Composite powder for open arc surfacing welding austenitic high chromium alloy and application method thereof

A high-chromium alloy and austenite welding technology is applied in the field of open-arc surfacing welding of composite powders of austenitic high-chromium alloys, which can solve the problems of uneconomical, high cost, and high price, and achieve low cost and good toughness. Effect

Active Publication Date: 2021-01-12
XIANGTAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the matrix of cobalt-based and nickel-based alloys is austenite, but the price is too high. The actual surfacing production is only suitable for high-temperature wear-resistant workpieces, and is generally not used in conventional wear-resistant abrasive wear conditions, mainly because of its high cost. Extremely uneconomical

Method used

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  • Composite powder for open arc surfacing welding austenitic high chromium alloy and application method thereof
  • Composite powder for open arc surfacing welding austenitic high chromium alloy and application method thereof
  • Composite powder for open arc surfacing welding austenitic high chromium alloy and application method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040]Before weighing, the powder components such as high-carbon ferrochromium, ferro-vanadium, ferrosilicon, flake graphite and reduced iron powder are passed through a 60-mesh sieve, and aluminum powder is passed through a 300-mesh sieve. The composition ratio (weight percentage) of the powder components contained in the composite powder particles is: high-carbon ferrochrome 75%, ferro-vanadium 10%, ferrosilicon 2%, flake graphite 6%, aluminum powder 0.5%, reduced iron powder 6.5 %. Weigh high-carbon ferrochromium, ferro-vanadium, ferrosilicon, flake graphite, aluminum powder and reduced iron powder according to the requirements of the powder components contained in the above-mentioned composite powder, and then weigh all the above-mentioned powders The components are put into the same container and stirred thoroughly to make them evenly mixed to form a mixed powder.

[0041]Next, add 5ml of sodium silicate type water glass with Baume degree 40 and modulus 3.0 to the above mixed powd...

Embodiment 2

[0053]Before weighing, the powder components such as high-carbon ferrochromium, ferro-vanadium, ferrosilicon, flake graphite and reduced iron powder are passed through a 60-mesh sieve, and aluminum powder is passed through a 300-mesh sieve. The composition ratio (weight percentage) of the powder components contained in the composite powder is: high carbon ferrochrome 70%, ferro-vanadium 8.5%, ferrosilicon 3%, flake graphite 6.5%, aluminum powder 0.75%, reduced iron powder 11.25 %. Weigh high-carbon ferrochromium, ferro-vanadium, ferrosilicon, flake graphite, aluminum powder, and reduced iron powder according to the ratio requirements of the powder components contained in the above composite powder particles, and then weigh all the above-mentioned powders The components are put into the same container and stirred thoroughly to make them evenly mixed to form a mixed powder.

[0054]Next, add 5ml of sodium silicate type water glass with Baume 30 and modulus 3.3 to the above mixed powder e...

Embodiment 3

[0059]Before weighing, the powder components such as high-carbon ferrochromium, ferro-vanadium, ferrosilicon, flake graphite and reduced iron powder are passed through a 60-mesh sieve, and aluminum powder is passed through a 300-mesh sieve. The composition ratio (weight percentage) of the powder components contained in the composite powder is: 73% high carbon ferrochrome, 8% ferro-vanadium, 1% ferrosilicon, 5.5% flake graphite, 1.0% aluminum powder, and 11.5 reduced iron powder %. Weigh high-carbon ferrochromium, ferro-vanadium, ferrosilicon, flake graphite, aluminum powder and reduced iron powder according to the requirements of the proportion of powder components contained in the above composite powder, and then weigh all the above-mentioned powder components Place them in the same container and stir thoroughly to make them evenly mixed to form a mixed powder.

[0060]Next, add 5ml of sodium silicate type water glass with Baume degree 35 and modulus 3.3 to each of the above-mentioned...

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Abstract

The invention provides composite powder of an open arc surfacing welding austenite high-chromium alloy and an application method of the composite powder. The high-chromium alloy with austenite as themain matrix is formed by conducting self-protection open arc welding with the composite powder of a specific particle size and an H08A solid welding wire as welding materials, wherein the composite powder is formed through the steps of powder component sieving and weighing, powder component dry mixing, mixed powder and added water glass wet mixing, powder body rotation bonding and granulating, powder particle low-temperature sintering, powder particle sieving and the like, and the H08A solid welding wire serves as an electric arc carrier. The powder filling rate ratio and the current value ofthe surfacing welding alloy are set in an optimal manner, and therefore the fusion degree of composite powder melt and solid welding wire molten drop melt is controlled, the composite powder melt andthe solid welding wire molten drop melt cannot be completely fused, and the high-chromium alloy with the organization structure characteristics that the austenite is used as the main matrix and blockyor granular (Cr, Fe, V)7C3 is distributed in the austenite in a dispersive manner is formed. The prepared austenite high-chromium alloy has good abrasion resistance and organization equilibrium, completely meets practical requirements and can be used for part open arc surfacing welding abrasion-resistant alloys under the impulsive load abrasive wear working condition.

Description

Technical field[0001]The invention belongs to the technical field of wear-resistant surfacing welding, and particularly relates to a composite powder particle for open arc surfacing welding austenitic high-chromium alloy and an application method thereof.Background technique[0002]As one of the most widely used wear-resistant surfacing materials, high-chromium alloys are mainly used for wear-resistant parts such as liners and concrete pipes because of their good wear resistance and corrosion resistance. Its main wear-resistant phase is (Fe, Cr)23C6, (Fe,Cr)7C3And (Fe, Cr)3C, usually abbreviated as M23C6, M7C3And M3C, where M contains metal elements such as Fe and Cr, and its hardness and phase toughness change with the content of chromium and other elements.[0003]The matrix of high chromium alloy has three types: ferrite, martensite and austenite, among which ferrite is the main body, while austenite is less. Among these three kinds of matrix, although martensite has high strength, h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K9/04B23K35/40
CPCB23K9/04B23K35/308B23K35/40
Inventor 龚建勋刘超姚惠文程诗尧黄洪江
Owner XIANGTAN UNIV
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