Production of substantially spherical metal powers

A metal powder and metal technology, which is applied in the field of preparation of basically spherical metal powder, can solve the problems of high cost of titanium parts and limited application of titanium.

Active Publication Date: 2016-03-30
UNIV OF UTAH RES FOUND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, apart from the aerospace, medical, and defense industries, titanium is not widely used
This is mainly due to the high cost of manufacturing titanium parts
Its manufacturing cost may exceed twenty times that of general steel

Method used

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  • Production of substantially spherical metal powers
  • Production of substantially spherical metal powers
  • Production of substantially spherical metal powers

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0082] Example 1: Preparation of TiH with UGS 2

[0083] The preparation of TiO is given below 2 powder, and use magnesium to reduce TiO 2 to generate TiH 2 instance of . The ready-to-use UGS with an average particle size greater than 200 μm was ball milled to expose the encapsulated Si and facilitate re-leaching. Ground UGS can easily be several microns in size, eg 1 to 5 microns. Next, 100 g of ground UGS was pre-leached at 100° C. for 2 hours with an alkaline solution containing 200 g / L NaOH, and the volume-to-mass ratio was controlled to be 2:1. After pre-leaching, the slurry was subjected to solid / liquid separation and about 100 grams of residual solids were dried to prepare it for firing treatment. Then, 100 grams of pre-leach residue was mixed with 150 grams of commercial NaOH solid using a tumbler for 30 minutes and the mixture was charged to an Inconel reactor. The reactor was placed in a top loading box furnace. Heat the furnace and track the temperature ...

example 2

[0085] Example 2: Preparation of spray-dried TiH 2 Granules

[0086] Fine TiH 2 Granules are prepared by mixing the granules with a binder and solvent, and spray drying the mixture to form spherical granules. Figure 7 is spherical TiH 2 SEM photographs of the granules. The granules have a size of about 40 microns to about 100 microns.

example 3

[0087] Example 3: Preparation of Partially Sintered Granules

[0088] Fine TiH 2 Granules are prepared by mixing the granules with a binder and solvent, and spray drying the mixture to form spherical granules. The granules were degreased with flowing argon in a tube furnace at a temperature range of 250-400°C for 9 hours. After the debinding phase, the temperature was raised to 700 °C and held for 30 min for dehydrogenation and partial sintering in the same tube furnace. Figure 8 is the SEM picture of partially sintered granules.

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Abstract

A method (100) for producing a substantially spherical metal powder is described. A particulate source metal includes a primary particulate and has an average starting particle size (110). The particulate source metal is optionally ball milled and mixed with a binder in a solvent to form a slurry (120). The slurry is granulated to form substantially spherical granules (130), wherein each granule comprises an agglomeration of particulate source metal in the binder. The granules are debinded (140) at a debinding temperature to remove the binder from the granules forming debinded granules. The debinded granules are at least partially sintered (150) at a sintering temperature such that particles within each granule fuse together to form partially or fully sintered solid granules. The granules can then be optionally recovered to form a substantially spherical metal powder (160).

Description

[0001] Related Patent Applications [0002] This patent application is comparable to U.S. Provisional Patent Application No. 61 / 992,692 filed May 13, 2014, U.S. Provisional Patent Application No. 61 / 044,781 filed September 2, 2014, and U.S. Provisional Patent Application No. 61 / 044,781 filed December 2, 2014. Related to Patent Application No. 62 / 086,524, each of which is incorporated herein by reference. [0003] government interest [0004] none. Background technique [0005] Powder metallurgy is commonly used to manufacture products consisting of pure metals or metal alloys. One or more powdered metals are mixed together and compressed into the desired form. The powdered metal is then sintered by heating the powdered metal until the metal particles bond together. Recently, metal powders have been used in additive manufacturing techniques such as 3D printing using laser or electron beam (EB) techniques. [0006] Titanium is an exemplary metal used in powder metallurgy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/02B22F1/05B22F1/065B22F1/10B22F1/12B22F1/148
CPCB22F3/1021B22F2998/10B22F3/15B22F3/225B22F2009/001B22F2009/043B22F2999/00Y02P10/25C22C1/06B22F1/05B22F1/065B22F1/148B22F10/28B22F10/64B22F10/73B22F10/32B22F1/10B22F1/12B22F1/09B22F9/026B22F1/107B22F9/04B22F3/1025B22F2003/244B22F2301/052B22F10/10B22F2304/15B22F2304/10B22F2302/45Y02P10/20B22F2301/15B22F2301/20B22F2301/205B22F2301/35B22F3/04B22F3/16B22F3/24B22F2201/11C01B6/02
Inventor Z·Z·方Y·夏P·孙Y·张
Owner UNIV OF UTAH RES FOUND
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