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Welding powder

A welding powder and post-welding technology, which is applied in the field of low hardness solder powder

Active Publication Date: 2014-07-16
四川有色金源粉冶材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hardness of the welding layer is generally 220-250HB, and the hardness is too high when the casting is repaired and processed.

Method used

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  • Welding powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Use an electronic scale (sensitivity 1g) to weigh 1.5kg of FeB containing B20%, Si0.9Kg containing Si≥99%, Cu5Kg containing Cu≥99.5%, Co0.2Kg containing Co≥99%, and Ni≥99 % Ni42.4Kg will be smelted in a 50Kg intermediate frequency furnace, heated and melted, and the alloy obtained by chemical analysis contains B0.6%, Fe3.3%, Cu10%, Si1.8%, Co0.4% , the balance being Ni and other impurities not exceeding 0.1%. The atomization temperature measured by a thermometer is 1400 degrees, the gas pressure is 1.2 MPa, the hardness of the welding layer after spray welding is 180HB, and the tensile strength is 25.9KN.

Embodiment 2

[0014] Use an electronic scale (sensitivity 1g) to weigh 1.25kg of FeB containing B20%, Si0.75Kg containing Si≥99%, Cu4Kg containing Cu≥99.5%, 0.1Kg containing Co≥99%, and Ni≥99 % Ni43.9Kg will be smelted in a 50Kg intermediate frequency furnace, heated and melted, and the alloy obtained by chemical analysis contains B0.5%, Fe3.0%, Cu8%, Si1.5%, Co0.2%, The balance is Ni and other impurities not exceeding 0.1%. The temperature of atomization measured by a thermometer is 1410 degrees, the gas pressure is 1.2 MPa, the hardness of the welding layer after spray welding is 160HB, and the tensile strength is 25.2KN.

Embodiment 3

[0016] Use an electronic scale (sensitivity 1g) to weigh 1.5kg of FeB containing B20%, Si0.75Kg containing Si≥99%, Cu5Kg containing Cu≥99.5%, Co0.1Kg containing Co≥99%, and Ni≥99 % Ni42.65Kg will be smelted in a 50Kg intermediate frequency furnace, heated and melted, and the alloy obtained by chemical analysis contains B0.6%, Fe3.4%, Cu10%, Si1.5%, Co0.2% , the balance being Ni and other impurities not exceeding 0.1%. The atomization temperature measured by a thermometer is 1420 degrees, the gas pressure is 1.2 MPa, the hardness of the welding layer after spray welding is 175HB, and the tensile strength is 25.8KN.

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Abstract

The invention discloses a solder powder. The alloy composition of the solder powder is: B: 0.5-1%, Si: 1.5-2%, Fe: 3-7%, Cu: 8-12%, Co: 0.1-1%, no more than 0.1% impurity, the balance is Ni. Its production process includes preparing raw materials, preparing raw materials in proportion, smelting, atomizing, cooling, drying, sieving, welding and testing, packaging, warehousing, etc. It is also possible to adjust the raw material preparation based on the feedback results of the detection of the welding layer. Using the welding powder of the invention, the hardness of the welding layer is as low as <200HB, and the hardness is equivalent to that of castings, so it is widely used in repairing various castings.

Description

technical field [0001] The invention relates to the welding field, in particular to a low-hardness solder powder. Background technique [0002] In the foundry industry, casting defects (porosity, trachoma, cracks, pits, etc. on the surface or inside of the casting) cannot be completely avoided. Conventional repairs include: welding rods, foundry glue, spray welding, etc. After electrode welding, the hardness of the solder joint is too high, there is stress inside, and cracks are prone to occur. Generally, annealing heat treatment is required to meet the processing requirements. And due to the limitation of welding conditions, it is easy to produce secondary defects such as pores and slag inclusions inside; foundry glue repairs rough castings, and the bonding strength and hardness are very low; spray welding has the advantages of simple equipment, less investment, quick results, convenient operation, easy to master, coating The layer quality is stable, the machining performa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30
Inventor 周森周定杨蔡俊峰
Owner 四川有色金源粉冶材料有限公司