主管:中华人民共和国应急管理部
主办:应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU

消防科学与技术 ›› 2021, Vol. 40 ›› Issue (12): 1841-1844.

• • 上一篇    下一篇

升温速率对穿刺线夹熔痕金相组织的影响

赵艳红, 张智斌, 曹旭东   

  1. (1.中国人民警察大学,河北 廊坊 065000;2.石嘴山市消防救援支队,宁夏 石嘴山 753000)
  • 出版日期:2021-12-15 发布日期:2021-12-15
  • 作者简介:赵艳红(1981-),女,中国人民警察大学侦查学院物证鉴定中心副主任,副教授,硕士研究生导师,主要从事火灾调查和火灾物证鉴定方面的教学和科研工作,河北省廊坊市,065000。
  • 基金资助:
    中国人民警察大学国家自然科学基金培育(预研)课题(ZKJJPY201902)

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

ZHAO Yan-hong, ZHANG Zhi-bin, CAO Xu-dong   

  1. (China People's Police University, Hebei Langfang 065000,China)
  • Online:2021-12-15 Published:2021-12-15

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。

关键词: 穿刺线夹, 接触不良, 升温速率, 金相组织, 火灾调查

Abstract: 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.