Application Field

Friction Stir Welding

Field Introduction

Friction stir welding refers to the use of heat generated by the friction between the high-speed rotating welding tool and the workpiece to locally melt the material to be welded. As the welding tool moves forward along the welding interface, the plasticized material flows from the front to the rear of the tool under the action of rotational friction, forming a dense solid phase weld. During the welding process, the stirring needle extends into the seam of the workpiece as it rotates. The frictional heat between the rotating stirring head (mainly the shaft shoulder) and the workpiece causes strong plastic deformation of the material in front. As the welding head moves, plastically deformed material is gradually deposited on the back of the stirring head, forming a stir weld seam.

The quality of the stir head is crucial to the effectiveness of the welding. Tungsten-rhenium alloy has excellent high-temperature properties such as a high melting point, good strength and hardness, and high recrystallization temperature, making it excellent for the welding of special alloys.






■    Domestically leading refractory metal machining production line.

■    Patents for tungsten-rhenium alloy, rhenium plate preparation and other related inventions.

■    One of the earliest companies in China to engage in the research of refractory materials, with more than 60 years experience in R&D and preparation.