Ultrasonic Analysis of Cracking Propagation Morphology in the Fusion Zone of High Strength Steel

材料科学技术（英文）, 2002, 18(1): 21-23.

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1.Key Laboratory of Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University, Jinan 250061, China

2.Key Laboratory of Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University, Jinan 250061, China

3.Key Laboratory of Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University, Jinan 250061, China

4.Key Laboratory of Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University, Jinan 250061, China

5.Key Laboratory of Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University, Jinan 250061, China

基金项目: This work was supported by the visiting scholar foundation(05170104) Key Laboratory of Liquid Structure and Heredity of Materials, Ministry of Education, China

Ultrasonic Analysis of Cracking Propagation Morphology in the Fusion Zone of High Strength Steel

Keywords： High strength steel

Cracking morphology in the fusion zone of HQ130 high strength steel was researched by "the y-slit test" and "three-point bend test", ultrasonic test and microscope. HQ130 and Q J63 high strength steel was welded by Ar+CO2 gasshielded arc welding under the condition without preheating. Experimental results indicated that welding cracks wereproduced in the partially melted zone of the weld root of HQ130 steel side and propagated parallel to the fusionzone. The cracks were developed alternatively between the weld and the partially melted zone, and are not strictlyruptured at W/F (weld metal/fusion zone) boundary surface. Controlling weld heat input (E) about 16 k J/cm couldmake the cracking rate lowest and satisfy the performance requirement of welded joint zone.

参考文献

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Ultrasonic Analysis of Cracking Propagation Morphology in the Fusion Zone of High Strength Steel

参考文献