Binder for injection molding of titanium alloy powder and method for injection molding titanium alloy parts
An injection molding, titanium alloy technology, applied in the direction of adhesives, wax adhesives, adhesive additives, etc., can solve the problems of bubble flash, easy deformation, etc., and achieve the effect of good shape retention, increased strength, and easy removal
Inactive Publication Date: 2018-08-24
AEROSPACE HIWING HARBIN TITANIUM IND
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Problems solved by technology
[0004] The present invention solves defects such as easy deformation in the degreasing process of the existing injection-molded titanium alloy parts, bubbles and flashes in the injection and degreasing process; and provides a binder for titanium alloy powder injection molding and an injection-molded titanium alloy part Methods
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specific Embodiment approach 1
[0029] Specific embodiment one: The binder in this embodiment is made up of separately packaged component A and component B, and component A is made up of polypropylene and low-density polyethylene, and component B is made up of paraffin, stearic acid and Naphthalene composition; each component is calculated by mass percentage: 20% low density polyethylene, 22% polypropylene, 53% paraffin, 3% stearic acid, 2% naphthalene.
[0030] The method for the injection molding titanium alloy part is carried out according to the following steps:
[0031] Step 1, Ti6Al4V titanium alloy spherical powder (titanium alloy powder particle size d 50 ≈20μm) into the mixer for heat preservation and preheating. The temperature of heat preservation and preheating is 180°C, the speed of rotation is 20r / min, and the heat preservation time is 10min. Add it to the mixer, after adding component A for the first time, then add it every 10 minutes;
[0032] Step 2. Then lower the temperature by 50°C and ...
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Abstract
The invention discloses a binder for titanium alloy powder injection molding and a method for injection molding of titanium alloy parts, belongs to the technical field of titanium alloy part machining and aims at overcoming the defect that existing injection-molded titanium alloy parts easily deform in the degreasing process and air bubbles, trimming and the like exist in the injection and degreasing process. The binder is prepared from a component A and a component B which are independently packaged, wherein the component A is prepared from polypropylene and low-density polyethylene, and the component B is prepared from paraffin wax, stearic acid and naphthalene. The method comprises the steps that 1, Ti6Al4V titanium alloy spherical powder is put in a mixing machine for thermal insulation and preheating, and the component A is added to the mixing machine under the thermal insulation condition at time intervals in a three-batch and equal-amount mode; 2, the temperature is reduced by 50 DEG C and then heat preservation is performed, the component B is added to the mixing machine at time intervals in a three-batch and equal-amount mode, mixing is performed after rotation speed is adjusted, then the temperature is reduced, extrusion and granulation are performed when a toothpaste shape is formed, and then injection molding, degreasing and vacuum sintering are sequentially performed to obtain the titanium alloy parts. The binder and the method are used for the preparation of the titanium alloy parts.
Description
technical field [0001] The invention belongs to the technical field of processing titanium alloy parts; in particular, it relates to a binder for titanium alloy powder injection molding and a method for injection molding titanium alloy parts. Background technique [0002] Titanium and titanium alloys are new materials with excellent performance and have the reputation of "modern metal". At the same time, because titanium alloys have a series of advantages such as low density, high specific strength, and non-magnetic, they have always been recognized as difficult-to-process materials in the manufacturing industry. . As an advanced powder metallurgy process, the powder injection molding of titanium alloy can realize the near-net shape of complex structural parts and has attracted much attention in the industry. This forming method combines the advantages of powder metallurgy technology and injection molding technology, breaks through the constraints of traditional molding tec...
Claims
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IPC IPC(8): C09J191/06C09J123/06C09J123/12C09J11/06B22F3/22
CPCB22F3/225B22F3/227C08L2205/02C08L2205/03C08L2207/066C09J11/06C09J191/06C08L23/06C08L23/12C08K5/09
Inventor 刘振军田操张礼斌陈卓肖波
Owner AEROSPACE HIWING HARBIN TITANIUM IND