High chromium rust free, wear resistance cored welding wire

A technology of flux-cored welding wire and high chromium, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of poor crack resistance, no hardness of wear-resistant materials, etc., and achieve good corrosion resistance

Inactive Publication Date: 2007-10-17
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As we all know, high chromium cast iron is a very wear-resistant material, but its crack resistance is also extremely poor. Ferritic stainless steel electrode is an excellent high-temperature oxidation-resistant material. Because it is a connecting electrode, its crack resistance is very poor. Well, it is incomparable to high-chromium cast iron flux-cored wire, but it does not have the hardness of wear-resistant materials, and it cannot be used as wear-resistant materials for surfacing welding. If they can concentrate their respective advantages and overcome their respective shortcomings, between them It is a pioneering work with great development prospects to study a new type of flux-cored welding wire with good wear resistance, corrosion resistance and crack resistance and high practical value.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: The outer sheath of the welding wire is an H08A steel strip with a width of 16 mm and a thickness of 0.35 mm. The weight ratio of welding wire powder core formula is: high carbon ferrochrome 38, micro carbon ferrochrome 32, metal chromium powder 17, molybdenum ferro4, vanadium ferro3, tungsten carbide 6, boron iron 8, nickel powder 2, niobium powder 4, rare earth Silicon 2, the welding wire filling amount is 0.51, the outer diameter is φ3.8mm; Submerged arc welding machine is used for surfacing welding, the surfacing welding current is 380A, the flux is 260, the test plate is ordinary low carbon steel, the size is 200×100×20mm, The surfacing single pass is 150mm long, the average hardness of the deposited metal is HRC54, and the surfacing layer has no visible cracks. The test plate is placed in a 900°C high-temperature furnace for 4 hours and then cooled to room temperature with the furnace. There is no common matrix in the surfacing metal The material has...

Embodiment 2

[0025] Embodiment 2: The outer sheath of the welding wire is an H08A steel strip with a width of 16 mm and a thickness of 0.35 mm. The weight ratio of welding wire powder core formula is: high carbon ferrochrome 36, micro carbon ferrochrome 30, metal chromium powder 16, molybdenum ferro2, vanadium ferro4, tungsten carbide 5, boron iron 7, nickel powder 2, niobium powder 5, rare earth Silicon 3, the filling amount of the welding wire is 0.52, and the outer diameter of the welding wire is drawn to φ3.2mm; the submerged arc welding machine is used for surfacing welding, the surfacing welding current is 380A, and the flux is 260. 150mm long, the average hardness of the deposited metal is HRC53, and the surfacing layer has no visible cracks. The test plate is placed in a high-temperature furnace at 800°C for 4 hours. When the test plate is put into the furnace, 5g of sulfur is also put into the furnace. , to create a sulfur corrosion atmosphere, when the temperature and time are re...

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PUM

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Abstract

The antiwear stainless cored high chromium wire has coat of low carbon steel and powder core comprising high carbon ferrochromium 36-42 wt%, micro carbon ferrochromium 26-32 wt%, metal Cr powder 15-17 wt%, ferromolybdenum 2-4 wt%, ferrovanadium 3-5 wt%, tungsten carbide 4-6 wt%, ferroboron 5-8 wt%, nickel powder 2-4 wt%, niobium powder 2-5 wt% and RE silicon 2-3 wt%, and with one welding wire filling amount of 0.49-0.52. The present invention results in raised comprehensive welding performance and raised welding quality, high anticossive performance, high anticracking performance and average fused-on metal hardness of HRC54, and may be applied widely in build-up welding field requiring high antiwear, anticorrosive and anticracking performance.

Description

technical field [0001] The invention relates to a metal welding material, in particular to a high-chromium stainless wear-resistant flux-cored welding wire. Background technique [0002] There is a high-chromium cast iron wear-resistant flux-cored welding wire and a ferritic stainless steel electrode with a chromium content of 28% in the market. As we all know, high chromium cast iron is a very wear-resistant material, but its crack resistance is also extremely poor. Ferritic stainless steel electrode is an excellent high-temperature oxidation-resistant material. Because it is a connecting electrode, its crack resistance is very poor. Well, it is incomparable to high-chromium cast iron flux-cored wire, but it does not have the hardness of wear-resistant materials, and it cannot be used as wear-resistant materials for surfacing welding. If they can concentrate their respective advantages and overcome their respective shortcomings, between them It is a pioneering work with gr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/24
Inventor 张清辉肖逸锋
Owner XIANGTAN UNIV
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