surface-hardened steel

Upon repeated exposure to the relatively high interfacial temperatures be-tween the steel surface and the oil, petroleum oils undergo thermal and oxidative degradation leading to significant varia-tion in their quenching performance.

由于不断暴露在钢与油接触面间相对较高的温度中，石油制品油遭受热降解和氧化降解，使得其淬火特性发生明显变化。

Abstract This paper investigated the technology to produce ceramic coating in inner surface of steel pipe by state thermit SHS method. The technological factor to influence the coating quality had been determined. The microstructure and hardness distribution of coating was also determined.

本文研究静态、铝热&自蔓延高温合成方法形成钢管内表面陶瓷涂层的工艺，确定了影响涂层质量的工艺因素，并分析了陶瓷涂层的组织和硬度分布。

The method to measure the stress state on surface of material was introduced, and the state as well as the thermal relaxation behavior of residual stress for cross weld of low carbon steel was investigated.

介绍了材料表面应力状态的X射线测量方法，研究了低碳钢交叉焊缝残余应力状态及其热松弛行为。

Tribological Properties of Steel Surface Layers after Complex Thermochemical Treatment

复合化学热处理钢表面层的摩擦学性能

Superplastic Diffusion Welding of Thermal Spraying Layer on Die Steel Surface

模具钢表面热喷熔层的超塑性扩散焊接