一种细晶钛合金的复合制备方法

Composite preparation method for fine crystal titanium alloy

Abstract

本发明涉及一种细晶钛合金的复合制备方法,将氢化脱氢钛合金粉末经过冷等静压、真空烧结,然后采用相变点以上中等应变速率的第一火次高温等温锻造,闭合粉末合金内部孔隙、提高合金致密度、改善合金塑性,再采用相变点以下中等应变速率的第二火次低温等温锻造,进一步密实和细化粉末钛合金,最后热处理获得高致密度细晶化的粉末钛合金。该制备方法有效缩短普通铸锻钛合金的制备周期,减少原材料损耗,可同时成形出近净形精密锻件,制备出的粉末钛合金无成份偏析,致密度大于99%,等轴组织均匀细小,α相尺寸小于2μm,力学性能优良。
The invention relates to a composite preparation method for a fine crystal titanium alloy, which comprises the following steps of: performing cold isostatic pressing and vacuum sintering on hydrogenated dehydrogenation titanium alloy powder, then performing first heating high-temperature isothermal forging by adopting medium strain rate over a transformation point to close internal holes of the powdery alloy, improve the compactness of the alloy and improve the plasticity of the alloy, performing second heating low-temperature isothermal forging by adopting medium strain rate below the transformation point to further compact and thin the powdery titanium alloy, and finally performing thermal treatment to obtain the high-compactness fine crystal powdery titanium alloy. According to the preparation method, the preparation period of common forged titanium alloy is effectively shortened, the loss of raw materials is reduced, near net shape precision forgings can be simultaneously formed, the prepared powdery titanium alloy has no component segregation, the compactness is more than 99 percent, the equiaxial tissues are uniform and fine, the size of alpha phase is less than 2 microns, and the mechanical property is excellent.

Claims

Description

Topics

Download Full PDF Version (Non-Commercial Use)

Patent Citations (5)

    Publication numberPublication dateAssigneeTitle
    CN-101480689-AJuly 15, 2009贵州安大航空锻造有限责任公司Near-isothermal forging method of two-phase titanium alloy disk-type forgeable piece
    CN-1032962-AMay 17, 1989西北工业大学, 宝鸡有色金属加工厂Technology of equiaxial miniaturization of crystal microstructure of alpha+beta titanium alloys
    JP-H06212378-AAugust 02, 1994Daido Steel Co Ltd, 大同特殊鋼株式会社Treatment of beta type titanium alloy hot formed product
    US-2006157543-A1July 20, 2006Stanley Abkowitz, Abkowitz Susan M, Harvey Fisher, Schwartz Patricia JFine grain titanium-alloy article and articles with clad porous titanium surfaces
    US-5026520-AJune 25, 1991Cooper Industries, Inc.Fine grain titanium forgings and a method for their production

NO-Patent Citations (1)

    Title
    《中国有色金属学报》 20101031 郭鸿镇,等 等温精密锻造技术的研究进展 570-576 权利要求1 第20卷, 第专辑1期 2

Cited By (6)

    Publication numberPublication dateAssigneeTitle
    CN-102319853-AJanuary 18, 2012西部钛业有限责任公司Production method for TA19 titanium alloy strip
    CN-102319853-BJanuary 23, 2013西部钛业有限责任公司一种ta19钛合金板条的制备方法
    CN-104263981-AJanuary 07, 2015福建龙溪轴承(集团)股份有限公司, 中南大学一种粉末冶金钛合金棒材的制备方法
    CN-104551571-AApril 29, 2015哈尔滨工业大学Method for producing members through near-isothermal stamping by aid of TiAl pre-alloy powder
    CN-104646578-AMay 27, 2015中国航空工业集团公司沈阳飞机设计研究所一种钛合金整体框形件的等温锻造方法
    CN-105039781-ANovember 11, 2015无棣向上机械设计服务有限公司Composite heat-resistant titanium alloy