Treatment method for eliminating residual stress of stainless steel welding piece

A technology of residual stress and treatment method, applied in the direction of heat treatment furnace, heat treatment equipment, improvement of process efficiency, etc., can solve the problems affecting the working life and residual tensile stress of stainless steel welding parts, and achieve the effect of eliminating residual stress and reducing residual stress.

Inactive Publication Date: 2017-12-12
HEFEI ZHENGMING MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the inherent characteristics of the fusion welding process itself, there is a large residual tensile stress in the we

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0017] Example 1

[0018] A treatment method for eliminating residual stress of stainless steel welded parts, including the following steps:

[0019] (1) Dipping treatment: soak the stainless steel welded parts in absolute ethanol for 30 minutes, then take it out, wash with deionized water, and dry to constant weight;

[0020] (2) Quenching treatment: The stainless steel welded parts are heated in a resistance furnace, and the stainless steel is preheated at 520°C for 35 minutes; after preheating, the stainless steel is heated at 780°C for 25 minutes. The welded parts are taken out of the furnace and quenched into quenching oil at 40°C for cooling. The cooling time is 1 hour, and the quenching oil is taken out when the temperature of the stainless steel welded parts reaches 150°C;

[0021] (3) Ultrasonic treatment: The stainless steel welded parts proposed in step (2) self-quenching oil are treated with 500W and 800W ultrasonic waves respectively. During ultrasonic treatment, keep the...

Example Embodiment

[0029] Example 2

[0030] A treatment method for eliminating residual stress of stainless steel welded parts, including the following steps:

[0031] (1) Dipping treatment: soak the stainless steel welded parts in absolute ethanol for 30 minutes, then take it out, wash with deionized water, and dry to constant weight;

[0032] (2) Quenching treatment: The stainless steel welded parts are heated in a resistance furnace, and the stainless steel welded parts are preheated at 560°C for 40 minutes; after preheating, they are heated at 820°C for 30 minutes; the stainless steel is heated after the heat preservation is completed. The welded parts are taken out of the furnace and quenched in 42°C quenching oil for cooling. The cooling time is 1 hour until the temperature of the stainless steel welded parts is 160°C.

[0033] (3) Ultrasonic treatment: The stainless steel welded parts proposed in step (2) self-quenching oil are treated with 500W and 800W ultrasonic waves respectively. During ult...

Example Embodiment

[0041] Example 3

[0042] A treatment method for eliminating residual stress of stainless steel welded parts, including the following steps:

[0043] (1) Dipping treatment: soak the stainless steel welded parts in absolute ethanol for 30 minutes, then take it out, wash with deionized water, and dry to constant weight;

[0044] (2) Quenching treatment: The stainless steel welded parts are heated in a resistance furnace, and the stainless steel welded parts are preheated at 550°C for 38 minutes; after preheating, they are heated at 790°C for 28 minutes; the stainless steel is heated after the insulation is completed. The welded parts are quenched into 41℃ quenching oil to cool down, cooling time is 1 hour, until the stainless steel welded parts temperature is 155℃, the quenching oil will be taken out;

[0045] (3) Ultrasonic treatment: The stainless steel welded parts proposed in step (2) self-quenching oil are treated with 500W and 800W ultrasonic waves respectively. During ultrasonic ...

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PUM

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Abstract

The invention discloses a treatment method for eliminating residual stress of a stainless steel welding piece, and relates to the technical field of welding pieces. The treatment method includes the steps of (1) immersion treatment, (2) quenching treatment, (3) ultrasonication, (4) tempering treatment, and (5) ultrasonication. According to the treatment method for eliminating residual stress of the stainless steel welding piece, after treated stainless steel is welded, the stainless steel welding residual stress can be remarkably reduced, and the service life of the treated stainless steel is prolonged.

Description

technical field [0001] The invention belongs to the technical field of welding parts, and in particular relates to a processing method for eliminating residual stress of stainless steel welding parts. Background technique [0002] As one of the material connection methods, welding is widely used in the production of magnesium alloy parts. At present, the welding methods used for stainless steel include: AC argon arc (TIG) welding, laser welding and friction welding, etc., but the most commonly used in production is AC argon arc welding. Due to the inherent characteristics of the fusion welding process itself, there is a large residual tensile stress in the welded joint and the welding heat-affected zone (HAZ), which greatly affects the working life of the stainless steel weldment. Contents of the invention [0003] The object of the present invention is to provide a treatment method for eliminating the residual stress of stainless steel welded parts aiming at the existing...

Claims

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Application Information

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IPC IPC(8): C21D1/18C21D10/00C21D9/50
CPCC21D1/18C21D9/50C21D10/00Y02P10/20
Inventor 周正明
Owner HEFEI ZHENGMING MACHINERY CO LTD
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