Stainless steel 347 metal core welding wire with low hexavalent chrome emission and preparation method of welding wire

A hexavalent chromium, metal core technology, applied in metal processing equipment, welding equipment, welding equipment and other directions, can solve the problems of increasing welding wire production and stainless steel welding costs, and achieves reduction of welding spatter, small spatter, and beautiful weld formation. Effect

Active Publication Date: 2013-07-31
栗卓新
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Problems solved by technology

[0005] Compared with flux-cored welding wire, stainless steel metal-cored wire, a large number of studies have proved that Cr in welding fume and fume +6 The metal cored wire is much smaller than the flux cored wire. In addition, the current stainless steel flux cored wire is made of stainless steel strip as the sheath, and is made of stainless steel wire through rolling and drawing processes. The application of stainless steel strip increases the production and production of welding wire. The cost of welding stainless steel, therefore, to develop a low hexavalent chromium (Cr +6 ) emissions, the excellent welding process of stainless steel metal cored wire 347 is of great significance

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  • Stainless steel 347 metal core welding wire with low hexavalent chrome emission and preparation method of welding wire
  • Stainless steel 347 metal core welding wire with low hexavalent chrome emission and preparation method of welding wire
  • Stainless steel 347 metal core welding wire with low hexavalent chrome emission and preparation method of welding wire

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[0025] 1. A low Cr +6 The discharged stainless steel metal cored wire, relative to the total mass of the wire, contains (mass fraction wt.%): C: 0.037wt.%; Cr: 53wt.%; Ni: 27wt.%; Mn: 4wt.%; Si: 0.68wt.%; Ti: 0.6wt.%; Zn: 0.9wt.%; Zr: 0.5wt.%; Nb: 0.6; The filling rate of the powder in the steel belt is 30%. Using 98%Ar+2%O 2 The welding process parameters of gas shielded welding are: voltage 26V; current 220A; wire feeding speed 400mm / min; gas flow rate 20L / min; the distance from the welding wire to the contact tip is 20mm. The main components of the deposited metal prepared by the above process are: Cr: 20wt.%; Ni: 10wt.%; Mn: 1.8wt.%; Si: 0.45wt.%;

[0026] 2. A low Cr +6 The discharged stainless steel metal cored wire, relative to the total mass of the wire, contains (mass fraction wt.%): C: 0.025wt.%; Cr: 57wt.%; Ni: 26wt.%; Mn: 5wt.%; Si: 1wt.%; Ti: 0.5wt.%; Zn: 1.5wt.%; Zr: 0.6wt.%; Nb: 0.57wt.%; The filling rate of the powder in the steel belt is 38%. Using 98%A...

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Abstract

A stainless steel 347 metal core welding wire with low hexavalent chrome emission and a preparation method of the welding wire are suitable for the field of welding materials. The welding wire comprises the following components: 0.025-0.07wt.% of C, 45-60wt.% of Cr, 25-31wt.% of Ni, 4-7wt.% of Mn, 0.66-1.5wt.% of Si, 0.3-2wt.% of Ti, 0.3-2wt.% of Zn, 0.3-2wt.% of Zr, 0.25-1.2wt.% of Nb, and the balance of Fe and unavoidable impurities. The welding wire and the preparation method ensure that the mechanical property of welding wire deposited metal is matched with that of base metal, and a stainless steel belt is replaced with a carbon steel belt, so that the cost is lowered; 30-60% of the total amount of hexavalent chrome (Cr<+6>) in welding fume is reduced; a welding operation environment is improved; and in addition, the welding wire and the preparation method have the advantages that splattering is low, and the combination property of the formed deposited metal is excellent.

Description

technical field [0001] The invention relates to the field of 347 (L) welding materials suitable for welding 18%Cr-8%Ni-Nb stainless steel (SUS347, etc.) and 18%Cr-8%Ni-Ti stainless steel, especially relates to the low six Chromium (Cr +6 ) content of gas shielded stainless steel 347 metal cored wire. Background technique [0002] Due to the high content of Cr in stainless steel, when welding stainless steel, the welding material will add an appropriate amount of Cr element in order to meet the corrosion resistance of the weld. By promoting the surface layer of oxides, the weld will produce sufficient corrosion resistance to meet the welding requirements. However, the Cr in the welding material and the base metal evaporates into the welding fume during welding, and will be oxidized by oxygen at high temperature into toxic Cr +6 . [0003] Cr +6 It is carcinogenic in the human body and can cause many other health problems, such as inhalation of certain higher concentration...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/368B23K9/04B23K9/16
Inventor 栗卓新白建涛李国栋李辉李红焦俊
Owner 栗卓新
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