Alloy powder injection molding feedstock and preparation method thereof
An injection molding, alloy powder technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of insufficient corrosion resistance, scratch resistance, poor appearance, insufficient hardness, etc., to optimize and improve the manufacturing cost. Corrosion ability and oxidation, strength-enhancing effect
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preparation example Construction
[0037] In another embodiment, a preparation method of the alloy powder injection molding feed comprises the following steps:
[0038] Step S1. Add the metal powder of the foregoing embodiment into an internal mixer for stirring and heating;
[0039] Step S2. Add the binder according to the ratio of the previous embodiment, and carry out mixing;
[0040] Step S3. Extrusion granulation.
[0041] In a preferred embodiment, in step S1, the metal powder is heated to 180-200°C.
[0042] In a preferred embodiment, in step S2, the rotational speed of the internal mixer is set at 10-30 rpm, the mixing temperature is set at 175-195° C., and the stirring is performed for 60-120 min.
[0043] In another embodiment, a method of using the metal powder injection molding feedstock to make a product comprises the following steps:
[0044] Step S1. adding the metal powder into an internal mixer for stirring and heating;
[0045] Step S2. Mixing the binder added according to the proportion; ...
example 1
[0054] Weigh 1000 mesh 9.3kg of metal powder: Cr (19%), Ni (5%), Mo (3.5%), Mn (1.5%), Si (0.1%), Co (30%), Fe (40.9%) ).
[0055] First melt and atomize the alloy of the above ingredients to make alloy powder, put it into the internal mixer for stirring and heating, heat to 190°C, add binder components: 35g of liquid paraffin, 35g of stearic acid, 70g of naphthalene, solid Paraffin wax 105g, microcrystalline wax 140g, carnauba wax 70g, polyethylene 140g, polypropylene 105g.
[0056] Then press down the pressure head of the internal mixer, set the mixing temperature to 180° C., and the rotor speed to 15 rpm. After continuing to stir for 90 minutes, take out the uniformly mixed feed, and make feed for injection molding through a twin-screw granulator.
[0057]The alloy powder feed is injected into a green part sample with a thickness of 2mm by a molding machine. Put it directly into a powder metallurgy vacuum sintering furnace, and control the temperature in the furnace from ...
example 2
[0059] Weigh 1000 mesh 9.1kg of metal powder: Cr (20%), Ni (6%), Mo (4%), Mn (2%), Si (0.3%), Co (32%), Fe (35.7%) ).
[0060] First melt and atomize the alloy of the above ingredients to make alloy powder, put it into the internal mixer for stirring and heating, heat to 190°C, add binder components: 45g of liquid paraffin, 45g of stearic acid, 90g of naphthalene, solid Paraffin wax 135g, microcrystalline wax 180g, carnauba wax 90g, polyethylene 180g, polypropylene 135g.
[0061] Then press down the pressure head of the internal mixer, set the mixing temperature to 180° C., and the rotor speed to 15 rpm. After continuing to stir for 90 minutes, take out the uniformly mixed feed, and make feed for injection molding through a twin-screw granulator.
[0062] The alloy powder feed is injected into a green part sample with a thickness of 2mm by a molding machine. Put it directly into a powder metallurgy vacuum sintering furnace, and control the temperature in the furnace from roo...
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