Carburized straight ejector rod product machining method

Abstract

The invention relates to a carburized straight ejector rod product machining method. The method comprises the steps that firstly, an alloy steel raw material is subjected to surface carburizing treatment, secondly, carburized alloy steel is subjected to heat treatment, finally, carburized alloy steel ejector rod machining is conducted, and a straight ejector rod which is high in toughness and hardness, uniform and low in reject ratio is obtained. The method is simple and easy to popularize, the cost is effectively reduced, and the problems that in the prior art, even though the hardness of a nitriding layer is high, the depth of the nitriding layer is small, the nitriding hardness is uneven, and bending and distortion occur to a product are solved.

Description

Technical field [0001] The present invention focuses on a brand-new production process for straight jack products, mainly a processing that can improve product raw materials, especially the surface toughness and hardness of alloy tool steel, and thereby improve the wear resistance and fatigue resistance of straight jack products. method. Background technique [0002] At present, there are two main types of traditional mold straight ejector pins on the market: one is made of ordinary alloy tool steel without any treatment as raw materials. The mold straight ejector pins made of this material have surface hardness and durability. There are large defects in wearability, fatigue strength, seizure resistance, etc., and it is difficult to meet the requirements of mold use. The ability to resist atmospheric and superheated steam corrosion and temper softening is also poor, and the notch sensitivity is high. It is a lower grade product among the straight ejector pins of the mold. [0003...

AI Technical Summary

Problems solved by technology

However, due to the low hardness of the core and the shallow penetration layer, it can generally only meet the wear resistance and fatigue resistance requirements of light and medium loads, and the heat resistance and corrosion resistance have not reached the use effect of hot work molds; After nitriding, it is also found that the surface nitriding hardness is uneven, which is not easy to control, indicating that the nitrides are not well dissolved and diffused into the product; moreover, distortion and bending of the steel are also prone to occur during the nitriding process, which in turn increases the defective rate of the product

[0004] Therefore, there is an urgent need for a new processing technology in this field to produce a brand-new mold straight ejector pin to solve the phenomenon that although the hardness of the nitriding layer is high but the nitriding layer is shallow, the nitriding hardness is uneven, and the product is bent and distorted.