热激活条件下的变形诱导渗碳体溶解  

Deformation-induced cementite dissolution under thermal activation

作　　者：林一坚[1] 

机构地区：[1]上海开放大学,上海200080

出　　处：《宝钢技术》2014年第1期5-13,共9页Baosteel Technology

摘　　要：在综述文献报道的基础上,讨论了强变形珠光体钢的退火行为及珠光体钢的热加工行为,展现了热激活条件下变形诱导渗碳体溶解更为清晰的物理图像,并探讨了变形诱导渗碳体溶解现象在实际应用中的重要性。变形诱导渗碳体溶解所引起的固溶强化效应可使变形珠光体钢的强度得到进一步提高,并可保持到200℃及更高的温度;在热加工条件下,变形诱导渗碳体溶解与铁基体动态回复相互作用,可把珠光体钢改变为亚微米或纳米尺度的超细α/θ复相组织,这对于开发高强高韧(包括超塑性)的新型钢材具有重要实用价值。Abstract： Based on literature review, the annealing behavior of severely deformed pearlitic steel and the hot-deformation behavior of pearlitic steel are discussed, and a clearer physical picture of deformation-induced cementite dissolution under thermal activation is presented. The practical importance of the phenomena of deformation-induced cementite dissolution is also discussed. Solution strengthening caused by deformation-induced cementite dissolution can lead to a further increase in the strength of the deformed pearlitic steel, and the high strength can be retained up to 200 ℃ or even higher temperature. Under the condition of hot working, due to interaction between the deformation-induced eementite dissolution and dynamic recovery of Fe matrix, the pearlitic steel can be transformed into a submiero or nano scale ultra-fine duplex α/θ structure, which is of great practical significance for developing a new steel with both high strength and high toughness （or superplasticity）.

关 键 词：变形珠光体钢 渗碳体溶解 热激活 强塑性变形 

分 类 号：TG142.21[一般工业技术—材料科学与工程]