Zhang Xianzhong, Zhou Guifeng, Chen Qingfeng, Xiong Yuzhang, Cai Qizhou. Effect of Cooling Process on Microstructure and Mechanical Properties of High Strength Fracture Splitting Connecting Rod in Auto Engine[J]. IRON STEEL VANADIUM TITANIUM, 2010, 31(1): 51-55,61.
Citation:
Zhang Xianzhong, Zhou Guifeng, Chen Qingfeng, Xiong Yuzhang, Cai Qizhou. Effect of Cooling Process on Microstructure and Mechanical Properties of High Strength Fracture Splitting Connecting Rod in Auto Engine[J]. IRON STEEL VANADIUM TITANIUM, 2010, 31(1): 51-55,61.
Zhang Xianzhong, Zhou Guifeng, Chen Qingfeng, Xiong Yuzhang, Cai Qizhou. Effect of Cooling Process on Microstructure and Mechanical Properties of High Strength Fracture Splitting Connecting Rod in Auto Engine[J]. IRON STEEL VANADIUM TITANIUM, 2010, 31(1): 51-55,61.
Citation:
Zhang Xianzhong, Zhou Guifeng, Chen Qingfeng, Xiong Yuzhang, Cai Qizhou. Effect of Cooling Process on Microstructure and Mechanical Properties of High Strength Fracture Splitting Connecting Rod in Auto Engine[J]. IRON STEEL VANADIUM TITANIUM, 2010, 31(1): 51-55,61.
The effect of cooling process on microstructure and mechanical properties of high strength microalloyed medium-carbon steel fracture splitting connecting rod in auto engine was studied using the method of microscope, SEM and TEM, etc.The results show that high cooling rate after finished rolling can increase the percentage of pearlite, decrease the grain size of ferrite and lessen interlamellar spacing of pearlite.The precipitation phases in the steel are composite phase of (V, Ti) (C, N) with variants of the B-N orientation relationship to the ferrite.Their granularity are about 30~170 nm, and they will decrease with the speeding up cooling.The yield strength is improved with increasing the cooling rate after finished rolling, and in case of high cooling rate, the yield strength can reach to 770 MPa, with the contributing of the precipitation strengthening to yield strength being 174 MPa.
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