Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for controlling reheat cracks in welding heat affected zone of structural component with large restraint degree

A technology for welding heat-affected zones and structural components, used in welding equipment, manufacturing tools, metal processing equipment, etc., can solve problems such as aggravating the tendency of reheat cracks in welded joints, and achieve the purpose of eliminating reheat cracks, reducing the tendency of reheat cracks, The effect of improving quality

Active Publication Date: 2020-02-11
DONGFANG TURBINE CO LTD
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Finally, the structural weld with large wall thickness has extremely strong shrinkage and tensile stress on the two sides of the body. After welding, the body has a certain degree of anti-gravity deformation. state, gravity will be superimposed on the upper part of the near-surface welded joint, further aggravating the reheat crack tendency of the upper near-surface coarse-grained heat-affected zone of the welded joint

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for controlling reheat cracks in welding heat affected zone of structural component with large restraint degree
  • Method for controlling reheat cracks in welding heat affected zone of structural component with large restraint degree
  • Method for controlling reheat cracks in welding heat affected zone of structural component with large restraint degree

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0023] Any feature disclosed in this specification, unless specifically stated, can be replaced by other alternative features that are equivalent or have similar purposes. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0024] like Figure 2 to Figure 5 As shown, a method for controlling reheat cracks in the welding heat-affected zone of a structural component with a large degree of restraint in this embodiment includes the following steps:

[0025] Step 1. Welding the first structural part 1 and the second structural part 2, so that they are connected through the welding joint 3 to form a structural assembly with a large degree of restraint;

[0026] Step 2, welding and remelting the weld bead 4 on the surface of ...

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

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for controlling reheat cracks in a welding heat affected zone of a structural component with the large restraint degree, and belongs to the technical field of weldingof structural components with large restraint degrees. The method for controlling the reheat cracks in the welding heat affected zone of the structural component with the large restraint degree comprises the following steps of 1, welding a first structural member and a second structural member, and connecting the first structural member and the second structural member through a welding joint to form the structural component with the high restraint degree; and 2, welding a remelting weld bead on the surface of the welding heat affected zone of the welding joint in the step 1. By adopting the method, the reheat crack tendency of the welding heat affected zone of the structural component with the large restraint degree can be reduced, reheat cracks in the welding heat affected zone of the structural component with the large restraint degree can be avoided or even completely eradicated, and the quality of the welding joint is improved.

Description

technical field [0001] The invention relates to a method for controlling reheating cracks in a welding heat-affected zone of structural components with a large degree of restraint, and belongs to the technical field of welding of structural components with a major degree of restraint. Background technique [0002] The thermal power steam turbine valve manufactured by welding has a welded joint of a large thick-walled pipe butt welded structure. At the same time, the welded joint is constrained by the super gravity of the two sides of the body, and the heat-affected zone of the weld is prone to reheat cracks7, such as figure 1 shown. [0003] After welding, the near surface of welded structural components with certain constraints presents large welding residual stress. During post-weld heat treatment or high-temperature service, intergranular cracking is prone to occur in the position of the heat-affected zone of coarse grains. Although the microscopic mechanism of this crack...

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): B23K31/02
CPCB23K31/02B23K31/027
Inventor 熊建坤徐健杨林毛桂军杨建平张海波许德星黄丽赵鹏飞何芬周艳兵王大勇王喆刘友东郑亮亮吴博杨东
Owner DONGFANG TURBINE CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com