High-strength steel differential stable austenitic friction stir welding method and welding joint

A friction stir and welding method technology, applied in the field of metal plastic processing, can solve the problems of large welding torque and forward resistance, large plastic deformation and heat input, difficult to meet application requirements, etc., so as to reduce the time cost and reduce the heat affected zone. , The effect of improving the utilization rate of welding efficiency
CN113798656AActive Publication Date: 2021-12-17XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
Publication Date
2021-12-17

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Abstract

The invention discloses a high-strength steel differential stable austenitic friction stir welding method and a welding joint. The method comprises the following steps of carrying out first-time heat preservation on high-strength steel, welding the high-strength steel by adopting a differential friction stir welding technology, carrying out second-time heat preservation, and then cooling to room temperature, wherein according to differential friction stir welding, rotating friction stir welding is conducted on the high-strength steel through different shaft shoulders and stirring needles which rotate independently in the same direction or in the opposite directions. Compared with a conventional friction stir welding technology, the differential friction stir welding technology can improve the uniformity of a joint structure, increase the content of retained austenite and improve the mechanical property of the welding joint.
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Description

technical field

[0001] The invention belongs to the field of metal plastic processing, and in particular relates to a high-strength steel differential stability Austrian friction stir welding method and a welded joint. Background technique

[0002] The automobile industry is the pillar industry of the developed countries such as Europe, America, Japan and South Korea and the national economy of our country. With the rapid development of the automobile industry, the problems of environmental pollution and energy shortage have become increasingly prominent. Reducing fuel consumption and tail gas emissions has become an urgent problem to be solved in the automotive industry. In order to realize the lightweight of automobiles, it has become a development trend to replace traditional low-strength steels with advanced high-strength steels. As a representative of the third generation of advanced high-strength steel, transformation-induced plasticity (Transformation-induced plasti...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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