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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 welded joint and the welding heat-affected zone (HAZ), which greatly affects the working life of the stainless steel weldment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

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

[0020] (2) Quenching treatment: heat the stainless steel welded parts in a resistance furnace, preheat at 520°C for 35 minutes; after preheating, heat at 780°C for 25 minutes; The welded piece is 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 weldment is 150°C;

[0021] (3) Ultrasonic treatment: Use 500W and 800W ultrasonic waves to treat the stainless steel welded parts from the self-quenching oil in step (2) respectively. During ultrasonic treatment, keep the temperature of the stainless steel welded parts not lower than 120 ° C, and then Naturally cool to ro...

Embodiment 2

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

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

[0032] (2) Quenching treatment: heat the stainless steel welded parts in a resistance furnace, preheat at 560°C for 40 minutes; after preheating, heat at 820°C for 30 minutes; The weldment is quenched into quenching oil at 42°C for cooling for 1 hour, and the quenching oil is taken out when the temperature of the stainless steel weldment is 160°C;

[0033] (3) Ultrasonic treatment: Use 500W and 800W ultrasonic waves to treat the stainless steel welded parts from the self-quenching oil in step (2) respectively. During ultrasonic treatment, keep the temperature of the stainless steel welded parts not lower than 120 ° C, and then Naturally cool to room temperature in the...

Embodiment 3

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

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

[0044] (2) Quenching treatment: heat the stainless steel welded parts in a resistance furnace, preheat at 550°C for 38 minutes; heat at 790°C after preheating, and hold for 28 minutes; The weldment is quenched into quenching oil at 41°C for cooling, and the cooling time is 1 hour, and the quenching oil is taken out when the temperature of the stainless steel weldment is 155°C;

[0045] (3) Ultrasonic treatment: Use 500W and 800W ultrasonic waves to treat the stainless steel welded parts from the self-quenching oil in step (2) respectively. During ultrasonic treatment, keep the temperature of the stainless steel welded parts not lower than 120 ° C, and then Naturally c...

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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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