回火

When used carburization and tempering, filling baskets should be designed according to different parts of horizontal

当用于渗碳及回火时，装料筐设计应根据不同工件设计横向和纵向气道，使碳势气氛和热风能均匀通过工件每一点，使工件渗碳层或回火均匀。

The influence of the K/Na modificator on structure and performance of high chromium cast iron was investigated.

考察了K/Na变质剂对高铬铸铁组织和性能的影响，确定了合金的熔炼工艺和热处理工艺，得出最佳的淬火和回火工艺温度(淬火1000℃+450℃回火)。

The mechanical properties of oil hardening and tempering spring wire were introducer in this paper, The process and system constitutes for spring wire with induction heating were proposed, The operation principle of this system was also discussed.

介绍了油回火弹簧钢丝的力学性能，给出了油回火弹簧钢丝感应加热生产工艺流程及系统组成，简述了系统各部分的技术功能及特点。

The experiment results show that the microstructure of test cast steel is lath bainite and retained austenite at various tempering holding time.

结果表明。不同回火时间下材料的组织为贝氏体铁素体和残余奥氏体组成。2h以下回火材料的强度、韧性、硬度升高。

In the meantime, the two kinds of processes that reduce hardness on thread:induction tempering and localized anti-carburization are analyzed. It is concluded that induction tempering is an effective way to avoid delayed fracture on pitman shaft thread.

同时，对目前普遍采用的感应回火和局部防渗碳保护工艺的特点进行了分析，认为感应回火能同时有效地降低表面和心部硬度，是预防摇臂轴螺纹延迟断裂的有效方法。

The reliability technique is used to analyse why the back fire preventer failed to stop the fire .

应用可靠案件技术分析了回火防止丧失阻火作用的原因，提出了确保回火防止器安全可靠性的具体措施。

The precipitation rules of temper ed carbides of a novel quick-firer steel were systematically studied by means of OM,SEM,EDS and XRD analysis.

通过光学金相、扫描电镜及能谱和X射线分析研究了新型炮钢回火碳化物的析出规律，发现：当回火温度高于620℃时，除渗碳体外，还析出合金碳化物Mo2C，并在640℃达到峰值。

It was found that after high vacuum annealing , the density, maximum energy product and remanence of magnets become lower.

为研究回火过程中真空度对烧结NdFeB磁体显微结构及磁性能的影响，对烧结态磁体采用不同的真空度进行回火。

The result indicated that the microstructure of the steel consisted of tempering troostite and tempering sorbite.

结果表明，钢的组织主要由回火屈氏体与回火索氏体组成。

It is found that the fine tempering sorbite is obtained in condition of 930℃ direct quenching temperature and 640℃ tempering temperature after controlled rolling.

结果表明：经奥氏体再结晶区和未再结晶区两阶段结合控制轧制后在线930℃直接淬火、640℃回火，钢板可获得均匀、细小的回火索氏体组织，其综合力学性能均超过标准要求。

Objective: To study the effect of polycythemia on blood oxygen saturation.

裴蕾目的：观察RBC剧增而引起的高粘血症对血氧饱和度的影响。

Based on SIMPLER algorithm in the curvilinear body-fitted coordinates, the calculations were performed for Pr=0.7, Re=10~1000 on non-orthogonal non-staggered grids which are generated by elliptic equation systems.

采用曲线坐标系下压力与速度耦合的SIMPLER算法，数值研究了周期性渐扩渐缩波纹通道内脉动流动与换热情况，流动Re数的范围为10~1000，Pr数为0.7。