US20200061712A1 - Titanium based product and method for manufacturing the same - Google Patents

Titanium based product and method for manufacturing the same Download PDF

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Publication number
US20200061712A1
US20200061712A1 US16/218,620 US201816218620A US2020061712A1 US 20200061712 A1 US20200061712 A1 US 20200061712A1 US 201816218620 A US201816218620 A US 201816218620A US 2020061712 A1 US2020061712 A1 US 2020061712A1
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United States
Prior art keywords
titanium
ingot
based product
product
control mode
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US16/218,620
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English (en)
Inventor
Chia-Hung CHANG
Han-Chou Liao
Shih-Wei Lee
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Catcher Technology Co Ltd
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Catcher Technology Co Ltd
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Assigned to CATCHER TECHNOLOGY CO., LTD. reassignment CATCHER TECHNOLOGY CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHANG, CHIA-HUNG, LEE, SHIH-WEI, LIAO, HAN-CHOU
Publication of US20200061712A1 publication Critical patent/US20200061712A1/en
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/11—Making porous workpieces or articles
    • B22F3/1146—After-treatment maintaining the porosity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/1017—Multiple heating or additional steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/1003—Use of special medium during sintering, e.g. sintering aid
    • B22F3/1007—Atmosphere
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/1039—Sintering only by reaction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles
    • B22F2003/247—Removing material: carving, cleaning, grinding, hobbing, honing, lapping, polishing, milling, shaving, skiving, turning the surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2201/00—Treatment under specific atmosphere
    • B22F2201/01—Reducing atmosphere
    • B22F2201/013—Hydrogen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2201/00—Treatment under specific atmosphere
    • B22F2201/20—Use of vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2203/00—Controlling
    • B22F2203/11—Controlling temperature, temperature profile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2301/00—Metallic composition of the powder or its coating
    • B22F2301/20—Refractory metals
    • B22F2301/205—Titanium, zirconium or hafnium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2304/00—Physical aspects of the powder
    • B22F2304/10—Micron size particles, i.e. above 1 micrometer up to 500 micrometer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps

Definitions

  • the present disclosure relates to a titanium based product and a method for manufacturing the same, and more particularly to a two-stage sintered titanium based product and a method for manufacturing the same.
  • Titanium and its alloys have many advantages such as stable chemical properties, high strength, low weight, high temperature resistance, high corrosion resistance, and high biocompatibility.
  • the application industries of titanium alloys widely include automobile, ship, medicine, entertainment equipment, and mobile electronic device.
  • the main methods for shaping titanium and its alloys include casting, forging and powder metallurgy. Although the casting and forging methods have simpler operations, it is difficult to produce products having complex structures and shapes therewith, and the products produced thereby may have poor precision.
  • the powder metallurgy method is a technique that uses a powder material to form a metal product by shaping and sintering. In contrast, the powder metallurgy method can solve shaping problems associated with components with complex shapes.
  • the conventional powder metallurgy method is provided with only one sintering step for the formation of the titanium or titanium alloy material.
  • the one-stage sintered titanium or titanium alloy material is difficult to be precisely processed.
  • the equipment used to process the one-stage sintered titanium or titanium alloy material may have a high wear rate and thus result in a high processing cost.
  • the present disclosure provides a method for manufacturing a titanium based product, which can overcome the problems associated with the shaping of titanium or titanium alloy products, and a titanium based product manufactured by the method.
  • the present disclosure provides a method for manufacturing a titanium based product, including: providing a titanium hydride ingot; pre-sintering the titanium hydride ingot to dehydrogenate the titanium hydride ingot according to a first temperature control mode, so as to form a titanium ingot; machining the titanium ingot to form a titanium semi-product having a desired shape; and post-sintering the titanium semi-product according to a second temperature control mode that is different from the first temperature control mode, so as to form the titanium based product.
  • the present disclosure provides a titanium based product manufactured by the aforesaid method.
  • the titanium based product has a Vickers hardness between 200 HV and 250 HV, a tensile strength between 600 MPa and 650 MPa, and a yield strength between 500 MPa and 550 MPa.
  • One of the advantages of the present disclosure is that the method of the present disclosure, which pre-sinters the titanium hydride ingot according to a first temperature control mode, then machines the titanium ingot formed, and subsequently post-sinters the titanium semi-product according to a second temperature control mode formed, can reduce the wear rate of the processing equipment, thereby reducing the cost.
  • FIG. 1 is a flowchart of a method for manufacturing a titanium based product of the present disclosure.
  • FIG. 2 is a schematic view illustrating a step S 1 of the method for manufacturing a titanium based product of the present disclosure.
  • FIG. 3 is a schematic view illustrating a step S 2 of the method for manufacturing a titanium based product of the present disclosure.
  • FIG. 4 is a schematic view illustrating a step S 3 of the method for manufacturing a titanium based product of the present disclosure.
  • FIGS. 5 and 6 are schematic views illustrating a step S 4 of the method for manufacturing a titanium based product of the present disclosure.
  • FIG. 7 is a schematic view illustrating a step S 5 of the method for manufacturing a titanium based product of the present disclosure.
  • FIG. 8 shows a first temperature control mode used in the step S 2 of the method for manufacturing a titanium based product of the present disclosure.
  • FIG. 9 shows a second temperature control mode used in the step S 4 of the method for manufacturing a titanium based product of the present disclosure.
  • Numbering terms such as “first”, “second” or “third” can be used to describe various components, signals or the like, which are for distinguishing one component/signal from another one only, and are not intended to, nor should be construed to impose any substantive limitations on the components, signals or the like.
  • the present disclosure provides a method for manufacturing a titanium based product including the following steps.
  • the first step i.e., step S 1
  • the next step i.e., step S 2
  • the next step i.e., step S 3
  • the next step i.e., step S 3
  • the last step i.e., step S 4
  • the titanium based product can be a casing or component of an electronic device, but is not limited thereto.
  • the titanium hydride ingot 102 can be formed from a titanium hydride powder 100 .
  • the titanium hydride powder 100 can have a predetermined particle size, and can be put into a specific mold and dry-pressed at a suitable pressure to form the titanium hydride ingot 102 with a specific shape and size.
  • a predetermined amount of other metal (e.g., aluminum and vanadium) or metal precursor powders can be mixed into the titanium hydride powder 100 .
  • the titanium hydride powder has an average particle size between 3 ⁇ m and 500 ⁇ m, and preferably between 100 ⁇ m and 300 ⁇ m. If the average particle size is less than 1 ⁇ m, the titanium hydride powder may spontaneously ignite. If the average particle size is greater than 400 ⁇ m, the titanium hydride powder is difficult to be densely pressed, so that the titanium hydride ingot 102 does not have a required density.
  • the titanium hydride powder can be made by the following steps. Firstly, a titanium sponge is hydrogenated under a vacuum condition and an atmosphere of a substantially pure hydrogen gas (purity >99.9%) to form a titanium hydride sponge.
  • the titanium sponge is preferably a zero-order titanium sponge that has a low oxygen-content.
  • the titanium hydride sponge is crushed by being ball-milled under a protective atmosphere, and the titanium hydride particles thus obtained are classified by particle size.
  • the titanium hydride ingot 102 is placed in a chamber of a sintering device and the chamber is maintained at a vacuum degree of about 2 ⁇ 10 ⁇ 4 torr by pumping. Subsequently, the titanium hydride ingot 102 is pre-sintered (i.e., sintered for the first time) according to a first temperature control mode. During this process, the titanium hydride ingot 102 is dehydrogenated to form a high-purity titanium ingot 104 . That is to say, a dehydrogenation reaction of the titanium hydride ingot 102 is carried out during this process. In other embodiments, the titanium hydride ingot 102 can be pre-sintered to form a sintered body, and the sintered body can proceed to be dehydrogenated under a vacuum condition.
  • the first temperature control mode is exemplified as gradually increasing a pre-sintering temperature up to 800-900° C. at a predetermined heating rate, then maintaining the pre-sintering temperature for 3 hours, and finally cooling the pre-sintering temperature to the room temperature.
  • the titanium ingot 104 formed in the step S 2 has a line shrinkage rate between 6% and 9% with respect to the titanium hydride ingot 102 , preferably 8.5%, a density between 3.5 g/cm 3 and 4.1 g/cm 3 , preferably 3.71 g/cm 3 , a porosity between 15% and 20%, preferably 17.5%, and a Vickers hardness between 90 HV and 110 HV, preferably 108 HV.
  • a machine tool such as a milling cutter can be used to change the shape and size of the titanium ingot 104 , so as to form a titanium semi-product 106 that corresponds in shape and size to the final product before the post-sintering begins.
  • the machine tool used in the step S 3 is merely an example and is not meant to limit the present disclosure.
  • the titanium ingot 104 has a relatively low hardness and density, so that the wear rate of the processing equipment can be reduced, thereby reducing costs.
  • the titanium semi-product 106 is placed in a chamber of the sintering device and the chamber is maintained at a vacuum degree of about 2 ⁇ 10 ⁇ 4 torr by pumping. Subsequently, the titanium semi-product 106 is pre-sintered (i.e., sintered for the second time) according to a second temperature control mode that is different from the first temperature control mode, so as to form a titanium based product 108 having a high purity, high density and low oxygen content.
  • a second temperature control mode that is different from the first temperature control mode
  • the second temperature control mode is exemplified as gradually increasing a post-sintering temperature up to 1200-1300° C. at a predetermined heating rate, then maintaining the post-sintering temperature for 3 hours, and finally cooling the pre-sintering temperature to the room temperature.
  • the titanium based product 108 formed in the step S 4 has a line shrinkage rate between 13% and 16% with respect to the titanium hydride ingot 102 , preferably 14.5%, a density of about 4.45 g/cm 3 , a porosity of about 0.4%, and a Vickers hardness between 200 HV and 250 HV, preferably 240 HV.
  • the titanium based product 108 obtained by the step S 4 would contain other metal components except for titanium.
  • the method of the present disclosure can further include a step (step S 5 ) of modifying an appearance of the titanium based product 108 .
  • step S 5 surface trimming, polishing, lead angle chamfering processes, and etc., can be performed on the titanium based product 108 to meet precision requirements in actual use.
  • the aforesaid processes are merely examples and are not meant to limit the present disclosure.
  • the method of the present disclosure can further include a step (step S 6 ) of precisely machining the modified titanium based product 108 .
  • the modified titanium based product 108 can be formed with through holes H, but is not limited thereto, so as to increase its structural complexity.
  • One of the advantages of the present disclosure is that the method of the present disclosure, which pre-sinters the titanium hydride ingot according to a first temperature control mode, then machines the titanium ingot formed, and subsequently post-sinters the titanium semi-product according to a second temperature control mode formed, can reduce the wear rate of the processing equipment, thereby reducing costs.
  • the process time can be reduced and the processing precision and structural complexity of the titanium based product can be increased.
  • the titanium based product of the present disclosure compared with the conventional titanium substrate, has more excellent mechanical properties.
  • the comparison between the titanium based product of the present disclosure and the commercial titanium substrates is shown in Table 1.
  • Titanium based Ti Ti MIM Ti product Gr.3 Gr.4 BASF Vickers hardness (HV) 240 150 165 160-240 Density (g/cm 3 ) 4.45 4.51 4.51 >4.2 tensile strength (MPa) 641 380 550 550 yield strength (MPa) 511 450 480 480 ductility (%) 11 18 15 >5 elastic modulus (GPa) 105 105 105 105 105
  • the titanium based product of the present disclosure compared with the commercial titanium substrate, has an improved hardness, tensile strength, and yield strength.
  • the tensile strength of the titanium based product is between 600 MPa and 650 MPa and the yield strength of the titanium based product is between 500 MPa and 550 MPa.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Powder Metallurgy (AREA)
US16/218,620 2018-08-24 2018-12-13 Titanium based product and method for manufacturing the same Abandoned US20200061712A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TW107129622A TWI658884B (zh) 2018-08-24 2018-08-24 鈦基工件及其製造方法
TW107129622 2018-08-24

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CN (1) CN110856870A (zh)
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Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO822739L (no) * 1981-08-31 1983-03-01 Battelle Memorial Institute Sintringssammensetning paa titanboridbasis og anvendelse derav for fremstilling av sintrede gjenstander
US9777347B2 (en) * 2007-06-11 2017-10-03 Advance Material Products, Inc. Manufacture of near-net shape titanium alloy articles from metal powders by sintering with presence of atomic hydrogen
CN100567530C (zh) * 2008-04-11 2009-12-09 中南大学 一种高性能粉末冶金Mo-Ti-Zr钼合金的制备方法
JP5428546B2 (ja) * 2009-06-04 2014-02-26 三菱マテリアル株式会社 アルミニウム多孔質焼結体を有するアルミニウム複合体の製造方法
CN102534284B (zh) * 2011-12-12 2013-04-17 南昌航空大学 微波烧结制备医用多孔NiTi形状记忆合金的方法
CN105734316B (zh) * 2016-03-07 2018-03-06 上海交通大学 一种利用氢化钛粉末直接制备成型钛基复合材料的方法
CN106191493B (zh) * 2016-07-15 2018-01-12 湖南大学 一种粉末冶金钛合金的制备方法
CN106923940B (zh) * 2017-03-28 2019-04-23 中奥汇成科技股份有限公司 多孔钛椎间融合器的制备方法及多孔钛椎间融合器
CN107760897A (zh) * 2017-10-30 2018-03-06 东北大学 以氢化海绵钛为原材料制造钛与钛合金及其零部件的方法

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CN110856870A (zh) 2020-03-03
TWI658884B (zh) 2019-05-11

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