一、前言随着石油工业和钻探技术的发展,对石油管和接头的需要量迅速增加,并且普遍应用高强度的合金钢材料。这对加工石油管螺纹用的刀具提出了更新、更高的要求。目前生产中使用的普通硬质合金螺纹梳刀,由于切削寿命低,已满足不了生产日益发展的需要。因此,国家每年要花大量外汇用于进口国外工业发达国家在70年代中期研究成功的涂层硬质合金螺纹梳刀。 I. INTRODUCTION With the development of the oil industry and drilling technology, the demand for petroleum pipes and joints has rapidly increased, and high-strength alloy steel materials are commonly used. This new and higher requirements for the processing of tools for the oil pipe thread. The current production of common carbide thread comb knife, due to low cutting life, can not meet the growing needs of production. Therefore, every year the country spends a lot of foreign exchange for the import of coated cemented carbide combs that have been successfully researched in developed countries in foreign countries in the mid-1970s.