Effects of Weathering Bridge Steel and Cooling Rate on the Interfacial Microstructure and Mechanical Properties of Stainless Steel Clad Plates
316L+Q420qENH and 316L+Q500qENH stainless steel clad plates were prepared by Gleeble-1500D to simulate the hot-rolling bonding of Q420qENH/Q500qENH weathering bridge steel and 316L stainless steel.The effects of bridge weathering steel and cooling rate on the interfacial microstructure and shear strength of stainless steel clad plates were investigated.The results showed that 316L+Q500qENH ex-hibited higher interfacial shear strength(＞420 MPa)than 316L+Q420qENH,which had thinner banded ferrite.For 316L+Q420qENH steel,when the cooling rate increased from 0.25℃/s to 1℃/s,the degree of element diffusion decreased,leading to a decrease in interfacial shear strength.Within the cooling rate range of 1～10℃/s after rolling,the content of ferrite at the interface gradually decreased and the micro-structure gradually refined.Therefore the interface shear strength of 316L+Q420qENH steel gradually im-proved and reached the highest value at 10℃/s,which was 422 MPa.In general,the reduction of ferrite content at the interface,the refinement of microstructure and the increase of element diffusion were condu-cive to improve the interfacial shear strength of the stainless steel clad plates.
NETL
NSTL
万方数据
