冷作硬化

成形中冷作硬化现象严重，容易发生胀裂。

Cold hardening phenomena in shaping process can easily result in expanding split .

由实际的应力测试数据，从壁厚强度、设计压力、焊缝系数、冷作硬化等方面进行了研究。

According to accurately measured stress data , the following factors were studied : intensity of the wall thickness , the designed pressure , coefficient of the welding seam and the cold hardening .

接触疲劳过程中的诱发相变和冷作硬化

Induced transformation and cold worked hardening in three steels during contact fatigue

冷作硬化在摩擦型螺栓连接中的应用

Cold Working Strain Harden in the Application of Frictional Type Bolt Connection

钢材经过冷作硬化成型后，材料屈服强度会有明显的提高。

Steel materials will be obviously hardened after the cold - formed process .

扭转冷作硬化的试验研究及分析

Experiment Study and Analyses on Torsion Cold-Work Hardening

板材冷作硬化效应主要取决于母材的强度、伸长率和强屈比，其中强屈比对型钢的冷作硬化效应影响最大；

Strain-hardening are mainly determined by strength , elongation and strength yield ratio of virgin steel , among which the strength yield ratio is the most important influence factor .

根据实验研究的结果对低碳钢圆轴的扭转屈服过程，屈服扭矩的确定，冷作硬化现象和时效处理影响提出了几点新的看法。

According to the test results , some new ideas on tors : onal yield process of low-carbon steel circular axis , definition of yield torque , phenomenon of coldworking hardening and the influence with aging treatment are given .

薄壁不锈钢件的深拉伸由于冷作硬化度很高，每次拉伸后必须进行完全退火后才能继续拉伸，减少拉伸次数至最少是降低成本，占领市场的关键。

Because of the high manufacturing rigidification of deep stretching for the thin-wall stainless steel cylinder , the stretching process can 't continue without completely annealing after last stretching process . The key of reducing cost and occupying the market is to reduce the time of stretching .

冷作模具表面硬化层的耐磨性研究

The Wear-resistance of Surface Hardening Layers on Cold Working Dies