目前国内高频淬火钻杆的使用寿命普遍较低,且其年消耗量又大,因而这是一个急待解决的问题。我们认为,影响目前国内钻杆使用寿命的一个最主要因素,是高频淬火淬硬层深度的合理选定。对于某一具体用途的零件来说,高频淬火时淬硬层深度的选定,通常是根据该零件的厚度或半径来决定的。本 At present, the service life of high frequency quenched drill pipe is generally low, and its annual consumption is large, so this is an urgent problem to be solved. In our opinion, one of the most important factors that affect the service life of drill pipe in China at present is the reasonable selection of the depth of high-frequency hardening hardened layer. For a specific use of parts, hardened hardened layer depth of induction hardening, the selection is usually based on the thickness or radius of the part to decide. this