运用仪器化冲击试验评价低合金高强钢的冲击性能
Evaluation of Impact Property for Low-Alloy High-Strength Steels by Using Instrumented Impact Test
摘 要
基于仪器化冲击试验所记录的冲击载荷-位移曲线，定量分析了含钛铌镍低合金高强钢在-70℃冲击断裂瞬时的能量分布特征。结果表明：冲击吸收能量可以分为止裂能量及裂纹扩展能量两部分；910℃正火保温时间对该低合金高强钢的止裂能量影响较小，而对其裂纹扩展能量的影响显著。同时，通过显微分析手段分析了该低合金高强钢强韧化性能的微观机理。
低合金高强钢
正火
保温时间
冲击吸收能量
止裂能量
裂纹扩展能量
instrumented impact test
low-alloy high-strength steel
normalization
holding time
impact absorbed energy
crack arrest energy
crack propagation energy
Abstract
Based on the impact load-displacement curves recorded by instrumented impact tests, the energy distribution characteristics of low-alloy high-strength steels containing Nb, Ni and Ti in the instant of impact fracture at -70℃ were quantitatively analyzed. The results show that:The impact absorbed energy could be divided into two parts of crack arrest energy and crack propagation energy; the holding time of normalization process at 910℃ had little influence on the crack arrest energy of the low-alloy high-strength steels, and had remarkable influence on the crack propagation energy. In addition, the microstructure of the low-alloy high-strength steels was analyzed to ascertain the strength mechanism and toughness mechanism of low-alloy high-strength steels.
中图分类号 TG115.2 O346.1 DOI 10.11973/lhjy-wl201711008
所属栏目 试验技术与方法
基金项目
收稿日期 2017/1/16
修改稿日期
网络出版日期
作者单位点击查看
备注来张翼(1981-),男,工程师,学士,主要从事冷轧工艺、检化验设备及实验室建设等的研究,laizhangyi@baosteel.com
引用该论文: LAI Zhangyi,ZHANG Jianwei. Evaluation of Impact Property for Low-Alloy High-Strength Steels by Using Instrumented Impact Test[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2017, 53(11): 802～805
来张翼,张建伟. 运用仪器化冲击试验评价低合金高强钢的冲击性能[J]. 理化检验－物理分册, 2017, 53(11): 802～805
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参考文献
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【2】方健.单试样动态断裂性能评价方法与力值分析技术[J].理化检验-物理分册,2005,41(8):397-401.
【3】方健.运用仪器化冲击开展材料动静态加载性能联合评测[J].理化检验-物理分册,2005,41(9):451-455.
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