem...

Embodiment 2

[0047] The difference from Example 1 is:

[0048](1) Conventional forging;

[0049] (2) Annealing: heat preservation at 860°C±10°C for 3 hours, cool in the furnace to 750°C±10°C, and air cool to room temperature;

[0050] (3) Conventional machining;

[0051] (4) Quenching and tempering treatment: keep warm at 970°C for 3.5 hours, cool the oil out of the furnace to 175°C, air-cool the oil to room temperature, transfer it to a tempering furnace and heat it to 675°C and keep it for 4.5 hours, then air-cool it to room temperature;

[0052] (5) Conventional semi-finishing: generally used for cutting when the geometric tolerance requirements of parts are relatively high, in order to leave a small machining allowance for finishing, it can be used flexibly according to the tolerance requirements of parts and the characteristics of processing materials;

[0053] (6) Stress relief treatment: Stress relief treatment at 580°C to 590°C for 4 hours, then furnace cooled to room temperature...

Embodiment 3

[0060] (1) Conventional forging;

[0061] (2) Annealing: heat preservation at 860°C±10°C for 4 hours, cool in the furnace to 750°C±10°C, and air-cool to room temperature;

[0062] (3) Conventional machining;

[0063] (4) Quenching and tempering treatment: heat preservation at 980°C for 5 hours, cool the oil out of the furnace to 200°C, air-cool the oil to room temperature, transfer it to a tempering furnace and heat it to 690°C for 6.5 hours, and air-cool it to room temperature after taking out the furnace;

[0064] (5) Conventional semi-finishing: generally used for cutting when the geometric tolerance requirements of parts are relatively high, in order to leave a small machining allowance for finishing, it can be used flexibly according to the tolerance requirements of parts and the characteristics of processing materials;

[0065] (6) Stress relief treatment: stress relief treatment at 580°C to 590°C for 5 hours, and then furnace cooled to room temperature;

[0066] (7) C...

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Abstract

The invention belongs to the field of a heat treatment process for reciprocating-compressor 2Cr13 piston-rods, and is applicable to all reciprocating compressors adopting a 2Cr13 piston-rod heat treatment process and mechanical equipment which requires high toughness and needs post-order surface heat treatment. The process can solve the problem that the prior heat treatment adopted for 2Cr13 piston rods is low in impact toughness, large in high-frequency quenching deformation of long-axis parts, large in hardening cracks and workpiece residual stress, and the like. The process comprises the forging molding of 2Cr13 piston rods, annealing, quenching-tempering, stabilizing, medium-frequency or high-frequency quenching and low-temperature tempering. The 2Cr13 heat treatment process can completely overcome the disadvantages of the prior heat treatment process such as incapability of eliminating residual stress and serious high-frequency quenching workpiece distortion, and is an ideal heat treatment process for long-axis workpieces.

Description

technical field [0001] The invention belongs to the field of heat treatment process of 2Cr13 material used in reciprocating compressors, and is applicable to the heat treatment process of 2Cr13 piston rods used in all reciprocating compressors; it can also be applied to parts of mechanical equipment requiring high toughness and strict distortion requirements. Background technique [0002] At present, the heat treatment process of 2Cr13 piston rod for reciprocating compressors includes heat treatment processes such as forging, annealing, quenching and tempering, stress relief, high-frequency quenching and low-temperature tempering. The traditional heat-treated 2Cr13 material has low impact toughness and often fails to reach skills requirement. The original stress relief temperature is 350°C for 6 hours, and the stress cannot be completely eliminated, which will cause great distortion during the subsequent high frequency or intermediate frequency treatment, resulting in the me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/00C21D1/18C21D1/30C21D1/613
Inventor 曲德毅
Owner SHENYANG BLOWER WORKS GROUP CORP
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