Flux-cored wire for overlay welding of forging die and application thereof

A flux-cored welding wire and mold technology, which is applied in the direction of manufacturing tools, welding media, welding equipment, etc., can solve the problems of high temperature service performance restricting the service life of forging molds, and achieve improved production efficiency, good surfacing welding processability, and stable arc Effect

Inactive Publication Date: 2013-04-03
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional forging die steel is a homogeneous material, the limitation of its high temperature service performance seriously restricts the improvement of the service life of the forging die

Method used

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  • Flux-cored wire for overlay welding of forging die and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Get 400g of calcium fluoride, 50g of soda ash, 50g of quartz, 200g of rutile, 1360g of high-carbon ferrochrome, 1390g of pure chromium powder, 220g of pure nickel powder, 180g of electrolytic manganese, 630g of molybdenum iron powder, 210g of ferrosilicon powder, 60g of ferrosilicon powder, Reduced iron powder 5250g. Put the obtained flux core powder into the U-shaped steel belt groove, the filling rate is 35%, close the U-shaped groove to obtain the surfacing welding flux-cored wire with a diameter of 2.4mm, and prepare the surfacing layer according to the above process, and the obtained The alloy composition in the deposited metal is: C: 0.2wt.%; Cr: 7.8wt.%; Ni: 0.7wt.%; Mn: 0.5wt.%; Mo: 1wt.%; Si: 0.3wt.%; : 0.1wt.%; Fe: balance.

Embodiment 2

[0023] Take 500g of calcium fluoride, 100g of soda ash, 100g of quartz, 300g of rutile, 1700g of high-carbon ferrochrome powder, 1490g of pure chromium powder, 320g of pure nickel powder, 250g of electrolytic manganese, 660g of molybdenum iron powder, 280g of ferrosilicon powder, and 90g of ferrosilicon powder , Reduced iron powder 4210g. Put the obtained flux core powder into the U-shaped steel belt groove, the filling rate is 35%, close the U-shaped groove to obtain the surfacing welding flux-cored wire with a diameter of 2.4mm, and prepare the surfacing layer according to the above process, and the obtained The alloy composition in the deposited metal is: C: 0.25wt.%; Cr: 8.2wt.%; Ni: 1wt.%; Mn: 0.7wt.%; Mo: 1.5wt.%; : 0.15wt.%; Fe: balance.

Embodiment 3

[0025] Take 600g of calcium fluoride, 200g of soda ash, 350g of quartz, 500g of rutile, 2380g of high-carbon ferrochrome powder, 1890g of pure chromium powder, 480g of pure nickel powder, 360g of electrolytic manganese, 1100g of ferromolybdenum powder, 430g of ferrosilicon powder, and 160g of ferrosilicon powder , 1550g of reduced iron powder. Put the obtained flux core powder into the U-shaped steel belt groove, the filling rate is 35%, close the U-shaped groove to obtain the surfacing welding flux-cored wire with a diameter of 2.4mm, and prepare the surfacing layer according to the above process, and the obtained The alloy composition in the deposited metal is: C: 0.35wt.%; Cr: 11.4wt.%; Ni: 1.5wt.%; Mn: 1.0wt.%; Mo: 2.5wt.%; Si: 0.6wt.%; V: 0.25 wt.%; Fe: balance.

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Abstract

The invention discloses a flux-cored wire for overlay welding of a forging die and an application thereof, and belongs to the technical field of material processing welding materials. Flux core powder is coated with a carbon steel belt; the filling rate of the flux-cored wire is 30-37 percent; and the flux core powder comprises the following substances in percentage by mass: 4-7 percent of calcium fluoride, 0.5-3 percent of soda ash, 0.5-4 percent of quartz, 2-6 percent of rutile, 13.6-27.2 percent of high-carbon ferro-chrome, 13.9-19.2 percent of pure chromium powder, 2.2-5.7 percent of nickel powder, 1.8-4.3 percent of electrolytic manganese, 6.3-13.2 percent of ferromolybdenum powder, 2.1-5.0 percent of ferrosilicon powder, 0.6-1.9 percent of vanadium iron powder, and the balance of reduced iron powder. The welding wire has very high high-temperature hardness and heat-fatigue resistance, and continuous welding can be realized.

Description

technical field [0001] The invention belongs to the field of welding materials for material processing, and in particular relates to a flux-cored welding wire used for overlay welding of forging dies, which has the characteristics of high welding efficiency and good process performance. Background technique [0002] Forging molds generally need to be repaired after thousands of times of use. The repaired mold can reach or even exceed the service life before the repair. At present, the repairing of forging dies in China mainly uses surfacing electrodes, which is inefficient. The use of flux-cored wire repair can realize continuous welding and improve production efficiency. The welding slag of flux-cored wire is far less than that of welding rod, which improves the deposition rate and reduces the workload of slag removal. [0003] The traditional forging die steel is a homogeneous material, and the limitation of its high temperature service performance seriously restricts t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/368B23K35/40B23K9/04B23K9/173
Inventor 蒋建敏贺定勇孙昊周正赵秋颖崔丽王智慧李晓延
Owner BEIJING UNIV OF TECH
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