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Self-protective flux-cored wire for 51CrV4 spring steel and preparation method thereof

A flux-cored welding wire, 51crv4 technology, applied in welding equipment, welding medium, manufacturing tools, etc., can solve the problems of scarcity, failure, poor impact toughness, etc., and achieve the effect of convenient operation, strong applicability, and less welding spatter

Inactive Publication Date: 2018-08-28
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are few matching welding consumables for 51CrV4 spring steel on the market, and their impact toughness is poor, which often leads to their failure in engineering applications.
In addition, there are only a few reports on the welding process of 51CrV4 spring steel welding, and no reports on its fusion welding self-shielded flux cored wire

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The preparation method of self-protected flux-cored welding wire for 51CrV4 spring steel is specifically implemented according to the following steps:

[0048] Step 1. Weigh 12% manganese powder, 8% chromium powder, 4% vanadium powder, silicon powder: 1%, barium fluoride 32%, marble 10%, aluminum-magnesium alloy 10%, and rutile 13% respectively. Quartz sand 10%, the total mass percentage of the above components is 100%;

[0049] Step 2. Mix the barium fluoride, marble, aluminum-magnesium alloy, and quartz sand weighed in step 1 to obtain mixed powder A, add water glass binder to mixed powder A and mix uniformly, and mix powder A and water glass to bond The mass ratio of the agent is 5:1, then it is placed in a heating furnace for sintering, crushed and sieved to obtain mixed powder B. The sintering temperature is 750℃, the sintering time is 5.5h, and the sieving particle size is 60-140 mesh. ;

[0050] Step 3: Mix the manganese powder, chromium powder, vanadium powder, silic...

Embodiment 2

[0056] The preparation method of self-protected flux-cored welding wire for 51CrV4 spring steel is specifically implemented according to the following steps:

[0057] Step 1. Weigh 12% manganese powder, 6% chromium powder, 3.5% vanadium powder, 1.5% silicon powder, 29% barium fluoride, 9% marble, 11% aluminum-magnesium alloy, 13% rutile, and quartz according to mass percentages. 15% sand, the total mass percentage of the above components is 100%;

[0058] Step 2. Mix the barium fluoride, marble, aluminum-magnesium alloy, and quartz sand weighed in step 1 to obtain mixed powder A, add water glass binder to mixed powder A and mix uniformly, and mix powder A and water glass to bond The mass ratio of the agent is 5:1, and then it is placed in a heating furnace for sintering, crushed and sieved to obtain mixed powder B. The sintering temperature is 650°C, the sintering time is 4h, and the sieving particle size is 60-140 mesh;

[0059] Step 3: Mix the manganese powder, chromium powder, va...

Embodiment 3

[0065] The preparation method of self-protected flux-cored welding wire for 51CrV4 spring steel is specifically implemented according to the following steps:

[0066] Step 1. Weigh 11% manganese powder, 10% chromium powder, 5% vanadium powder, silicon powder 2%, barium fluoride 28%, marble 10%, aluminum-magnesium alloy 6%, rutile 13%, quartz 15% sand, the total mass percentage of the above components is 100%;

[0067] Step 2. Mix the barium fluoride, marble, aluminum-magnesium alloy, and quartz sand weighed in step 1 to obtain mixed powder A, add water glass binder to mixed powder A and mix uniformly, and mix powder A and water glass to bond The mass ratio of the agent is 5:1, then it is placed in a heating furnace for sintering, crushed and sieved to obtain mixed powder B, wherein the sintering temperature is 670℃, the sintering time is 6h, and the sieving particle size is 60-140 mesh;

[0068] Step 3: Mix the manganese powder, chromium powder, vanadium powder, silicon powder, and ...

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Abstract

The invention discloses a self-protective flux-cored wire for 51CrV4 spring steel. The self-protective flux-cored wire for 51CrV4 spring steel comprises a flux core and a welding scale, wherein the flux core is prepared from the following components in percentages by mass: 8-12% of manganese powder, 6-10% of chromium powder, 2-5% of vanadium powder, 1-2% of silicon powder, 28-33% of barium fluoride, 7-10% of marbles, 6-11% of an aluminum-magnesium alloy, 10-13% of rutile and 10-15% of quartz sand, totaling 100%. The self-protective flux-cored wire for 51CrV4 spring steel has the advantages ofbeing little in welding spatter, attractive in appearance of weld and good in welding process performance, can be used for a continuous feeding automatic welding machine and has the effects of savingprotecting gas and being relatively high in production efficiency; slag and protective gas are generated by a mineral slag system, so that a bath formed during welding is protected, thereby playing aself-protecting role. The preparation method of the self-protective flux-cored wire for 51CrV4 spring steel is simple, convenient to operate and high in applicability, and can be used for batch production.

Description

Technical field [0001] The invention belongs to the technical field of welding materials and preparation methods thereof, and specifically relates to a self-protected flux-cored welding wire for 51CrV4 spring steel. The invention also relates to a preparation method of the flux-cored welding wire. Background technique [0002] Spring steel is an important type of construction steel material, and its application fields are very wide, including infrastructure such as trains and automobiles. Since my country's railway vehicles put forward the requirements of "speed increase, heavy load, and safety", in the past few years, my country has expanded its railway lines by 20,000 kilometers, of which 13,000 kilometers have a design speed of 350 kilometers per hour. The automobile industry is also the main body of the spring steel downstream industry, and the amount of spring rod products needed to manufacture automobiles every year is about 60% of the total. [0003] 51CrV4 spring steel is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/3073B23K35/40
Inventor 张敏许桓瑞慕二龙王晓伟李静李洁贾芳黄超
Owner XIAN UNIV OF TECH