Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Welding wire for high-grade martensitic heat-resistant steel with anti-aging embrittlement of weld seam and its application

A high-grade, anti-aging technology, used in welding equipment, welding media, welding/cutting media/materials, etc., can solve problems such as aging embrittlement of welds, achieve good weld formation, improve creep strength, and process adaptation. good effect

Active Publication Date: 2021-12-07
WUHAN UNIV
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The welding wires published in these patent documents are all designed with a high content of W element similar to 9Cr-3W-3Co, and the welds have obvious aging embrittlement

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
  • Welding wire for high-grade martensitic heat-resistant steel with anti-aging embrittlement of weld seam and its application
  • Welding wire for high-grade martensitic heat-resistant steel with anti-aging embrittlement of weld seam and its application
  • Welding wire for high-grade martensitic heat-resistant steel with anti-aging embrittlement of weld seam and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] The fluidity of molten iron in Example 1 is better than that of Comparative Example 1, so its process operability is good, and welding defects such as incomplete fusion and incomplete penetration are not easy to occur.

[0080] figure 1 It is a macroscopic photo of the GTAW joint welded by the welding wire of Example 1. The figure shows that the welding wire of Example 1 can meet the requirements of the GTAW welding process, and the weld is well formed without defects such as cracks, pores and inclusions.

[0081] figure 2 It is the weld microstructure of the GTAW joint welded by the welding wire of Example 1. The figure shows that the welding seam of the welding wire of Example 1 under the GTAW process is a tempered lath martensitic structure, and no δ-ferrite appears.

[0082] The room temperature mechanical properties of the joints of Example 1 and Comparative Example 1 were evaluated according to DL / T868 Welding Procedure Qualification Regulations, and the results...

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
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a welding wire for high-grade martensitic heat-resistant steel whose weld seam is resistant to age embrittlement and its application. The chemical composition of welding wire is: C: 0.05-0.12%, Si: 0.15-0.40%, Mn: 0.40-1.0%, P: less than 0.01%, S: less than 0.008%, Ni: less than 0.20%, Cr: 8.50-9.50 %, W: 0.90-1.90%, Mo: 0.30-1.10%, Co: 2.50-3.50%, Nb: 0.03-0.07%, V: 0.15-0.25%, N: 0.03-0.07%, B: 0.001-0.004% , Cu: 0.10% or less, Ti: 0.01% or less, Al: 0.03% or less, and the rest are Fe and unavoidable impurities. The welding seam is well formed, the initial toughness is high, the tendency of aging embrittlement is small, and the high temperature creep durability of the joint is excellent.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a welding wire for high-grade martensitic heat-resistant steel with anti-aging embrittlement of welds and an application thereof. Background technique [0002] The 9Cr-3W-3Co series martensitic heat-resistant steel is an ideal material for the construction of thick-walled pressure-bearing components such as ultra-supercritical thermal power unit headers and steam pipes with steam temperature parameters above 625 ° C. The commercial grades include G115 steel developed in China and Japan. Developed T / P93 steel, the creep strength of this type of steel is 20-50% higher than that of T / P92 steel. In the process of building high-parameter ultra-supercritical thermal power units, there are a large number of welded joints of this type of steel, so the process performance and conventional mechanical properties of the joints need to meet the requirements, especially t...

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
Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30
CPCB23K35/3086
Inventor 王学张达
Owner WUHAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com