Forging process for Cr12MoV steel

Abstract

The invention provides a forging process for Cr12MoV steel. The forging process is characterized by comprising (1) a preheating stage, specifically, before a forging is placed into a furnace, primary preheating treatment is conducted in the furnace firstly, and injection heating is conducted on dead corners inside the furnace so that the temperature in the furnace can reach 270 DEG C evenly; (2) a heating stage, specifically, the forging is placed into the well preheated furnace to be heated, and the forging is overturned continuously in the heating process; (3) a forging stage, specifically, the forging heated to the required temperature is taken out to be subjected to forging, the principle of gentle beating and slight hitting is observed in the forging process, upsetting and rolling are repeatedly conducted, twice heating forming is conducted at the same time, and the forging ratio is greater than 3; and (4) a cooling treatment stage, specifically, a sufficient heat-preservation time period in the heating process is guaranteed, segregation of the center and smashing of network carbides can be conducted conveniently in the forging process, the plasticity is improved, and the forging difficulty is reduced.

Description

technical field [0001] The invention relates to the field of forging processing and auxiliary parts, in particular to the improvement of the forging processing method of Cr12MoV steel, and in particular to a forging processing technology of Cr12MoV steel. Background technique [0002] With the vigorous development of the forging industry and the continuous growth of the national economy, the demand for large-scale internal and external stepped cylindrical forgings is increasing day by day. With the advancement of science and technology, the development trend of industrial machines to high performance, high parameters, and large-scale is obvious. Cr12MoV is the mold Steel, high in C and Cr, poor plasticity, poor thermal conductivity, improper temperature control during heating, prone to overheating and overburning defects. At the same time, due to the presence of segregation and reticular carbides in the core of the steel ingot, cracks are likely to occur in the core during f...

AI Technical Summary

Problems solved by technology

[0002] With the vigorous development of the forging industry and the continuous growth of the national economy, the demand for large-scale internal and external stepped cylindrical forgings is increasing day by day. With the advancement of science and technology, the development trend of industrial machines to high performance, high parameters, and large-scale is obvious. Cr12MoV is the mold Steel, high in C and Cr, poor plasticity, poor thermal conductivity, improper temperature control during heating, prone to overheating and overburning defects

At the same time, due to the presence of segregation and network carbides in the core of the steel ingot, cracks are likely to occur in the core during forging, making forging difficult, seriously wasting materials, and increasing production costs.

Images