Non-quenched and tempered composite shaft part

Abstract

The invention relates to the field of shaft parts, in particular to a non-quenched and tempered composite shaft part. The non-quenched and tempered composite shaft part is prepared from, by mass, 0.6%-1.25% of C, 0.55%-0.62% of Si, 1.00%-1.18% of Cr, 0.2%-0.3% of Mo, 0.01%-0.03% of Al, smaller than or equal to 0.038% of P, smaller than or equal to 0.04% of S, smaller than or equal to 0.03% of Cu and the balance Fe and unavoidable impurity elements. A method for manufacturing the non-quenched and tempered composite shaft part comprises the following steps that 1, shaft part pretreatment is conducted; 2, the pretreated shaft part is put into a furnace to be subjected to carburizing operation; 3, carburizing is conducted for 8 h, the shaft part is taken out, and the quality of a surface carburized layer is inspected. According to the method, surface severe plastic deformation pretreatment is conducted on the shaft part, and then carburizing is conducted, so that the carbonation process is accelerated, the reaction temperature is decreased, and meanwhile the comprehensive effects of improving the comprehensive property of the part and reducing the cost are achieved; the cost is reduced, the structure is refined, and the strength and impact toughness are significantly improved.

Description

technical field [0001] The invention relates to the field of shaft parts, in particular to a non-quenched and tempered composite shaft part. Background technique [0002] In industrial products, shaft parts are suitable for one or more CNC bed machined part maintenance operations. Shaft parts are one of the typical parts often encountered in hardware accessories. They are mainly used to support transmission parts, transmit torque and bear loads. According to the different structural forms of shaft parts, they can generally be divided into optical shafts, stepped shafts and special-shaped shafts. Three types of shafts; or divided into solid shafts, hollow shafts, etc. [0003] The production of most types of shaft parts is to carry out corresponding heat treatment after processing the rolled material to meet the performance of the shaft parts. When the incoming parts are rolled parts, the comprehensive mechanical properties obtained by conventional heat treatment methods ar...

AI Technical Summary

Problems solved by technology

When the incoming parts are rolled parts, the comprehensive mechanical properties obtained by conventional heat treatment methods are not high, and the plasticity and toughness indicators generally do not meet the design requirements.

In addition, when there are defects in raw materials, there is also a risk of cracking in high-temperature quenching using conventional processes (850-860°C, oil cooling)