Determination of the Local Phase Diagram in WC-(Ni-Fe)Pseudo-Binary System
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摘要: 用光學顯微鏡、電子顯微鏡、圖像儀、X射線衍射相分析、熱差分析等綜合方法,研究了WC-(Ni-Fe)系合金,在WC含量(質量分數為6%~38%)范圍內的偽二元系相圖特征.同時研究了WC在γ相中的最高溶解度和室溫溶解度數據.結果表明,WC-(Ni-Fe)偽二元系相圖仍屬于典型的二元共晶型相圖,γ相中的溶解度隨溫度而變化,共晶溫度下最大溶解度(質量分數)為11.2%,室溫時最大溶解度為9.01%.Abstract: The characteristics of local phase diagram in WC-(Ni-Fe)pseudo binary system were studied by means of optical microscope,SEM,X-ray diffraction and thermal-analysis.The maximum solubility and the solubility at room temperature of WC in γ phase were also measured.The results show that WC-(Ni-Fe)pseudo binary system is still a typical WC-(Ni-Fe)eutectic phase diagram.The eutectic temperature is 1419℃.The solubility of WC in γ phase varies with temperature.The maximum solubility at eutectic temperature is 11.2% and the solubility at room temperature is 9.01%.
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Key words:
- hard alloy /
- phase diagram /
- pseudo-binary system /
- solubility
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