Hard alloy brazing refers to the method of using hard alloy as a brazing material to connect two or more hard alloy parts together. Due to its high hardness, wear resistance, and corrosion resistance, hard alloys are widely used in the manufacturing of cutting tools, mining tools, and more. The selection of brazing materials is crucial in the brazing process of hard alloys. Below, we will provide a detailed introduction to commonly used hard alloy brazing materials and their characteristics.

1、 Silver based brazing material

Silver based brazing material is a commonly used hard alloy brazing material, mainly composed of silver and copper. Due to its good wettability, fluidity, and corrosion resistance, silver based brazing materials are widely used in brazing hard alloy tools. The brazing temperature of silver based brazing materials is generally lower than that of copper based brazing materials, which is beneficial for preventing brazing cracks. However, the cost of silver based brazing materials is relatively high and not suitable for large-scale production.

2、 Copper based brazing material

Copper based brazing material is a common hard alloy brazing material, mainly composed of copper and zinc. Due to its low cost, good wetting and corrosion resistance, copper based brazing materials are widely used in the manufacturing of cutting tools and mining tools. However, copper based brazing materials have low strength and hardness, making them unsuitable for applications with high strength and wear resistance.

Biate copper welding plate

For example, when 4% Mn is added to BCuS8ZnMn, the shear strength of the joint can reach 300-320MPa at room temperature when brazing hard alloys such as YG8, YTS, YTIS, etc; At 320 ℃, there is still a pressure of 220-240MPa, indicating that this brazing material has good performance in brazing hard alloys.

Application of Biate Copper Welding Plates

Copper based brazing materials are also widely used in the machining process of workpieces such as cutting teeth, especially the X-55 series brazing pads combined with flux have good effects on brazing cutting teeth.

3、 Nickel based brazing material

Nickel based brazing material is a type of hard alloy brazing material with high strength and hardness, mainly composed of nickel and chromium. Due to its good wetting and corrosion resistance, as well as excellent high-temperature performance, nickel based brazing materials are widely used in manufacturing high-strength and high wear resistant component connections. However, the cost of nickel based brazing materials is relatively high and not suitable for large-scale production.

4、 Tin based brazing material

Tin based brazing material is a common hard alloy brazing material, mainly composed of tin and lead. Due to its low melting point and good wettability, tin based brazing materials are widely used for brazing hard alloy parts. However, tin based brazing materials have low hardness and are not suitable for applications with high strength and wear resistance.

Biate copper welding rod

In summary, commonly used brazing materials for hard alloy brazing include silver based brazing materials, copper based brazing materials, nickel based brazing materials, and tin based brazing materials. Different brazing materials have different characteristics, and suitable brazing materials should be selected according to specific application scenarios. At the same time, in order to improve the connection quality and service life of hard alloy parts, the brazing process parameters should be strictly controlled to ensure a firm and reliable connection.

This article is for reference only (the above data may change with process and technological innovations), and more information about the use of brazing materials can be learned based on actual process applications.

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