Heat treatment method for regulating and controlling microstructure and microhardness of near-beta titanium alloy

A heat treatment method and microstructure technology, applied in the field of titanium alloy processing, to achieve the effects of improving mechanical properties and functional properties, improving stability, and improving alloy performance
CN112210736AActive Publication Date: 2021-01-12NORTHWESTERN POLYTECHNICAL UNIV
5 Cites 3 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NORTHWESTERN POLYTECHNICAL UNIV
Publication Date
2021-01-12

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a heat treatment method for regulating and controlling a microstructure and a microhardness of a near-beta titanium alloy, which comprises the following steps: S1, selecting heat treatment raw materials, and carrying out cogging forging treatment on an alloy cast ingot to form a bar; S2, performing solid solution treatment, specifically, after a heat treatment furnace is heated to + / -50 DEG C near a titanium alloy beta phase transformation temperature of the bar, putting the bar in the heat treatment furnace to be subjected to heat preservation, then quenching the bar,thereby obtaining a sample with a large number of metastable beta phases; and S3, performing subsequent heat treatment, specifically, slowly heating the sample from the room temperature, introducingexternal elastic tensile stress or compressive stress in the heating process, and quenching after the sample reaches the preset temperature. Elastic stress fields act on the Ti-7333 alloy in the heattreatment process, so that refined regulation and control over the microstructure of the Ti-7333 alloy can be achieved, i.e., preferred orientation of an alpha precipitated phase is formed, and the effect of enhancing the microhardness of the near-beta titanium alloy Ti-7333 is achieved.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of titanium alloy processing, and in particular relates to a heat treatment method for controlling the microstructure and microhardness of a near-beta titanium alloy. Background technique

[0002] Titanium and titanium alloys have excellent comprehensive properties such as high specific strength, high specific modulus, high toughness, high damage tolerance, antimagnetic and good corrosion resistance, and are one of the important materials for the preparation of large aerospace structural parts. At present, the commonly used high-strength titanium alloys in the world mainly include metastable β-type alloys and near-β-type titanium alloys. The alloy whose β transformation point is lower than room temperature, among them, the metastable β titanium alloy contains enough β stable elements, and the small-sized sample can retain the full β phase without martensitic transformation. This type of alloy has medium str...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More