A hot shaping method for powder metallurgy products with high yield strength
A technology of powder metallurgy and high yield, which is applied in the field of thermal shaping of powder metallurgy products with high yield strength, to achieve the effect of saving shaping costs and improving the yield rate
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Embodiment 1
[0028] Embodiment 1 Thermal shaping method of 17-4PH stainless steel deformed finished product
[0029] The yield strength of 17-4PH stainless steel prepared by metal powder injection molding is about 730MPa, and it is not feasible to correct the deformed products by general powder metallurgy cold shaping method. To address this problem, this embodiment provides the following shaping methods:
[0030] This method has used special plastic mold, and described plastic mold comprises following structure:
[0031] Plastic mold upper mold (1), plastic mold lower mold (2), locking device (4); said plastic mold lower mold (2) is provided with deformed product placement cavity (3); said plastic mold upper mold (1) is provided with bumps; the locking device (4) is a screw; when in use, the deformed product is placed in the deformed product placement cavity (3), and in the mold closing process, the convexity of the upper mold (1) of the plastic mold The block compresses the deformed pr...
Embodiment 2
[0037] Embodiment 2 Thermal shaping method of 17-4PH stainless steel deformed finished product
[0038] The yield strength of 17-4PH stainless steel prepared by metal powder injection molding is about 730MPa, and it is not feasible to correct the deformed products by general powder metallurgy cold shaping method. To address this problem, this embodiment provides the following shaping methods:
[0039] This method has used special plastic mold, and described plastic mold comprises following structure:
[0040] Plastic mold upper mold (1), plastic mold lower mold (2), locking device (4); said plastic mold lower mold (2) is provided with deformed product placement cavity (3); said plastic mold upper mold (1) is provided with bumps; the locking device (4) is a screw; when in use, the deformed product is placed in the deformed product placement cavity (3), and in the mold closing process, the convexity of the upper mold (1) of the plastic mold The block compresses the deformed pr...
Embodiment 3
[0046] Embodiment 3 Thermal shaping method of 17-4PH stainless steel deformed finished product
[0047] The metal powder injection molding method of 17-4PH stainless steel is as follows:
[0048] S21. Feed material preparation: Mix 17-4PH stainless steel powder with a particle size of 500 mesh and a polymer binder evenly, heat to 200°C, and stir to obtain a paste mixture; move the paste mixture to a twin-screw extrusion machine Extrude and granulate in the granulator to prepare granular feed;
[0049] S22. Injection molding: Add the granular feed into the hopper of the injection molding machine, and control the injection molding machine to work according to the following parameters to form the green part: mold temperature: 100-120°C; feeding temperature: 180-220°C ℃; injection pressure: 120 ~ 180MPa;
[0050] S23. Debinding and sintering: Put the green body into the integrated debinding and sintering furnace, raise the temperature to 600℃ at a rate of 0.5℃ / min, heat and volati...
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Abstract
Description
Claims
Application Information
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