G115 argon arc welding wire for heat-resistant steel

A technology of heat-resistant steel and argon arc, which is applied in the direction of welding equipment, welding medium, welding/cutting medium/material, etc., can solve the problems of argon arc welding solid wire blank, etc., and achieve excellent welding process performance and weld metal flow Good performance and small splash effect

Active Publication Date: 2020-01-17
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The applicant disclosed an arc welding electrode for martensitic heat-resistant steel in the patent document with the application number: 201610827615.0 and the invention name "A welding rod for martensitic heat-resistant steel", but the corresponding argon arc welding Core wire remains blank

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The chemical composition and weight percentage of welding wire are: C 0.09%; Si 0.3%; Mn 0.7%; P 0.002%; S0.001%; ​​Cr 8.8%; W 2.9%; Co 3.0%; Nb 0.05%; 0.5%; N 0.008%; B 0.013%; Ti 0.001%; ​​the balance is Fe and unavoidable impurities. In this embodiment, the welding wire is welded by argon arc welding, protected by high-purity argon gas (≥99.99%), and the welding parameters are: welding current is 130A, arc voltage is 13V, preheating temperature is 120°C, interlayer temperature is 100°C; post-weld heat treatment temperature 760°C. The mechanical properties of the weld metal are: room temperature impact energy 65J; room temperature tensile strength 780MPa, yield strength 600MPa.

Embodiment 2

[0023] The chemical composition and weight percentage of welding wire are: C 0.85%; Si 0.2%; Mn 0.5%; P 0.002%; S0.001%; ​​Cr 9.0%; W 3.3%; Co 3.1%; Nb 0.07%; 0.1%; N 0.007%; B0.014%; Ti 0%; the balance is Fe and unavoidable impurities. In this embodiment, the welding wire is welded by argon arc welding, protected by high-purity argon gas (≥99.99%), and the welding parameters are: welding current is 130A, arc voltage is 13V, preheating temperature is 120°C, interlayer temperature is 100°C; post-weld heat treatment temperature 760°C. The mechanical properties of the weld metal are: room temperature impact energy 62J; room temperature tensile strength 790MPa, yield strength 610MPa.

Embodiment 3

[0025] The chemical composition and weight percentage of welding wire are: C 0.07%; Si 0.3%; Mn 0.6%; P 0.002%; S0.001%; ​​Cr 8.5%; W 3.0%; Co 2.9%; Nb 0.06%; 0%; N 0.007%; B0.012%; Ti 0%; the balance is Fe and unavoidable impurities. In this embodiment, the welding wire is welded by argon arc welding, protected by high-purity argon gas (≥99.99%), and the welding parameters are: welding current is 130A, arc voltage is 13V, preheating temperature is 120°C, interlayer temperature is 100°C; post-weld heat treatment temperature 760°C. The mechanical properties of the weld metal are: room temperature impact energy 70J; room temperature tensile strength 765MPa, yield strength 590MPa.

[0026] The present invention adopts the above scheme, and the welding deposited metal composition not only has a chemical composition similar to that of the base metal, but also has excellent physical and mechanical properties and excellent impact toughness matching the base metal; the welding proces...

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Abstract

The invention discloses an argon arc welding wire for G115 heat resistant steel and belongs to the technical field of welding materials. The argon arc welding wire comprises the components, by weight, of 0.07%-0.09% of C, 0.3% or the less of Si, 0.7% or the less of Mn, 0.002% or the less of P, 0.001% or the less of S, 8.5%-9.5% of Cr, 2.8%-3.3% of W, 2.8%-3.5% of Co, 0.04%-0.08% of Nb, 0.18%-0.25% of V, 0%-0.5% of Cu, 0.007%-0.008% of N, 0.011%-0.014% of B, 0%-0.001% of Ti and the balance Fe and inevitable impurity elements. By means of the combined action of the elements, welding cladding metal components not only have chemical components similar to a base material but also have excellent physical and mechanical properties and good impact toughness matched with the base material; the welding process property is good, spatter is low at the time of welding, metal mobility of a welding seam is good, and the forming property of the welding seam is good; the welding wire is suitable for submerged-arc welding of G115 heat resistant steel.

Description

technical field [0001] The invention belongs to the technical field of solid welding wire for metal material welding, and in particular provides a solid welding wire for argon arc welding of G115 heat-resistant steel, which is especially suitable for argon arc welding of related pipelines of G115 heat-resistant steel. Background technique [0002] Recently, the "Thirteenth Five-Year Plan for Electric Power Development" issued by the Energy Bureau clearly pointed out that by 2020, the total installed capacity of electric power in my country will be 2 billion kilowatts; in terms of power supply structure, the installed capacity of coal power will be controlled within 1.1 billion kilowatts. , although the installed capacity of coal power accounts for 55%, the proportion of coal power generation is still as high as 62%. The plan also shows that the country has made up its mind to transform and upgrade coal power to promote clean and orderly development. Therefore, ultra-supercri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30
CPCB23K35/3086
Inventor 刘正东陈正宗包汉生马龙腾杨钢干勇
Owner CENT IRON & STEEL RES INST
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