Wei Xu, Xiaoguang Wang, Zhengxing Men. Microstructure and Mechanical Properties of 300M Laser Welded Joints of Ultra-High Strength Steel[J]. Laser & Optoelectronics Progress, 2020, 57(15): 151407
- Laser & Optoelectronics Progress
- Vol. 57, Issue 15, 151407 (2020)
Fig. 1. Equilibrium solidification path of 300M steel
Fig. 2. Microstructure of laser welded joint of 300M steel.(a)Welded joint; (b) weld metal[1 in Fig. 2 (a)]; (c) HAZ[2 in Fig. 2 (a)]; (d) HAZ1[3 in Fig. 2 (a)]; (e) base material[4 in Fig. 2 (a)]
Fig. 3. Hardness distribution of 300M steel laser welded joints
Fig. 4. Stress-strain curves of 300M steel laser welded joints
Fig. 5. Fracture morphology of 300M steel welded joint. (a) Substrate; (b) welded joint; (c) welded joint+heat
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Table 1. Chemical composition of 300M ultra high strength steel
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