Unlock instant, AI-driven research and patent intelligence for your innovation.

Composite powder of open arc surfacing welding austenite high-chromium alloy and application method of composite powder

A high-chromium alloy and austenitic welding technology, which is applied in the field of composite powder particles of austenitic high-chromium alloy by open arc surfacing, can solve the problems of high cost, uneconomical, high price, etc., and achieve good toughness and cost reduction Effect

Active Publication Date: 2019-12-10
XIANGTAN UNIV
View PDF8 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Composite powder of open arc surfacing welding austenite high-chromium alloy and application method of composite powder
  • Composite powder of open arc surfacing welding austenite high-chromium alloy and application method of composite powder
  • Composite powder of open arc surfacing welding austenite high-chromium alloy and application method of composite powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0041] Then, add the sodium silicate type water gla...

Embodiment 2

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

[0054] Then, add the sodium silicate type wat...

Embodiment 3

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

[0060] Then, add the sodium silicate type water glass of 5ml Baume degree 35...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
diameteraaaaaaaaaa
modulusaaaaaaaaaa
Login to View More

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 in particular relates to a composite powder for open-arc surfacing welding austenitic high-chromium alloy and an application method thereof. Background technique [0002] As the most widely used wear-resistant surfacing material, high-chromium alloy is mainly used for wear-resistant parts such as liners and concrete pipes because of its good wear resistance and corrosion resistance. Its main wear-resistant phase is (Fe, Cr) 23 C 6 、(Fe,Cr) 7 C 3 and (Fe,Cr) 3 C, usually abbreviated as M 23 C 6 , M 7 C 3 and M 3 C, 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 alloys has three types: ferrite, martensite and austenite, among which ferrite is the main body, while austenite is less. Among these three types of matrix, although ma...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(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