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Welding method for dissimilar stellite trace alloy elements

A technology of micro-alloy and welding method, which is applied in the direction of welding medium, welding equipment, welding equipment, etc., and can solve problems such as failure to meet performance requirements

Active Publication Date: 2022-03-25
DONGFANG TURBINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, when Stellite alloy is used as welding wire for surfacing welding, manual argon tungsten arc welding is basically used. The successful application of the method can only be used for non-critical core products that require conventional use, but for corrosion-resistant and wear-resistant And the key core products with quite long service performance requirements, which cannot meet the performance requirements. In view of this, in the welding process, only the trace control of alloy elements can achieve this effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The welding method of dissimilar stellite trace alloy elements specifically comprises the following steps:

[0024] (1) Analyze the chemical composition of the processed workpiece with a composition analysis instrument to meet the standard requirements of ultra-low carbon stainless steel 304L. The base material of the workpiece is ultra-low carbon stainless steel 304L, and its chemical composition is carbon ≤ 0.03 in mass percentage %, chromium 18.0-20.0%, silicon ≤ 1.0%, manganese ≤ 2.0%, nickel 9.0-12.0%, sulfur ≤ 0.03%, phosphorus ≤ 0.045%, and the balance is iron;

[0025] (2) According to the specific use area of ​​the finished product, determine the part of the workpiece to be welded, and the size and structure of the product meet the design and use requirements;

[0026] (3) Conduct non-destructive inspection on the determined parts to be welded according to the standard to ensure that the parts to be welded are free of defects, and put the workpieces that pass t...

Embodiment 2

[0034] The welding method of dissimilar stellite trace alloy elements specifically comprises the following steps:

[0035] (1) Analyze the chemical composition of the processed workpiece with a composition analysis instrument to meet the standard requirements of ultra-low carbon stainless steel 304L. The selected base material is ultra-low carbon stainless steel 304L, and its chemical composition is carbon ≤ 0.03 in mass percentage %, chromium 18.0-20.0%, silicon ≤ 1.0%, manganese ≤ 2.0%, nickel 9.0-12.0%, sulfur ≤ 0.03%, phosphorus ≤ 0.045%, and the balance is iron;

[0036] (2) According to the specific use area of ​​the finished product, determine the part of the workpiece to be welded, and the size and structure of the product meet the design and use requirements;

[0037] (3) Carry out non-destructive inspection on the determined parts to be welded in accordance with relevant requirements to ensure that the parts to be welded are free of defects, and the non-destructive i...

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Abstract

The invention provides a welding method for dissimilar stellite trace alloy elements, belongs to the field of welding, and aims to solve the technical problems of dilution rate, quality stability, service life and the like of stainless steel in a surfacing process. And the input and the outflow of elements in the welding process are in a high-quality range, so that the hardening degree of a welding seam and a heat affected zone is reduced, the wear resistance, the corrosion resistance and the crack resistance of the welding seam are improved, the generation of harmful components is inhibited, the product is prevented from generating low-melting-point eutecticum such as M23C6 and the like to cause grain boundary cracking, meanwhile, a surfacing layer can be ensured to have higher strength, and the welding quality is improved. And the long-term use performance of the product can be met and improved under high-temperature, high-pressure and complex working conditions.

Description

technical field [0001] The invention belongs to the field of welding, in particular to a welding method of dissimilar stellite trace alloy elements. Background technique [0002] At present, my country's economy has entered a critical period for the transformation of new and old kinetic energy. The wide application of new technologies such as artificial intelligence and big data has spawned a large number of new industries. Technological innovation has also made a series of major breakthroughs. However, my country's core research and innovation work still has insufficient original innovation capabilities. , poor transformation mechanism of scientific and technological achievements, etc., there is a big gap with many high-tech developed countries. Innovate a way. With the development of science and technology and the maturity of product manufacturing technology in the industry, all conventional products in the industry have completed the independent design, production and manu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K5/18B23K5/213B23K35/30C22C38/02C22C38/04C22C38/58C22C38/40B23K103/04
CPCB23K5/18B23K5/213B23K35/3046C22C38/02C22C38/04C22C38/58C22C38/40B23K2103/05Y02E30/30
Inventor 文仲波隆冬刘祥军许禄全杨东何芬董军余勇吴丹冯雨来贺小锋文凡李飞许德星杨帆王浩宇王东力姜占宏丁杰
Owner DONGFANG TURBINE CO LTD
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