Vacuum cementation furnace 750 degrees centigrade low temperature cementation process of precision parts

Abstract

The invention provides a vacuum cementation furnace 750 degrees centigrade low temperature cementation process of precision parts. Cementation treatment can be carried out on metal parts at a temperature of 750 degrees centigrade; the metal parts treated by using the vacuum cementation furnace 750 degrees centigrade low temperature cementation process of the precision parts can realize uniform carburized layer, higher quenching hardness and steeper carburized layer gradient; the metal parts can realize lower fragility after annealing treatment and bending test; the bent surfaces of the metal parts have no phenomena of surface peeling, lifting and fracture; a vacuum cementation furnace using the vacuum cementation furnace 750 degrees centigrade low temperature cementation process of the precision parts does not generate intergranular oxidation in the carburizing process of the metal parts and can enhance the fatigue resistance of a workpiece material; and moreover, the surfaces of the carburized and quenched metal parts cannot generate black carbon deposit to be beneficial for follow-up electroplating processing; in addition, dotted or block-shaped carbide and residual austenite arealso not seen in the carburized layers of the produced parts; and the carburized layer and a matrix possess good bonding strength and good toughness; and the organization structure is excellent.

Description

technical field [0001] The invention relates to a 750°C low-temperature carburizing process in a vacuum carburizing furnace for precision parts. Background technique [0002] The traditional vacuum carburizing furnace has been widely used in the manufacturing industry, and the carburizing process temperature of the traditional vacuum carburizing furnace is above 860°C. However, with the rapid development of science and technology, the carburizing process of the traditional vacuum carburizing furnace can no longer meet the new requirements of modern industry. Some modern industrial products have the following new requirements for metal parts after carburizing: 1. For metal parts The manufacturing has higher precision requirements, for example, it is required to have less deformation after carburizing and quenching, so as to maintain higher dimensional accuracy or meet smaller tolerance requirements, reduce subsequent processing processes, and achieve the purpose of reducing c...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a 750°C low-temperature carburizing process in a vacuum carburizing furnace for precision parts. The parts produced by using it can achieve smaller dimensional deformation and have higher surface strength, which solves the traditional The temperature of the carburizing process in the vacuum carburizing furnace is above 860°C. The parts after carburizing and quenching treatment cannot achieve small deformation, maintain high dimensional accuracy or meet small tolerance requirements, and cannot reduce Subsequent processing, unable to reduce costs, the surface of metal parts cannot be kept clean after carburizing, quenching and tempering, and SPCC materials cannot be vacuum carburized and quenched at a temperature of 750 ° C.

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