Postweld heat treatment quality examination method

A post-weld heat treatment and quality inspection technology, applied in the direction of testing the hardness of materials, can solve the problems of high production cost, many processes, and high operator experience requirements, and achieve the effect of low manufacturing cost and reasonable process.

Inactive Publication Date: 2016-10-05
重庆沁煌实业有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing post-weld heat treatment quality inspection methods have unreasonable process arrangem

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0013] The present invention will be further described below in conjunction with examples:

[0014] A method for quality inspection of post-weld heat treatment, including the following steps:

[0015] (1) After the heat treatment of the welded joint, if it is confirmed that the automatic recording curve is normal, one point in the weld and the heat-affected zone can be taken to test the hardness value, and the sampling rate can be carried out according to the design regulations;

[0016] (2) The hardness value of heat-treated welds generally does not exceed the low hardness of the base material cloth HB+100, and does not exceed the following requirements:

[0017] Total alloy content<3% HB≤270

[0018] Total content of alloy 3%~10% HB≤300

[0019] Total alloy content>10% HB≤350

[0020] (3) When the hardness value of the weld exceeds the specified range, re-inspection should be doubled according to the shift, and the reason should be found out, and the unqualified weld should be heat trea...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a postweld heat treatment quality examination method. The method comprises the following steps: 1) after heat treatment of a welded joint, if no abnormity is generated on automatic recorded curves, the test hardness value can be taken at the welded seam and the heat influence zones, the sampling observation rate can be carried out according to the design regulation; 2) hardness number of the heat treatment welded seam generally does not exceed low hardness of HB+100 of a parent metal and should be followed with the following regulations: the total content of the alloy is less than 3%, HB is less than or equal to 270; the total content of the alloy is 3%-10%, HB is less than or equal to 300; and the total content of the alloy is greater than 10%, HB is less than or equal to 350; and 3) when the hardness number of the welded seam exceeds a prescribed range, double re-inspection can be carried out, the reason is found out, and the heat treatment and hardness test of the unqualified welded seam are carried out. The examination method has the advantages of reasonable process and low manufacture cost.

Description

technical field [0001] The invention relates to a method for inspecting the quality of heat treatment after welding. Background technique [0002] The existing post-weld heat treatment quality inspection methods have unreasonable process arrangements, numerous processes, and high requirements for operator experience, resulting in high production costs. Contents of the invention [0003] In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide a quality inspection method for post-weld heat treatment with reasonable process and low manufacturing cost. [0004] To achieve the above object, the present invention provides [0005] A post-weld heat treatment quality inspection method, comprising the steps of: [0006] (1) After the heat treatment of the welded joint, if it is confirmed that there is no abnormality in the automatic recording curve, one point can be taken from the weld and the heat-affecte...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01N3/40
Inventor 赵伟
Owner 重庆沁煌实业有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap