一种提高异质金属搅拌摩擦焊接头可焊性的方法
By employing localized pre-stirring friction processing and the addition of reinforcing phases, the problems of welding defects and reduced mechanical properties in dissimilar metal welding were solved, achieving high-quality connections in dissimilar metal welding and improving the overall performance of the components.
CN116140781BActive Publication Date: 2026-07-17CHINA WEAPON SCI ACADEMY NINGBO BRANCH
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA WEAPON SCI ACADEMY NINGBO BRANCH
- Filing Date
- 2022-11-09
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing technologies for welding dissimilar metals suffer from welding defects such as lack of fusion, porosity, and cracks. Furthermore, heat treatment of the entire sheet metal leads to a reduction in mechanical properties, affecting the safety performance of the components.
Method used
The joint microstructure is refined by local pre-stir friction processing, and a reinforcing phase is added during the pre-stir friction processing to inhibit the formation of intermetallic compounds. Then, friction stir welding is performed to avoid overall heat treatment.
Benefits of technology
It improves the weldability of dissimilar metal welding, reduces joint defects, maintains the original mechanical properties of the plates, and enhances the toughness and fluidity of the joint.
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Figure CN116140781B_ABST
Abstract
本申请提供一种提高异质金属搅拌摩擦焊接头可焊性的方法，其在避免整张板材热处理的前提下，对接头的局部进行预搅拌摩擦加工；通过搅拌针高速旋转产生的破碎作用与摩擦热作用，实现钢、钛合金等硬质金属接头组织的局部细化，既避免了整张板材组织粗化和力学性能降低，又能够提高接头在后续焊接过程中的流动性，从而提高构件的整体性能。此外，预搅拌摩擦加工过程中，通过预埋添加相进一步改善晶粒的细化程度，增大接头细晶区域，并抑制后续焊接过程中金属间化合物的生成。
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