Metal powder core welding wire for atmosphere corrosion resistant fire-resistant steel

A kind of atmospheric corrosion resistance, metal powder core technology, used in metal processing equipment, welding media, welding equipment and other directions, can solve the problems of strength and stiffness decline, causing disasters, collapse of steel structure buildings, etc., to achieve high low temperature impact toughness, The effect of high temperature resistance ability and atmospheric corrosion resistance ability

Inactive Publication Date: 2020-04-21
天津大桥金属焊丝有限公司 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The problems of anticorrosion and fire prevention of large steel structures are becoming more and more prominent. Under the high temperature of fire, the strength and stiffness of steel will decrease significantly, and the collapse of steel structure buildings will easily cause disasters. Fire-resistant and weather-resistant steel refers to the high-temperature strength of steel. As well as the ability to resist atmospheric corrosion in bad weather, the strength of ordinary steel will drop by 30%-65% at an ambient temperature of 350°C-600°C, and will completely lose its bearing capacity

Method used

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  • Metal powder core welding wire for atmosphere corrosion resistant fire-resistant steel
  • Metal powder core welding wire for atmosphere corrosion resistant fire-resistant steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A metal powder cored welding wire for atmospheric corrosion resistant refractory steel, its chemical composition includes: C: 0.04%, Mn: 0.82%, Si: 0.35%, Ni: 0.72%, Mo: 0.47, Cu: 0.18 %, B: 0.002%, Ti: 0.09%, S: 0.006%, P: 0.012%, and the balance of Fe.

[0034] A metal powder-cored welding wire for atmospheric corrosion-resistant refractory steel, the manufacturing method of which specifically includes the following steps:

[0035] S1. First, use desulfurized molten iron to control the sulfur content of the molten iron in the furnace, and then adopt the method of converter steelmaking, select raw materials with low S and P content, and adopt the top-bottom composite blowing process to convert the C, S and P at the end of the smelting controlled at a low level;

[0036] S2. After deoxidation and alloying, the molten steel whose composition meets the requirements is smelted by the out-of-furnace refining process of the ladle refining furnace. The molten steel is fully ...

Embodiment 2

[0039] A metal powder cored welding wire for atmospheric corrosion resistant refractory steel, its chemical composition includes: C: 0.05%, Mn: 0.71%, Si: 0.42%, Ni: 1.31%, Mo: 0.31, Cu: 0.27 %, B: 0.003%, Ti: 0.07%, S: 0.008%, P: 0.013%, and the balance of Fe.

[0040] A metal powder-cored welding wire for atmospheric corrosion-resistant refractory steel, the manufacturing method of which specifically includes the following steps:

[0041] S1. First, use desulfurized molten iron to control the sulfur content of the molten iron in the furnace, and then adopt the method of converter steelmaking, select raw materials with low S and P content, and adopt the top-bottom composite blowing process to convert the C, S and P at the end of the smelting controlled at a low level;

[0042] S2. After deoxidation and alloying, the molten steel whose composition meets the requirements is smelted by the out-of-furnace refining process of the ladle refining furnace. The molten steel is fully ...

Embodiment 3

[0045] A metal powder cored welding wire for atmospheric corrosion-resistant refractory steel, its chemical composition includes: C: 0.04%, Mn: 0.43%, Si: 0.64%, Ni: 1.77%, Mo: 0.28%, Cu: 0.32%, B: 0.004%, Ti: 0.08%, S: 0.01%, P: 0.012%, and the balance of Fe.

[0046] A metal powder-cored welding wire for atmospheric corrosion-resistant refractory steel, the manufacturing method of which specifically includes the following steps:

[0047] S1. First, use desulfurized molten iron to control the sulfur content of the molten iron in the furnace, and then adopt the method of converter steelmaking, select raw materials with low S and P content, and adopt the top-bottom composite blowing process to convert the C, S and P at the end of the smelting controlled at a low level;

[0048] S2. After deoxidation and alloying, the molten steel whose composition meets the requirements is smelted by the out-of-furnace refining process of the ladle refining furnace. The molten steel is fully p...

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Abstract

The invention discloses a metal powder core welding wire for atmosphere corrosion resistant fire-resistant steel. The metal powder core welding wire comprises the following chemical components in percentage by weight: 0.02-0.08% of C, 0.43-1.5% of Mn, 0.20-0.80% of Si, 0.72-2.0% of Ni, 0.28-0.8% of Mo, 0.1-0.5% of Cu, 0.002-0.008% of B, 0.02-0.09% of Ti, 0.006-0.01% of S, 0.008-0.014 % of P, and the balance Fe. The invention relates to the technical field of welding materials. The metal powder core welding wire for the atmosphere corrosion resistant fire-resistant steel is characterized in that weld metal has high-temperature resistance and atmosphere corrosion resistance, and the requirement of low-temperature impact toughness is higher than the requirements of steel with the same grade;the metal analysis welding wire gives consideration to the welding of fire-resistant and weather-resistant steel, and meanwhile, obtains the weld metal with excellent low-temperature toughness throughusing the metal powder core welding wire; and through optimal combination of all elements in the metal powder core welding wire, the composition of alloy elements in the metal powder core welding wire preferably reaches the welding requirements of the fire-resistant and weather-resistant steel.

Description

technical field [0001] The invention relates to the technical field of welding materials, in particular to a metal powder-cored welding wire for atmospheric corrosion-resistant refractory steel. Background technique [0002] The problems of anticorrosion and fire prevention of large steel structures are becoming more and more prominent. Under the high temperature of fire, the strength and stiffness of steel will decrease significantly, and the collapse of steel structure buildings will easily cause disasters. Fire-resistant and weather-resistant steel refers to the high-temperature strength of steel. As well as the ability to resist atmospheric corrosion in bad weather, the strength of ordinary steel will drop by 30%-65% at an ambient temperature of 350°C-600°C, and will completely lose its bearing capacity. Refractory steel refers to the same level of steel with the same mechanical properties at room temperature. When the ambient temperature reaches about 600 ° C for 2-3 ho...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/3053B23K35/40
Inventor 郑子行李志提姚旭张熹杨天文马恒胜田兆亭孙珊
Owner 天津大桥金属焊丝有限公司
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