摘要 The microstructure, hardness, and residual stress of 0.28C–0.22Ti wear-resistant steel produced with cooling rates varying from 80.0 to 0.3 C/s were determined using a dilatometer, scanning electron microscope, Vickers hardness tester, and nanoindentation tester. The results showed that the hardness of martensite decreased at a rate of approximately 0.935 HV/s with carbon diffusion time (the cooldown time required to transition from Ar3, 635–100 C). The range of the residual stress caused by the hard particles decreased with decreasing cooling rate, from - 400–300 MPa (cooling rate 40 C/s) to - 200–100 MPa (cooling rate 0.5 C/s), proving that the TiC particles significantly contributed to the residual stress in the high-titanium steels.
Abstract：The microstructure, hardness, and residual stress of 0.28C–0.22Ti wear-resistant steel produced with cooling rates varying from 80.0 to 0.3 C/s were determined using a dilatometer, scanning electron microscope, Vickers hardness tester, and nanoindentation tester. The results showed that the hardness of martensite decreased at a rate of approximately 0.935 HV/s with carbon diffusion time (the cooldown time required to transition from Ar3, 635–100 C). The range of the residual stress caused by the hard particles decreased with decreasing cooling rate, from - 400–300 MPa (cooling rate 40 C/s) to - 200–100 MPa (cooling rate 0.5 C/s), proving that the TiC particles significantly contributed to the residual stress in the high-titanium steels.
Chen Dong,Hui-bin Wu,Xi-tao Wang. Effect of cooling rate on microstructure, hardness, and residual stress of 0.28C–0.22Ti wear-resistant steel[J]. Journal of Iron and Steel Research International, 2019, 26(8): 866-874.
2019, Vol. 26 
