Effects of aging treatment on the precipitation behavior of ε-Cu phase and mechanical properties of metal injection molding 17-4PH stainless steel

Chen Yuan Chung, Yu Chih Tzeng

研究成果: 雜誌貢獻期刊論文同行評審

20 引文 斯高帕斯(Scopus)

摘要

This study mainly investigates the influence of artificial aging at 480 °C, 520 °C and 620 °C on the microstructure and mechanical properties of metal injection molding (MIM) 17-4PH. The results show the microstructure of the as-sintered MIM 17-4PH to be mainly composed of lath martensite, δ-ferrite, and nodular SiO2 inclusions. The effect of precipitation hardening is to strengthen the MIM 17-4PH by the precipitation of a large number of fine spherical ε-Cu phases on the lath martensite matrix, which effectively block the movement of dislocations. The highest hardness is obtained by artificial aging at 480 °C for 4 h. As the aging temperature increases, the ε-Cu phase grows coarser, which results in over aging of the MIM 17-4PH and decreases the hardness.

原文???core.languages.en_GB???
頁(從 - 到)228-231
頁數4
期刊Materials Letters
237
DOIs
出版狀態已出版 - 15 2月 2019

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