99热这里只有精品免费_免费国产一级 片内射老妇_国产AV尤物网站蜜芽麻豆_黄色av大片免费观看_夜夜躁日日躁狠狠躁婷婷_亚洲av男人网正址在线观看_中文乱人伦视频在线播放_九九视频只有精品_亚洲欧美综合激情小说}_国产一级性片

鈷基合金有極好的耐熱、耐腐蝕和抗高溫氧化性。鈷基合金粉是在Co-Cr-W（Mo）合金基礎上添加適量的B. Si元素而創制的。B. Si元素的加入使Co-Cr-W(Mo)合金具有了自熔性合金的特點，合金熔點明顯降低，脫氧造渣性能好。適度加入部分Ni，在600-800℃溫度范圍內可耐高溫,抗氧化,硬性更好.耐磨、耐腐蝕性能良好。抗含硫燃氣腐蝕。

?Cobalt base alloy has exceent heat resistance. Corrosion resistance and oxidation resistance. Cobalt-based alloy powders is in Co-Cr-W (Mo) based on tae alloy add right amount B. Si elements and initiative. B.Si elements? join to make? Co-Cr-W (Mo) alloy has the characteristics of the self fluxed alloy. The significantly lower melting point alloy. Deoxidizing slay ma king good performance. Moderate to join part Ni. In the temperature range 600-800℃ high temperature resistant. The oxidation resistance. Red hardness wear-resisting corrosion resistance. Sour gas corrosion resistance is better.