拉拔珠光体钢时效过程的内耗研究  

INTERNAL FRICTION STUDY ON THE AGING PROCESS OF DRAWN PEARLITE STEEL

作　　者：闵娜[1] 李伟[1] 金学军[1] 

机构地区：[1]上海交通大学材料科学与程学院,上海200030

出　　处：《物理学进展》2006年第3期415-418,共4页Progress In Physics

基　　金：国家自然科学基金;钢铁联合研究基金资助(NO.50371057)

摘　　要：由于珠光体钢大变形过程中存在渗碳体分解现象,分解的碳原子偏聚于位错芯处,且部分固溶于铁素体,时效过程中渗碳体析出。通过内耗对473 K时效的拉拔珠光体钢研究表明,随着保温时间增加,Snoek峰驰豫强度先增后降,而SK峰驰豫强度不断降低,且峰宽变窄。由该结果可知由于大量碳原子存在于位错处,随着保温时间增加,分解后的碳原子先部分扩散溶入铁素体,随后以碳化物形式析出于位错处。时效过程中碳原子的三种分配方式有效的提高了拉拔珠光体钢的力学性能。The study on the aging of the drawn pearlite steel by internal friction measurment at 473K shows that the relaxation strength of the snoek peak increases firstly and then decreases within the increment of aging time, while the relaxation strength of the SK peak decreases all the time and the width of the peak decreases too. This result reveals that the three distribution ways of carbon atoms in the aging process enhance the mechanical properties of drawn pearlite steel significantly.

关 键 词：拉拔 珠光体钢 内耗 SK峰 Snoek峰 时效 

分 类 号：TG111.7[金属学及工艺—物理冶金]