High-chromium-manganese austenitic steel alkalescent full-position gas-protection flux-cored wire

A technology of flux-cored welding wire and austenitic steel, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., and can solve the problems of poor process performance of basic welding wire, poor welding process performance, and low welding production efficiency, etc. problems, to achieve excellent slag removal, high welding production efficiency, and good weld formation

Inactive Publication Date: 2009-05-13
TIANJIN SAINTEAGLE WELDING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, this kind of welding material mainly uses welding rods, but it has two obvious deficiencies in the welding production process: 1. Low welding production efficiency; 2. Poor welding process performance
Flux-cored welding wire can make up for these

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] A high-chromium-manganese type austenitic steel basic all-position gas-shielded flux-cored welding wire, including a 0Cr17 stainless steel strip sheath and a flux core, and the flux core is made by mixing the following components by weight percentage:

[0012] 5% rutile, 4% feldspar, 0.5% sodium carbonate, 9.5% fluorite, 1.5% sodium fluorosilicate, 44% manganese powder, 2% chromium powder, 15% nickel powder, 4% graphite, 10% ferromolybdenum ( The weight percentage of molybdenum is 60%), 75# ferrosilicon 1%, iron powder 3.5%; the filling rate of the prepared flux-cored wire is 28-32%, and the diameter of the wire is φ1.2mm.

[0013] Technical effect: All-position welding, stable arc, less spatter, beautiful shape, easy slag removal, no pores, slag inclusions and other defects, chemical composition of deposited metal: 1.00% C, 12.32% Mn, 12.06% Cr, 0.68% Si, 4.50% Ni, 1.79% Mo, 0.003% S, 0.03% P, as-welded hardness HRC34, surface hardness can reach HRC53 after strong impa...

Embodiment 2

[0015] A high-chromium-manganese type austenitic steel basic all-position gas-shielded flux-cored welding wire, including a 0Cr17 stainless steel strip sheath and a flux core, and the flux core is made by mixing the following components by weight percentage:

[0016] 8% rutile, 2% feldspar, 1% sodium carbonate, 12% fluorite, 0.5% sodium fluorosilicate, 55% manganese powder, 9% chromium powder, 5% nickel powder, 2% graphite, 1% molybdenum powder, 45# ferrosilicon 4%, the balance is iron powder; the filling rate of the prepared flux-cored wire is 28-32%, and the diameter of the wire is φ1.2mm.

[0017] Technical effect: All-position welding, stable arc, less spatter, beautiful shape, easy slag removal, no pores, slag inclusions and other defects, chemical composition of deposited metal: 0.45% C, 15.97% Mn, 14.01% Cr, 0.47% Si, 1.21% Ni, 0.28% Mo, 0.003% S, 0.03% P, as-welded hardness HRC22, surface hardness can reach HRC45 after strong impact.

Embodiment 3

[0019] A high-chromium-manganese type austenitic steel basic all-position gas-shielded flux-cored welding wire, including a 0Cr17 stainless steel strip sheath and a flux core, and the flux core is made by mixing the following components by weight percentage: 4% rutile, 5% feldspar, 0.5% sodium carbonate, 10% fluorite, 1% sodium fluorosilicate, 40% manganese powder, 12% chromium powder, 3% graphite, 4.5% ferrosilicon, and the balance is iron powder. The weight percent content of silicon in iron is 45%. The welded state hardness of the deposited metal is HRC24, and the surface hardness can reach HRC47 after strong impact.

[0020] The filling rate of the flux-cored wire is 28-32%. The diameter of the welding wire is 1.2 mm.

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Abstract

The invention discloses a high chromium and manganese type austenite steel alkali full-position gas shielded flux-cored wire, which comprises a 0Cr17 stainless steel band sheath and flux cored, wherein, the flux cored is prepared by mixing the following components by the weight percentages: 4-10 percent of rutile, 1-5 percent of feldspar, 0.5-2 percent of sodium carbonate, 8-15 percent of fluorspar, 0.5-1.5 percent of sodium fluosilicate, 40-68 percent of manganese powder or low carbon ferromanganese, 1.5-20 percent of chromium powder, 0-15 percent of nickel powder, 2-4 percent of graphite, 0-15 percent of molybdenum powder or ferromolybdenum, 0.5-4.5 percent of ferrosilicon and iron powder in balancing amount. The invention has the advantages that the ductility of the welding wire is good, the diameter is small, the small-scale welding can be conducted, the impurity content is low, and the hot cracking resistance is good; meanwhile, the splashing degree of the welding wire is low, the welding mold is good, the slag detachability is good, the excellent processing property such as the full-position welding can be conducted, and the production efficiency of the welding is high.

Description

technical field [0001] The invention relates to a gas-shielded flux-cored welding wire, in particular to an alkaline all-position gas-shielded flux-cored welding wire for high-chromium-manganese type austenitic steel. Background technique [0002] The surfacing metal structure of high-chromium-manganese austenitic steel welding materials is pure austenite in the welded state, which has good toughness and strong machinability. HRC45~55, and the austenite structure with good toughness is still under the hardened layer. Therefore, it is mainly used for welding thermal shears and hot saws resistant to high temperature impact wear; valve sealing surfaces resistant to medium temperature and high pressure; water turbine blades resistant to cavitation at room temperature; also suitable for surfacing welding of high manganese steel with high wear resistance and toughness requirements. , such as screw conveying mechanism, bulldozer blade, grab bucket, crushing blade, etc. At present...

Claims

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Application Information

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IPC IPC(8): B23K35/36
Inventor 安静
Owner TIANJIN SAINTEAGLE WELDING CO LTD
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