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Abstract：
The press and sinter method remains the standard among powder metallurgy processes for powdered stainless-steel materials. It delivers low cost, low oxidation rate, and adequate corrosion resistance. Furthermore, 17-4PH is a martensitic stainless-steel that is commonly used for high-strength and medium-ductility stainless steel parts. However, a few studies have investigated the press and sinter method for producing 17-4PH parts. This shortage is due to the high hardness (low compressibility) of 17-4PH powder. Thus, the main objective of this study is to evaluate the press and sinter method in terms of the manufacturing process, the influencing factors, and the theoretical basis of press and sinter methods in conjunction with metal injection molding technology for the production of 17-4PH parts. First, the literature and monographs are examined and summarized to cover the previous results, research progress, development trends, and applications of press and sinter method 17-4PH parts. Following the theoretical analysis, the practical investigation was conducted by producing parts with cold pressing from 800 to 1600 MPa, followed by sintering: the sintering temperature was 1200 °C for one hour under a protective vacuum atmosphere. ImageJ analysis was performed to measure the sinter density. The results showed an increase in relative sinter density from 84.43% to 96.43% for 800 and 1600 MPa, respectively, while the earlier results reached 93.47%. Overall, the press and sinter method enables the production of high-hardness 17-4PH parts with a high density, without using additives like lubricants, wax, or alloying elements.
摘要：
压制和烧结方法仍然是粉末状不锈钢材料的粉末冶金工艺中的标准。它提供低成本，低氧化率，和足够的耐腐蚀性。此外，17-4PH是一种马氏体不锈钢，通常用于高强度和中等延展性的不锈钢零件。然而,一些研究已经研究了生产17-4PH零件的压制和烧结方法。这种短缺是由于17-4PH粉末的高硬度(低可压缩性)。因此，这项研究的主要目的是评估冲压和烧结方法的制造过程，影响因素，并结合金属注射成型技术生产17-4PH零件的压制烧结方法的理论基础。首先,对文献和专著进行检查和总结，以涵盖先前的结果，研究进展,发展趋势,17-4PH零件的压制和烧结方法的应用。经过理论分析,通过从800到1600MPa的冷压生产零件进行了实际研究，随后进行烧结:烧结温度为1200°C,在保护性真空气氛下持续1小时。进行ImageJ分析以测量烧结物密度。结果表明，在800和1600MPa下，相对烧结矿密度从84.43％增加到96.43％，分别,而早期结果达到93.47%。总的来说,压制和烧结方法可以生产具有高密度的高硬度17-4PH零件，不使用润滑剂等添加剂，蜡，或合金元素。
