• 作者： 黃振賢; 呂璞石; 陳永傳
• 作者服務機構： 國立台灣大學機械工程學系
• 中文摘要： 為了瞭解經過各種純化處理的國產瓶裝 N ，Ar，H 等氣體對鋼料的高溫物理化學反應，將鋼料置於上述諸氣體中或其混合氣體中加熱，而觀察加熱後試片的表面狀況，顯微鏡組織，估算其含碳量，並由其結果探討利用瓶裝 N ，Ar，H 等氣體製造輝面熱處理用控制爐氣的可行性。所得結果如下： (1)瓶裝N 和Ar經過(i)Mg粉純化(ii)通過950°C木炭 (iii)Mg粉純化後再通過950°C木炭等三種純化處理後，可避免對鋼料的氧化作用，但仍有脫碳作用。 (2)經過純化處理的瓶裝N 和Ar，對鋼料的脫碳性無顯著差異。 (3)瓶裝H 通過高溫木炭時，木炭的溫度愈高，所得到的H ＋CH 混合氣體之碳勢愈高，但木炭溫度在900°C以上，碳勢未有顯著改變。 (4)H 十CH 混合氣體中添加純化後的N 或Ar時，N 或Ar的量愈多，混合氣體的碳勢愈低。 (5)在1×10 torr的H +CH 混合氣體中加熱鋼料時，可避免鋼料的氧化，脫碳及滲碳。
• 英文摘要： To realize the high temperature physico-chemical reactions between steel and purifiedcommercial grade gases such as N , Ar orH , steel samples were heated at elevatedtemperatures in these gases. After heatingfor a period of time, the surface condition,microstructure and weight change of sampleswere studied. The results indicated： （1）The oxidation of steel could be avoidedn the purified commercial grade N and Argases obtained by passing them through (i)magnesium powder, (ii) charcoal at 950°C,(iii) magnesium powder and 950°C charcoal. (2) The carbon potential of purified N was identical to that of purified Ar. (3) After the passing of H throughcharcoal, the carbon potential of H ＋CHgas mixture so obtained increased with theincreasing temperature of charcoal, Thecarbon potential was nearly constant at tem-peratures above 900°C for charcoal. (4) As purified N or Ar was added tothe gas mixturd of H ＋CH, the carbonpotential of the gas mixture decreased withthe increasing amount of the gas added. (5) The oxidation, decarburization andcarburization could be avoided during heatingof the steel under the atmosphere of H ＋CHat the pressure of 1 x 10 torr.
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