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Fluxing agent for bi-metal sintering and preparation method thereof

A technology of flux and bimetal, which is applied in the field of flux and its preparation for bimetal sintering, can solve problems such as inclusions, cladding peeling, affecting product bonding strength and wear resistance, etc., and achieves simple operation and reasonable process flow Effect

Pending Publication Date: 2015-11-18
SHANDONG CHANGLIN MACHINERY GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current flux in my country cannot meet the quality requirements of the bimetallic sintered joint surface and coating. After sintering, the product quality fluctuates greatly, and sometimes the coating peels off and peels off. Metallographic analysis shows that inclusions and cracks appear on the joint surface after sintering. Various defects such as pores, pores, and wear-resistant phase segregation of the coating affect the bonding strength and wear resistance of the product

Method used

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  • Fluxing agent for bi-metal sintering and preparation method thereof
  • Fluxing agent for bi-metal sintering and preparation method thereof
  • Fluxing agent for bi-metal sintering and preparation method thereof

Examples

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Effect test

Embodiment 1

[0028] The flux used for bimetallic sintering is characterized in that it comprises the following raw materials in parts by weight: 30 parts of rosin powder; 15 parts of sulfur powder; 30 parts of borax; 25 parts of glycerin 。

[0029] The preparation method of the flux for bimetallic sintering comprises the following steps:

[0030] a. Complete dehydration of borax: first pour borax with an analytical purity of 99.5% into the crucible; then put the crucible into the BTF-1000 tempering furnace, turn on the power and heat up to 500-600°C, and keep it warm; the holding time is 3-5h, Keep warm for 3-5 hours, then cut off the power, and cool the melted borax to 50-70°C with the furnace, then take it out of the furnace and air-cool;

[0031] B. Borax pulverization: use the CF-630 laboratory small-scale jet pulverizer to pulverize the borax after step a dehydration to 200 mesh, then use the 200 mesh standard sampling sieve to screen the pulverized borax;

[0032] c. Sulfur and ros...

Embodiment 2

[0038] The flux used for bimetallic sintering is characterized in that it comprises the following raw materials in parts by weight: 25 parts of rosin powder; 15 parts of sulfur powder; 35 parts of borax; 25 parts of glycerin 。

[0039] The preparation method of the flux for bimetallic sintering comprises the following steps:

[0040] a. Complete dehydration of borax: first pour borax with an analytical purity of 99.5% into the crucible; then put the crucible into the BTF-1000 tempering furnace, turn on the power and heat up to 500-600°C, and keep it warm; the holding time is 6-8h, After keeping warm for 6-8 hours, turn off the power, and cool the melted borax to 50-70°C with the furnace, then take it out of the furnace and air-cool;

[0041] B. Borax pulverization: use the CF-630 laboratory small-scale jet pulverizer to pulverize the borax after step a dehydration to 200 mesh, then use the 200 mesh standard sampling sieve to screen the pulverized borax;

[0042] c. Sulfur an...

Embodiment 3

[0048] The flux used for bimetallic sintering is characterized in that it comprises the following raw materials in parts by weight: 28 parts of rosin powder; 15 parts of sulfur powder; 32 parts of borax; 25 parts of glycerin 。

[0049] The preparation method of the flux for bimetallic sintering comprises the following steps:

[0050] a. Complete dehydration of borax: first pour borax with an analytical purity of 99.5% into the crucible; then put the crucible into the BTF-1000 tempering furnace, turn on the power and heat up to 500-600°C, and keep it warm; the holding time is 3.5-6h, After keeping warm for 3.5-6 hours, turn off the power, and cool the melted borax to 50-70°C with the furnace, then take it out of the furnace and air-cool;

[0051]B. Borax is pulverized: use the CF-630 laboratory small-sized jet pulverizer to pulverize the borax after step a dehydration to 200 mesh, then use the 200 mesh standard sampling sieve to screen the pulverized borax;

[0052] c. Sulfur...

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Abstract

The invention belongs to the technical field of bi-metal sintering, and particularly relates to a fluxing agent for the bi-metal sintering and a preparation method thereof. The fluxing agent for the bi-metal sintering comprises, by weight, 25-30 parts of colophony powder, 15-20 parts of sulphur powder, 30-35 parts of borax and 25-30 parts of glycerin. By means of the fluxing agent for the bi-metal sintering, the fluxing agent problem of the bi-metal sintering is fundamentally solved, the raw materials are easy to control, and the stability of a bi-metal sintering product is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of bimetal sintering, and in particular relates to a flux used for bimetal sintering and a preparation method thereof. Background technique [0002] Bimetal sintering is an important link to solve the life of hydraulic pumps and hydraulic motors. The stability and improvement of sintering quality is a major problem in the industry, especially the sintering of ductile iron and copper alloy materials is the core technology of the enterprise, and the key material is flux; The flux can make the bimetallic sintering proceed at a lower temperature, which can not only ensure the strength of the bimetallic sintered joint surface, but also ensure that the properties of the base material are not affected. However, the current flux in my country cannot meet the quality requirements of the bimetallic sintered joint surface and coating. After sintering, the product quality fluctuates greatly, and sometimes the coating pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/04C22C1/06
Inventor 英霄刘彦朝张桂忠刘军耿伟许跃雷
Owner SHANDONG CHANGLIN MACHINERY GRP
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