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将25Cr5MoA钢/微合金钢/Q235钢板复合板坯加热到轧制温度950～1100℃,经保温后轧制1道次,压下量为50%～65%,制成25Cr5MoA钢/微合金钢/Q235钢热轧复合板试样.利用剪切实验方法测定了复合板材的界面结合强度,通过光学显微镜观察结合界面的组织.结果表明:当轧制温度为1000～1100℃时,25Cr5MoA钢/微合金钢/Q235钢能有效复合;压下量对25Cr5MoA钢/Q235钢复合板界面结合强度有一定的影响,当压下量达到一定程度后,随着压下量的增加,复合板的结合强度逐渐降低;轧制温度对25Cr5MoA钢/微合金钢/Q235钢复合板界面结合强度影响很大,在道次压下量一定的情况下,随着轧制温度的升高,复合板的结合强度逐渐升高.在1100℃的轧制温度和50%压下量的轧制条件下结合强度达到最大值.
25Cr5MoA steel / microalloyed steel / Q235 steel composite slab heated to a rolling temperature of 950 ~ 1100 ℃, after rolling 1 pass, the reduction of 50% to 65%, made of 25Cr5MoA steel / microalloyed steel / Q235 steel hot-rolled composite plate samples.The interfacial bonding strength of the composite plate was measured by shear test and the microstructure of the bonded interface was observed by light microscopy.The results show that when the rolling temperature is 1000-1100 ℃, the 25Cr5MoA steel / Micro-alloyed steel / Q235 steel can be effectively compounded; the reduction of the amount of 25Cr5MoA steel / Q235 steel composite panel interface bonding strength has a certain impact, when the reduction reaches a certain level, with the reduction of the increase in the combination of composite board The strength gradually decreases; the rolling temperature has a great influence on the bonding strength of 25Cr5MoA steel / microalloyed steel / Q235 steel composite board interface. With the reduction of pass weight, with the increase of rolling temperature, The strength is gradually increased, and the bonding strength reaches the maximum under the rolling temperature of 1100 ° C and the rolling condition of 50% reduction.