The application of compressed-air operation in shield construction of subway;
压气作业在地铁盾构施工中的应用
Optimization of well killing method for high pressure gas wells;
高压气井压井方法的优选
Application examples of gas logging parameters combined with drilling time in the well control of the high pressure gas well.;
气测录井参数结合钻时在高压气井井控中的应用实例
Thread sealing property in high temperature and high pressure gas wells is more important than that in oil wells.
高温高压气井对螺纹密封性的要求要比油井更为严格。
In order to study high pressure gas quenching process completely and exactly,the numerical model was established by use of the finite volume method to coupled compute gas velocity,temperature field of gas and workpiece and phase transformation inside workpiece during high pressure gas quenching process.
应用有限体积法建立了数学模型,对高压气淬过程中气体的速度场、气体和工件的温度场以及工件内部的组织场进行了耦合计算,针对一组小棒料高压气淬的模拟结果,分析了气体流动、工件温度与相变各自的影响因素以及它们之间的相互影响,指出几何模型准确建立的重要性。
low pressure vacuum carburizing and high pressure gas quenching,was adopted to ring gear of motors.
本文通过对轿车齿套的试验证明 ,采用低压真空渗碳 +高压气淬的热处理方法 ,可得到较小的变形 ,且具有环保、节能、无表面内氧化、生产率高等优点。
This article analyzes some main factors that decide the effect of high pressure gas quenching, introduces the development of international and domestic studies on high pressure gas quenching vacuum furnaces, and points out the major problems and the developing trend of domestic furnaces.
分析了影响真空高压气淬设备淬火效果的因素 ,介绍了真空高压气淬技术和设备的国内外研究情况 ,指出了目前国产设备存在的主要问题及今后一段时间的研究方