heat checking meaning in English

发情检查
热裂纹

The highlights of this paper include : hoop toughness criterion for longitudinal heat checking of tool joint was introduced firstly ; failure criterion for crescent - shaped wear casing was established according to the results of full - scale collapse tests ; new - typed alloy for hardbanding of tool joint was developed , its property has showed good performance in the tests
本文的主要创新点在于：以现场失效案例分析为基础，提出了钻杆接头纵向热裂的横向韧性判据；通过对已磨损套管的实物挤毁试验研究，确定了不均匀磨损套管的挤毁失效准则；设计出了具有独立知识产权的钻杆接头硬化带用新型耐磨减摩合金的成分，经实验室试验表明其性能可以达到或超过国外同类产品。
Especially for the longitudinal heat checking of tool joint , the hoop toughness criterion of tool joint material was put forward to prevent the heat checking . based on analysis for field failure cases , minimal hoop impact work by means of mechanical calculation has been obtained , which can be used to modify the relevant contents of api rp7g
特别针对钻杆接头纵向热裂问题，提出了控制接头材料的横向韧性判据，并以现场失效案例分析为基础，经力学计算初步确定了最低横向冲击功要求，可用于完善修订apirp7g推荐做法的有关内容。