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| Effect of reduction rates on interfacial microstructure morphologies of 316L/EH40 clad plate |
| JIN He-rong1,2, HAN Min-feng3, DUAN Chang-xin3 |
1. Key Laboratory of Advanced Forging and Stamping Technology and Science of Ministry of National Education, Yanshan University, Qinhuangdao 066004, Hebei, China
2. Parallel Robot and Mechatronic System Laboratory of Hebei Province, Yanshan University, Qinhuangdao 066004, Hebei, China
3. School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China |
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Abstract In order to determine the reduction rate required for the preparation of 316L/EH40 clad plate, MSC.Marc software was applied to simulate the hot rolling process of 316L/EH40 under different reduction rates. Based on the contrastive analysis of the stress and strain fields at the interface of the deformation zone,the minimum reduction rate of effective bonding of stainless steel clad plates is 55%. Based on the analysis results,the Gleeble-3800 thermal simulation test machine was used to prepare composite samples with different reduction rates. The interface structure of the sample was observed and analyzed,and conclusions are as follow: when the deformation of the sample reaches 30%,the pores near the interface are basically closed,but some inclusions and micropores still exist;when the deformation is more than 50%,the micropores at the interface disappear completely and the number of inclusions decreases and the size decreases;the microstructure of low alloy steel side is ferrite and pearlite,the decarbonization layer is distributed near the bonding surface and with the increase of reduction rate,the thickness of decarbonizing layer decreases gradually;the side of stainless steel consists of austenite structure,the grain size of austenite is refined with the increase of reduction rate and the microhardness value increases with the increase of reduction rate.
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Received: 15 February 2019
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2019, Vol. 54 
