Preparation method of stainless steel material
A technology of stainless steel and stainless steel powder, applied in the field of powder metallurgy, can solve the problems of affecting the gloss effect of product appearance, difficult to replace in large quantities by powder metallurgy, and no advantages in mass production, etc., and achieve uniform distribution of nitrogen, high density, and polishing. good performance
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[0037] According to an embodiment of the present disclosure, a method for preparing a stainless steel material is provided. Such as figure 1 Shown, this preparation method comprises:
[0038] S1. Preparing the billet: inject the feed material prepared by stainless steel powder and binder on the injection machine into a billet of predetermined shape.
[0039] For example, the mass percentage of each component of stainless steel powder is: C≤0.3, Ni≤0.2, Cr: 16.0~18.0, Mo: 2.0~4.0, Si≤1.0, Mn: 10.0~13.0, the balance is Fe and unavoidable ingredients. The above components are capable of forming a high nitrogen nickel-free stainless steel material. For another example, the stainless steel powder may also include at least one of 300 series stainless steel, 400 series stainless steel, duplex stainless steel, 17-4 stainless steel and the like.
[0040] Binders can be used to shape stainless steel powders. For example, the adhesive includes wax-based adhesives, oil-based adhesive...
Embodiment 1
[0066] S01. Preparing a billet: mixing and granulating the stainless steel powder and a binder; then, forming a billet of a predetermined shape by means of mold injection molding on an injection machine. Among them, the stainless steel powder is 316 stainless steel powder. In the mold injection molding process, the process parameters include: the nozzle temperature is controlled at 180°C, the injection pressure is controlled at 80Mpa, and the mold temperature is controlled at 100°C.
[0067] S02. Degreasing: place the billet in a catalytic degreasing furnace, and perform catalytic degreasing on the billet to remove organic matter such as binders. Among them, the degreasing rate was 7.6%. After the catalytic degreasing is completed, the blank is taken out from the catalytic degreasing furnace. Among them, the catalytic degreasing process is as follows: under the condition of feeding acid gas, the temperature of the catalytic degreasing furnace is raised to 120°C at a rate of ...
Embodiment 2
[0086] S01. Preparing a blank: kneading and granulating the stainless steel powder and a binder; then, forming a blank of a predetermined shape on the injection by means of mold injection molding. Among them, the stainless steel powder is high-nitrogen nickel-free stainless steel powder, and the mass percentage of each component of the stainless steel body is: C≤0.3, Ni≤0,2, Cr: 16.0~18.0, Mo: 2.0~4.0 ,Si≤1.0, Mn: 10.0~13.0, the balance is Fe and unavoidable components.
[0087] S02. Degreasing: place the billet in a catalytic degreasing furnace, and perform catalytic degreasing on the billet to remove organic matter such as binders. Among them, the degreasing rate was 7.6%. After the catalytic degreasing is completed, the blank is taken out from the catalytic degreasing furnace. Among them, the catalytic degreasing process is as follows: under the condition of feeding acid gas, the temperature of the catalytic degreasing furnace is raised to 120°C at a rate of 3°C / min, the ...
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