升温速率对穿刺线夹熔痕金相组织的影响  

The influence of heating rate on the metallographic structure of insulation piercing connectors

作　　者：赵艳红 张智斌 曹旭东 ZHAO Yan-hong;ZHANG Zhi-bin;CAO Xu-dong(China People's Police University,Hebei Langfang 065000,China;不详)

机构地区：[1]中国人民警察大学侦查学院物证鉴定中心,河北廊坊065000 [2]石嘴山市消防救援支队,宁夏石嘴山753000 [3]中国人民警察大学,河北廊坊065000

出　　处：《消防科学与技术》2021年第12期1841-1844,共4页Fire Science and Technology

基　　金：中国人民警察大学国家自然科学基金培育(预研)课题(ZKJJPY201902)。

摘　　要：通过热台金相显微镜改变升温速率,模拟火场不同升温条件下,JJC1-35型绝缘穿刺线夹接触不良熔痕受热过程中升温速率对其金相组织的影响。结果表明:金相组织的晶粒平均尺寸会随着温度升高而增大,晶粒截距会随着升温速率的升高而增大,晶粒度会随着升温速率的增大而降低;金相组织的孔洞随着受热温度升高逐渐缩小,缩小的速度随升温速率增大而加快。所得结论可以为此类火灾物证鉴定识别提供更科学的依据。The influence of heating rate on the metallographic structure of JJC1-35 insulation piercing connectors with poor contact beads under different heating conditions was simulated by changing the heating rate under the metallurgical microscope with heating stage.The results show that the average grain range of the metallographic structure will increase with the increase of temperature,the grain intercept will increase with the increase of the heating rate,and the grain size will decrease with the increase of the heating rate.The pores of the metallographic structure gradually shrink with the increase of the heating temperature,and the shrinking speed increases with the increase of the heating rate.The study provides a more scientific basis for the identification of such fire physical evidence.

关 键 词：穿刺线夹 接触不良 升温速率 金相组织 火灾调查 

分 类 号：X928.7[环境科学与工程—安全科学] D918.91[政治法律—法学]