Forging method for maraging steel disc-shaft integrated forged piece

Abstract

The invention discloses a forging method for a maraging steel disc-shaft integrated forged piece. According to the technical scheme for achieving formation of the disc-shaft integrated forged piece through one heating number, avoiding local idle burning of the forged piece and lowering the production difficulty of the forged piece, the traditional final forging temperature of the maraging steel forged piece is adjusted to 750 DEG C from 820-870 DEG C, the traditional technique that disc upsetting is conducted after rod pulling is changed into the technique that rod pulling is conducted after disc upsetting, then effective protective measures are taken in the deformation process of the forged piece, and the effect that formation of the forged piece is completed through one heating number on the premise that the requirement for the final forging temperature is met is guaranteed. According to the technical scheme, the operability is high, the forging method is suitable for popularization, and the preparation technique for the disc-shaft integrated forged piece and particularly for a large disc-shaft integrated forged piece with the length exceeding 2000 mm is remarkably improved.

Description

Technical field [0001] The invention belongs to the technical field of forging and relates to a method for forming a maraging steel disc shaft integrated forging. Background technique [0002] The materials used for aeronautical transmission components are mainly maraging ultra-high-strength steels. Maraging steels are the highest-strength steels. Compared with other ultra-high-strength steels of the same strength level, they have higher toughness and are existing materials. The steel with the highest ratio of strength and toughness in the medium is often used in the manufacture of aero-engine fan shafts and low-pressure turbine shafts. [0003] At present, the forgings used for aero transmission components are formed integrally with the disc shaft, which can avoid the problems of uneven structure and stress concentration caused by separate forming and re-welding, but it increases the forming of the forgings and the difficulty of metallurgy. In order to ensure the full recrystalli...

AI Technical Summary

Problems solved by technology

The biggest disadvantage of the traditional process is that the process of upsetting the forging and pulling the rod is carried out separately, so that there is a problem of local empty burning of the forging, and the empty burning is more likely to cause metallurgical problems such as coarse grains of the forging, unqualified strength and plasticity indicators, etc. , and the length of the forging is greatly increased after the rod is drawn, which brings great technological difficulties to the subsequent forging heating and upsetting process