Machining method of slender shaft made of17-4PH stainless steel material

Abstract

The invention belongs to the technical field of material machining and particularly relates to a machining method of a slender shaft made of a 17-4PH stainless steel material. The machining method of the slender shaft made of the 17-4PH stainless steel material at least includes the steps of firstly, stress relief annealing heat treatment, secondly, slender shaft end face machining and drilling, thirdly, determination of the grinding benchmark of the slender shaft, fourthly, rough turning, semi-finish turning and penetration flaw detection, fifthly, solid solution and aging thermal treatment, sixthly, grinding treatment, seventhly, surface quenching and annealing heat treatment and eighthly, obtainment of the slender shaft, wherein the slender shaft obtained in the seventh step is subjected to finish grinding, a plug is removed, the following conventional shaft end fine dressing or end cut-off is conducted, and the finished slender shaft is obtained. By the adoption of the method, the defect that the machining rejection rate of the slender shaft made of the 17-4 PH stainless steel material is high at present can be effectively overcome, the high-precision shape of the slender shaft and the surface roughness machining of the slender shaft are guaranteed, the machining efficiency of the slender shaft is improved, and the yield is increased.

Description

technical field [0001] The invention belongs to the technical field of material machining, and in particular relates to a method for machining a slender shaft of 17-4PH stainless steel material. Background technique [0002] 17-4PH belongs to precipitation hardening stainless steel. The so-called precipitation hardening refers to the precipitation of fine intermetallic compounds and some small amount of carbides in stainless steel through heat treatment to produce hardening, so as to obtain high-strength stainless steel with high strength and certain corrosion resistance. This alloy material is widely used in the manufacture of mechanical equipment and components that require heat resistance, corrosion resistance and high strength, such as pump shafts. However, when the alloy is used as a slender shaft with a length-to-diameter ratio greater than 25, since the surface roughness Ra of the shaft is required to be between 0.1 and 0.8, and the rigidity of the slender shaft itsel...

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Problems solved by technology

However, when the alloy is used as a slender shaft with a length-to-diameter ratio greater than 25, since the surface roughness Ra of the shaft is required to be between 0.1 and 0.8, and the rigidity of the slender shaft itself is poor, the surface of the slender shaft must be processed. During machining, under the action of cutting force and cutting heat, etc., it is easy to generate vibration and bending deformation, resulting in the scrapping of the shaft

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