V-Ti-N微合金钢动态断裂韧性及韧-脆转变的分析  

DYNAMIC FRACTURE TOUGHNESS AND CHARACTERISTIC DUCTILE-BRITTLE TRANSITION OF V-Ti-N MICROALLOYED STEEL

作　　者：唐国翌[1] 蔡其巩[1] 朱静[1] 郑炀曾[2] 

机构地区：[1]钢铁研究总院 [2]燕山大学

出　　处：《钢铁》1992年第8期61-65,44,共6页Iron and Steel

基　　金：国家自然科学基金(专题号:86050277)

摘　　要：本文采用三点弯曲和示波冲击法分别测定了V—Ti—N钢在不同加载速率下的动态断裂韧性(K_(1d))及其韧-脆转变特性。结果表明,V—Ti—N钢动态断裂韧性具有明显的温度转折特征,其韧-脆转变温度T_(OB)对应变速率十分敏感,并与试验过程中缺口的尖锐程度密切相关。Dynamic fracture toughness K^(1d) and characteristic of ductile-brittle transition of the V-Ti-N mieroalloyed steel were determined by three pcints tending and instrumented impact test. It is shown that the Dynamic fracture toughness of the V-Ti-N steel has sharp temperature transition. Its ductile-brittle transition temperature T_(DB) was very sensitive to strain rate and related to the notch acuity.

关 键 词：微合金化钢 断裂韧性 韧-脆转变 

分 类 号：TG142.12[一般工业技术—材料科学与工程]