Cr13 series overlay welding self-protection flux-cored wire

A technology of flux-cored welding wire and self-protection, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., to achieve good weld formation, good self-protection effect, and good slag coverage

Inactive Publication Date: 2007-08-08
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The development of high-fluoride alkaline slag-based self-shielded surfacing flux-cored welding wire has not yet been reported on patents at home and abroad.

Method used

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  • Cr13 series overlay welding self-protection flux-cored wire

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: Select 14×0.3 (14 mm in width and 0.3 mm in thickness) H08 carbon steel strip. Roll it into a U shape first. 10 grams of calcium fluoride powder, 20 grams of barium fluoride powder, 1 gram of sodium carbonate powder, 30 grams of metal chromium powder, 8 grams of iron powder, 5 grams of metal manganese powder, 3 grams of high-carbon ferrochromium powder, aluminum-magnesium alloy powder 14 grams, 7 grams of potassium titanate powder, and 2 grams of magnesia powder (the powders all passed through a 60-mesh sieve) were mixed. Fully mix in the powder mixer, add to the U-shaped tank, so that the powder addition coefficient is 30%. Close the U-shaped groove so that the powder is wrapped in it. Then make it pass through the drawing dies with diameters of 4.2mm, 3.6mm, 3.3mm, 3.15mm, 2.95mm, 2.7mm, 2.5mm, 2.3mm, 2.1mm, 1.96mm, drawing and reducing the diameter one by one, and finally Make it 2.0mm in diameter. Welding without protective gas, surfacing four laye...

Embodiment 2

[0024] Embodiment 2: H08 carbon steel strip of 14×0.4 (width 14mm, thickness 0.4mm) is selected. Roll it into a U shape first. 15 grams of calcium fluoride powder, 15 grams of barium fluoride powder, 2 grams of sodium carbonate powder, 35 grams of metal chromium powder, 5 grams of iron powder, 4 grams of metal manganese powder, 6 grams of high-carbon ferrochromium powder, aluminum-magnesium alloy powder 8 grams, 5 grams of potassium titanate powder, and 5 grams of magnesia powder (the powders all passed through an 80-mesh sieve) were mixed. Fully mix in the powder mixer, add to the U-shaped tank, so that the powder addition coefficient is 20%. Close the U-shaped groove so that the powder is wrapped in it. Then make it pass through the drawing dies with diameters of 4.2mm, 3.6mm, 3.3mm, 3.15mm, 2.95mm, 2.7mm, 2.5mm, 2.3mm, 2.1mm, 1.96mm, drawing and reducing the diameter one by one, and finally Make it 2.0mm in diameter. Welding without protective gas, the welding current i...

Embodiment 3

[0025] Embodiment 3: H08 carbon steel strips of 10×0.3 (width 10 mm, thickness 0.3 mm) are selected. Roll it into a U shape first. 10 grams of calcium fluoride powder, 20 grams of barium fluoride powder, 1.5 grams of sodium carbonate powder, 40 grams of metal chromium powder, 3 grams of iron powder, 4 grams of metal manganese powder, 4.5 grams of high-carbon ferrochrome powder, aluminum-magnesium alloy powder 10 grams, 4 grams of potassium titanate powder, and 3 grams of magnesia powder (the powders all passed through a 80-mesh sieve) were mixed. Fully mix evenly in the powder mixer, add to the U-shaped tank, so that the powder addition coefficient is 25%. Close the U-shaped groove so that the powder is wrapped in it. Then make it pass through drawing dies with diameters of 2.8mm, 2.6mm, 2.4mm, 2.25mm, 2.1mm, and 1.96mm, draw and reduce the diameter one by one, and finally make the diameter reach 2.0mm. Welding without protective gas, the welding current is 250-350A, the we...

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Abstract

The invention relates to the Cr13 series build-up self-shielded welding wire aiming to solve the wastes of material, low production efficiency, complex equipment and high cost of existing build-up welding material. It features in the mass percentage of calcium fluoride 10-20%, barium fluoride 10-20%, soda 1-2%, chrome metal 30-40%, metal powder 3-10%, manganese metal 3-5%, high carbon ferro-chrome 0-6%, Al-Mg alloy 8-14%, potassium titanate 3-7%, magnesia 2-5%. It has stable electric arc, good welding seam, easy for slag peeling clinker coating, with good self-shield effect in the welding process.

Description

technical field [0001] The invention belongs to the field of welding in material processing engineering, and uses carbon steel strips to wrap alloy powders to manufacture self-shielding flux-cored welding wires whose deposited metals are Cr13 series 1Cr13 and 2Cr13 types. The invention is mainly applied to the repair welding of shafts, valves and other materials working under heat-resistant, corrosion-resistant and wear-resistant working conditions. Background technique [0002] In recent years, remanufacturing technology has been greatly developed and widely used. Large parts working under harsh conditions can be repaired by surfacing welding methods to restore their performance and prolong their service life, which greatly saves resources and reduces production costs. Cr13 stainless steel has good comprehensive properties of corrosion resistance, heat resistance and wear resistance, and is widely used in the production of important parts such as wheel shafts, pressure vess...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/368
Inventor 栗卓新张征李国栋魏琪李红
Owner BEIJING UNIV OF TECH
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