MIM manufacturing process for non-magnetic 17-4P stainless steel parts
A manufacturing process, stainless steel technology, applied in the field of MIM manufacturing process, MIM manufacturing process of non-magnetic 17-4PH stainless steel parts, can solve the problems of low density, poor corrosion resistance and strength, low strength and hardness, and achieve tensile strength. And the effect of high yield and good corrosion resistance
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[0017] Example 1: Manufacturing non-magnetic 17-4PH stainless steel injection powder:
[0018] (1) Put the 17-4PH stainless steel powder with a diameter of 7 microns and 8% of the total weight of the binder in a kneader, and mix at a temperature of 175°C for 40 minutes;
[0019] (2) The mixture prepared in step (1) is cooled to room temperature and then crushed with a crusher. The crushed material is extruded and granulated in the injection machine at 160°C, which is convenient for injection molding;
[0020] (3) Injection molding: the feed prepared in step (2) is processed into a blank in an injection molding machine at 160°C, injection pressure 60Mpa, and mold temperature 70°C;
[0021] (4) Place the blank processed in step (3) in a catalytic degreasing furnace at 110°C for catalytic debinding for 2 hours to remove the polyformaldehyde in the injection blank;
[0022] (5) Put the catalytically degreased blank in step (4) into a vacuum furnace for debinding and sintering. The sintering...
Example Embodiment
[0024] Example 2
[0025] (1) Put 17-4PH stainless steel powder with a diameter of 9 microns and 11% of the total weight of the binder in a kneader, and mix for 120 minutes at a temperature of 195°C;
[0026] (2) The mixture prepared in step (1) is cooled to room temperature and crushed with a crusher. The crushed material is extruded and granulated at 180°C in the injection machine, which is convenient for injection molding;
[0027] (3) Injection molding: the feed prepared in step (2) is processed into a blank in an injection molding machine at 180°C, an injection pressure of 100Mpa, and a mold temperature of 100°C;
[0028] (4) Put the blank processed in step (3) in a catalytic degreasing furnace for catalytic debinding at 110°C for 4 hours to remove the polyformaldehyde in the injection blank;
[0029] (5) Put the catalytically degreased blank in step (4) into a vacuum furnace for debinding and sintering. The sintering process is as follows: heating from room temperature to 700°C at...
Example Embodiment
[0031] Example 3
[0032] (1) Put the 17-4PH stainless steel powder with a diameter of 10 microns and a binder accounting for 11% of the total weight in a kneader, and mix for 120 minutes at a temperature range of 195°C;
[0033] (2). Cool the mixture prepared in step (1) to room temperature and crush it with a crusher. The crushed material is extruded and pelletized in an injection machine at 190°C, which is convenient for injection molding;
[0034] (3) Injection molding: the feed prepared in step (2) is processed into a blank in an injection molding machine at 210°C, an injection pressure of 140Mpa, and a mold temperature of 150°C;
[0035] (4) Put the blank processed in step (3) in a catalytic degreasing furnace at 140°C for catalytic debinding for 4 hours to remove the polyformaldehyde in the injection blank;
[0036] (5) Put the catalytically degreased blank in step (4) into a vacuum furnace for debinding and sintering. The sintering process is: heating from room temperature to 80...
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