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采用Gleeble-1500热模拟试验机在不同的峰值温度条件下对2.25Cr1Mo0.25V钢焊接热影响区组织与性能进行模拟研究。通过金相及断口分析,研究与讨论了热循环峰值温度对2.25Cr1Mo0.25V钢组织与性能的影响。试验结果表明,峰值温度为1200℃时组织粗大、韧性差。峰值温度为1000℃时晶粒细小、组织分布均匀且韧性最好。峰值温度分别为750与620℃时的组织与未循环材料相近,韧性较好。
Using Gleeble-1500 thermal simulation test machine under different peak temperature conditions 2.25Cr1Mo0.25V steel welding heat-affected zone organization and performance simulation. Through metallographic analysis and fracture analysis, the influence of the peak temperature of the thermal cycle on the microstructure and properties of 2.25Cr1Mo0.25V steel was studied and discussed. The experimental results show that the microstructure is coarse and the toughness is poor when the peak temperature is 1200 ℃. When the peak temperature is 1000 ℃, the grains are fine, the structure is evenly distributed and the toughness is the best. The peak temperature of 750 and 620 ℃, respectively, when the organization and non-recycled material similar, good toughness.