Improving Plasticity of Ferritic Stainless Steel Welded Joints via Laser Spot Control

被引：1

作者：

Gu, Lidong ^{[1
]}

Tang, Qi ^{[1
]}

Li, Yanqing ^{[1
]}

Liu, Fengde ^{[1
]}

Liu, Piyao ^{[1
]}

机构：

[1] Changchun Univ Sci & Technol, Sch Mech & Elect Engn, Changchun 130022, Peoples R China

来源：

MICROMACHINES | 2023年 / 14卷 / 11期

关键词：

ferritic stainless steel; welded joint; microstructure; plasticity; laser spot control; MECHANICAL-PROPERTIES; WELDING PARAMETERS; BUTT-JOINT; A-TIG; BEHAVIOR; MICROSTRUCTURE;

D O I：

10.3390/mi14112072

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The plasticity of welded 441 ferritic stainless steel joints was controlled by varying the laser beam spot diameter during laser welding. A stainless steel plate thickness of 1.2 mm was used. The microstructures of the welded joints were analyzed for various spot diameters. The elongation of breaks and the reduced area of tensile specimens were analyzed to study the effects of spot diameter on plasticity of the welded joints. The results showed that the weld melt width and weld column crystal size increased with the spot diameter, but isometric crystals in the center of the weld were gradually reduced. Increasing spot diameter resulted in decreased tensile strength, elongation after breaks, and area reduction. So the parameter must be controlled during the laser welding.

引用

页数：15

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