Forging method for improving horizontal mechanical property of flat and square forging piece

Abstract

The invention discloses a forging method for improving the horizontal mechanical property of a flat and square forging piece. The secondary upsetting and drawing in different directions can be increased by changing the forging direction to control metal streamline direction in the process, so that the purposes of improving the comprehensive mechanical property while improving the horizontal mechanical property of the forging piece can be fulfilled. The forging method is realized by the following scheme that: a steel ingot is upsetted thick and drawn long, the forging piece is horizontally drawn to be flat and square and is then upsetted thick and drawn long secondarily along the vertical direction, heat treatment is conducted, and finally, mechanical property test is carried out. According to the forging method, the horizontal mechanical property of the forging piece is effectively improved, and the reliability of the forging piece is improved.

Description

technical field [0001] The invention belongs to the technical field of free forging, in particular to a forging method for improving the transverse mechanical properties of flat square forgings. Background technique [0002] At present, flat and square forgings are often used in some fields, and require such forgings to have high transverse strength and longitudinal strength. For example, a 30CrMnSiNi2A flat and square forging for an aerospace industry has complex shapes and special requirements for use. The transverse and tangential mechanical properties of forgings have high requirements and there is no obvious difference. Among them, the transverse tensile strength is greater than 1530MPa, and the tangential tensile strength is greater than 1540MPa. According to the shape of the forging (attached figure 1 ), the traditional process of upsetting and drawing is adopted, the direction of the metal flow line is consistent with the longitudinal direction of the forging, the f...

AI Technical Summary

Problems solved by technology

According to the shape of the forging (attached figure 1 ), the traditional process of upsetting and drawing is adopted, the direction of the metal flow line is consistent with the longitudinal direction of the forging, the forging fiber structure is single, the longitudinal performance is much greater than the transverse tangential performance, the anisotropy of the forging performance is obvious, and the transverse performance is the lowest. It does not meet the technical requirements, and the transverse performance shows a decreasing trend with the increase of forging ratio

At present, the production process design of large forgings mainly focuses on the mechanical performance requirements in the longitudinal and tangential directions of forgings, but does not take into account the transverse performance. When users have high requirements for the transverse mechanical properties of forgings, they are often scrapped because the transverse properties of forgings are unqualified.

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