zone of cracking

The weldability of 800 MPa high strength steel has been studied with 20 mm and 42 mm thickness plates by the maximum hardness test of heat-affected zone, Y slit cracking test and the test of weld energy input etc.

采用热影响区最高硬度试验、斜Y型坡口裂纹试验及焊接线能量的测试等手段研究了板厚分别为20mm及42mm的800MPa高强钢的焊接性。

The lower overpressure system resulted from hydrocarbon generation and cracking, and its high overpressure zone is located on the south of No. 2 fault zone.

下超压系统主要由烃类的大量生成和裂解引起，强超压区分布在2号断裂带以南；

It follows that, minimizing the deformation as well as maintaining the deformations of each zone compatibly was the criteria of avoiding cracking.

从而确认防止裂缝的关键是减小变形并使变形协调。

Study on the application of post-pouring concrete zone to control of temperature cracking during construction of sluice gate piers

后浇带在闸墩施工温度裂缝控制中的应用研究

The results showed that tempered soft zone in harden zone case produced in process of discontinuous medium frequency induction hardening which has microstructure of tempered sorbite and low hardness and low fatigue limit were major reason to cause driven gear cracking.

结果表明，因中频淬火的不连续，使淬硬层出现了回火软区，组织为回火索氏体，降低了材料的硬度和疲劳极限，最终导致从动齿轮开裂。