Roll forming and heat treatment method of Ti2AlNb-based alloy cartridge receiver ring element

Abstract

The invention discloses a roll forming and heat treatment method of a Ti2AlNb-based alloy cartridge receiver ring element. The roll forming and heat treatment method comprises the following steps that a Ti2AlNb alloy bar subjected to cogging is loaded into a high-temperature heating furnace to be heated to 1000 DEG C to 1050 DEG C, after the heat preservation is carried out for 80 minutes, the upsetting and the drawing out are carried out at a strain rate being 0.01S<-1>, then, the upsetting and the punching are carried out, and a Ti2AlNb-based alloy cartridge receiver ring blank is obtained; the Ti2AlNb-based alloy cartridge receiver ring blank is rolled at a strain rate being 0.01S<-1>, the rolling process is completed in the heating times being 3 to 5, the lowest temperature in each heating time is 900 DEG C, and the total deformation quantity in the rolling process is 25 percent to 45 percent; after the forging, the Ti2AlNb-based cartridge receiver ring element is subjected to solid solution and aging heat treatment. The roll forming and heat treatment method has the advantages that the Ti2AlNb-based alloy cartridge receiver ring element can be formed at lower deformation temperature, and in addition, fine crystal and basket-weave microstructures with excellent performance are obtained.

Description

technical field [0001] The invention relates to a rolling forming and heat treatment method of casing rings, in particular to a Ti 2 Roll forming and heat treatment method of AlNb-based alloy casing ring. Background technique [0002] Ti 2 AlNb-based alloy is a new type of lightweight high-temperature structural material. It is an intermetallic compound composed of Ti, Al and Nb. This type of alloy has O phase, B2 / β phase and α phase. 2 The phase is a two-phase or three-phase composite structure, which has the advantages of low density, high elastic modulus, high temperature strength, high fracture performance, high creep resistance, low thermal expansion performance, non-magnetic properties and good flame retardancy. Compared with high-temperature titanium alloys, it has higher service temperature, creep resistance and high-temperature strength, and its density and thermal expansion coefficient are significantly lower than nickel-based superalloys. It is the best substitu...

AI Technical Summary

Problems solved by technology

[0003] Ti 2 Although the AlNb-based alloy has many advantages, it has a fatal weakness, that is, the forgeability of the alloy is very poor, and it is very easy to cause forging cracks if it is not well controlled.