Manganese-containing boron iron-based wear-resistant flux-cored wire for surfacing and preparation method of surfacing alloy

A technology of flux-cored welding wire and ferroboron, applied in welding equipment, welding equipment, arc welding equipment, etc., can solve the problems of energy and material consumption, mechanical failure, etc., and achieve the effect of improving wear resistance and hard phase morphology.

Inactive Publication Date: 2012-04-11
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Wear and tear is one of the main causes of mechanical failure, bringing huge energy and material consumption to industry

Method used

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  • Manganese-containing boron iron-based wear-resistant flux-cored wire for surfacing and preparation method of surfacing alloy
  • Manganese-containing boron iron-based wear-resistant flux-cored wire for surfacing and preparation method of surfacing alloy
  • Manganese-containing boron iron-based wear-resistant flux-cored wire for surfacing and preparation method of surfacing alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A manganese-containing and boron-containing wear-resistant surfacing flux-cored welding wire includes SPCC hollow welding wire and a powder flux core. The powder rate was 27%. Set the surfacing welding process parameters as follows: voltage 23-30V; current 200-230A; wire feeding speed: 410-510mm / min; gas flow rate: 18-25L / min; The composition of the surfacing alloy prepared by the above process is: Mn: 5.8wt.%; B: 2.1wt%; C: 0.1wt.%; Fe balance. The average hardness of the obtained surfacing layer is HRC43, and the appearance of the weld seam is beautiful without cracks. see SEM figure 1 , the XRD pattern of the surfacing alloy is shown in figure 2 .

Embodiment 2

[0028] A manganese-containing and boron-containing wear-resistant surfacing flux-cored welding wire includes SPCC hollow welding wire and a powder flux core. The powder rate was 27%. Set the surfacing welding process parameters as follows: voltage 23-30V; current 200-230A; wire feeding speed: 410-510mm / min; gas flow rate: 19-25L / min; The composition of the surfacing alloy prepared by the above process is: Mn: 7.8wt.%; B: 2.1wt%; C: 0.1wt.%; Fe balance. The average hardness of the obtained surfacing layer is HRC46, and the appearance of the welding seam is beautiful without cracks.

Embodiment 3

[0030] A manganese-containing and boron-containing wear-resistant surfacing flux-cored welding wire includes SPCC hollow welding wire and a powder flux core. The powder rate was 27%. Set the surfacing welding process parameters as follows: voltage 23-30V; current 200-230A; wire feeding speed: 410-510mm / min; gas flow rate: 18-25L / min; The composition of the surfacing alloy prepared by the above process is: Mn: 13wt.%; B: 2.1wt%; C: 0.1wt.%; Fe balance. The average hardness of the obtained surfacing layer is HRC44, and the appearance of the welding seam is beautiful without cracks.

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Abstract

The invention discloses a manganese-containing boron iron-based wear-resistant flux-cored wire for surfacing and a preparation method of a surfacing alloy, belonging to the field of machining welding materials. A powder flux core of the flux-cored wire comprises the following components by mass percentage: 25-50% of ferro-boron, 15-40% of electrolytic manganese, and 10-60% of iron powder; an outer belt material of the flux-cored wire is an SPCC (Steel Plate Cold Commercial) steel belt; and the filling rate of the powder flux core in a hollow welding wire is 25-27%. In a process of preparing the surfacing alloy by gas shield welding, the voltage is 22-30V, the current is 190-240A, the wire feeding speed is 410-510mm/min, the gas flow rate is 15-25L/min, and the distance of the welding wireextending out of a current contact nozzle is 19-25mm. The surfacing alloy prepared by the flux-cored wire of the invention contains high-hardness Mn2B and Fe2B, the hardness of the alloy is higher, the wear resistance is improved under an impaction condition, the welding manufacturability is excellent, and the wear resistance of a surfaced metal under the impaction condition is excellent.

Description

technical field [0001] The invention belongs to the field of welding materials for material processing, and relates to a manganese-containing and boron-containing iron-based wear-resistant surfacing flux-cored welding wire, which is used in the repair and manufacture of mechanical wear-resistant parts in many industries. Background technique [0002] Wear and tear is one of the main causes of mechanical failure, bringing huge energy and material consumption to industry. In the development of modern industry and technology, mechanical equipment and its parts face increasingly harsh impact and wear environments in use, and the requirements for impact and wear resistance of materials are getting higher and higher. [0003] The wear resistance of the surfacing alloy under the action of a certain impact force depends on many factors, mainly on the matching of the base structure and the hard phase. In order to cope with the complex wear environment of impact wear, the surfacing m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/24B23K9/04
Inventor 贺定勇蒋建敏王文标周正王智慧李晓延崔丽
Owner BEIJING UNIV OF TECH
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