本研究的目的是利用粉末冶金的技術來得到高密度的零件，藉此提升產品在市場上的競爭力，原料使用不同配比的還原羰基鐵粉(CIP)與鐵鉻母合金粉(420MA)，比較各種成分得到的材料性質，首先將兩種粉末球磨混合後，接著做造粒，再將造粒後之粉末做單軸模壓成形，再以1270℃~1330℃之溫度區間做真空燒結，最後再對燒結完成之試片進行真空淬火、氣體滲碳與氣體滲硫氮化等熱處理。
實驗結果顯示，對各種不同成分試片進行氣體滲硫氮化熱處理均能有效改善表面硬度，但對於氣體滲碳熱處理而言，只對碳含量(0.19%)與鉻含量(14.9%)比例最低的試片有表面硬化的效果，是由於鉻含量太高則無法藉由氣體滲碳的方式來達到表面硬化之效果。
根據極化腐蝕試驗的之結果，發現經真空淬火後之試片，隨者鉻含量上升，試片之耐蝕性也隨之增加。

The purpose of this research is to use the powder metallurgy (PM) process to get high density parts, in order to increase the competitiveness of products in the market. Various compositions were compared, using different ratios of reduced carbonyl Iron powder (CIP) to 420 master alloy powder (420MA), which were first mixed and then granulated. The powder granules were uni-axially die-pressed, then sintered in vacuum at temperatures ranging from 1270℃ to 1330℃. Sintered specimens were then heat-treated by three different approaches, including vacuum quenching, gas carburizing and gas sulphonitriding.
The results show that gas sulphonitriding heat treatment is effective in improving the surface hardness for all specimens, but gas carburizing is only effective for the specimens of lowest proportion Carbon (0.19%) and Chromium (14.9%) content. It was found that gas carburizing would lose its effect of surface hardening if chromium content be too high.
According to corrosion test, it was found that vacuum quenching and increased chromium content increase the corrosion resistance.

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