14Cr1MoR钢珠光体球化研究

Study on pearlite spherodization of 14Cr1MoR steel

采用加速试验模拟14Cr1MoR钢的珠光体球化过程,对不同球化程度后试样进行力学性能研究。实验结果表明,在高温时效过程中14Cr1Mo钢中的珠光体组织逐渐分解,转变成球状碳化物在晶界处聚集。珠光体球化使钢的高温强度降低,尤其是高温屈服强度降低显著。球化程度愈严重,钢的高温强度愈低。

High-temperature accelerated test was employed to simulate the evolution process of pearlite spheroidization of 14 CrMoR steel, and mechanical properties of 14CrMoR steel with different spheriodized degree were tested. The results show that during the high temperature aging process, the pearlite structure in 14Cr1Mo steel gradually decomposes and transforms into spherical carbides to aggregate at the grain boundary. Pearlite spheroidization reduces the high temperature strength of the steel, especially the high temperature yield strength. The more severe of spheroidization degree, result in lower high temperature strength of the steel.