tempering oil

It is proper for middle treatment to adopt high temperature tempering after oil quenching and three-time high temperature tempering is adopted as final heat treatment.

中间处理采用750℃×5h高温回火为宜，最终热处理采用油淬后三次高温回火。

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The results showed that two of surfacing layers under 850 ℃ air cooling, 850 ± 5 ℃ oil cooling and 400 ℃ tempering had higher hardness and better wear corrosion resistance, and the technological processes were simplified as well.

结果表明，两种硬质合金堆焊层经850℃空冷、850±5℃油淬+400℃回火后，均具有较高的硬度和优异的耐腐蚀磨损性能，且简化了表面处理工艺。

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Outside diameter of high-strength oil casing produced by tempering process would change, and this is unfavorable to thread machining.

针对用调质方式生产的高强度石油套管，其外径形态会发生变化，不利于车丝加工。

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Based on the basic mechanical theory and practice, and on the needs in the performance of petroleum mechanical products used in oil recovery, we raise a method to cool the long metal tube evenly after the hardening and tempering.

根据石油开采业对石油机械产品的需求，利用机械理论基础知识，通过实践设计，提出了对几何尺寸长的金属管类进行调质处理后的均匀冷却方法，以满足其性能要求。

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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。

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