Chinese Journal of Lasers, Volume. 35, Issue 11, 1830(2008)
Research on Microstructure and Properties of 2Cr13 Stainless Steel Parts Made by Laser Direct Metal Deposition
Direct forming 2Cr13 parts were studied experimentally for explaining the performance of laser direct metal deposition (DMD) forming. The microstructure of single track cladding, multiple tracks overlapping cladding, and multi-layer deposition were observed. The mechanical properties of specimens, such as hardness, anti-abrasive, tensile and residual stress distribution, were tested. The experimental results showed that the typical patterns of single track had cellular dendritic, column dendritic, and equiaxed crystals. The patterns depended on the temperature gradient and the solidification rate of cladding. The overlapping zone of DMD specimen was different from that of powder preset cladding. The grains of multi-layer deposition specimen showed the characteristic of orientated growth which was influenced greatly by scanning path. Under different technological parameters, the average hardnesses of specimens changed from 300 HV0.2 to 550HV0.2. When the microstructure was thin dendritic crystal, the anti-abrasive property increased one time than that of 2Cr13 substrate which was quenched and tempered. The average tensile strength increased by 30%. The residual stresses were different at different positions, but all of them were small.
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Zhang Wei, Yao Jianhua, Peng Wei, Dong Chenhui, Tang Xiaodan. Research on Microstructure and Properties of 2Cr13 Stainless Steel Parts Made by Laser Direct Metal Deposition[J]. Chinese Journal of Lasers, 2008, 35(11): 1830