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An alloying system

A technology of alloying and mechanical alloying, which is applied in the field of alloying systems, can solve the problems of increasing alloy density, limiting alloy machinability, increasing weight, etc., and achieves the effects of low processing cost, good surface finish, and improved dimensional accuracy

Inactive Publication Date: 2007-09-12
AGENCY FOR SCI TECH & RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the aluminum addition is greater than 5 wt%, it leads to the formation of intermetallic compounds in the alloy, which can limit the workability of the alloy
Excess vanadium additions increase the density of the alloy, thereby increasing its weight

Method used

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  • An alloying system
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Examples

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Embodiment Construction

[0052]Referring to Figures 1A and 1B, an alloying system 10 is provided for preparing and forging titanium alloys at temperatures as low as 200-400°C. The system includes a roller mill 20 . The tumbler mill 20 mechanically alloys the mixture 22 of elemental powders in a preferably inert atmosphere such as argon. Elemental powders 22 are weighed in predetermined proportions. Elemental powder 22 includes titanium particles, alpha stabilizer particles (aluminum) and beta stabilizer particles (iron and zirconium). The mixture 22 is mechanically alloyed with low impact energy provided by the roller mill 20 to layer the titanium particles with the beta stabilizer particles. Referring to FIG. 1B , a series of photographs show that the roller mill 20 can asynchronously rotate on an elliptical orbit about the midpoint of the top and bottom of the roller. This causes the charge 22 and pellets 21 to move within the drum, with each rotation the pellets 21 impact on a new surface. The ...

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Abstract

An alloying system for preparing a titanium alloy, the system comprising a rotating mill to mechanically alloy a mixture of elemental powders in predetermined proportions, the elemental powders including titanium particles, alpha stabilizer particles and beta stabilizer particles; wherein the mixture is mechanically alloyed using low impact energy to layer the titanium particles with beta stabilizer particles whereby sintering of the mechanically alloyed mixture produces alternate layers of alpha and beta stabilizer particles.

Description

technical field [0001] The invention relates to an alloying system for preparing titanium alloys. In particular, the present invention relates to an alloying system for producing titanium alloys for cold forging. Background technique [0002] Titanium (Ti) alloys are useful in a variety of structural applications. Existing Ti alloys use a wide range of alloying elements to provide specific desired properties, such as increased tensile strength and ductility. Typically, Ti alloys exist in one crystal structure or as a mixture of two basic crystal structures: the alpha phase, which is a hexagonal close-packed (HCP) structure, and the beta phase, which is a body-centered Cubic (BCC) structure. Pure titanium undergoes an allotropic transition from alpha to beta phase at about 882 °C. Elements that enable higher transition temperatures are called alpha stabilizers and include aluminum and lanthanum. Elements that make the transition temperature lower are called beta stabiliz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/04C22C1/06C22C1/08C22C14/00B22F1/00
CPCB22F9/04B22F2003/175B22F2009/041B22F2009/043B22F2998/10B22F2999/00C22C1/0458C22C14/00B22F3/02B22F3/10B22F3/17
Inventor 查卓瑟卡兰·马格姆张苏霞何明光
Owner AGENCY FOR SCI TECH & RES