摘要
采用氩气保护下的活性金属钎焊法对碳化硅晶须增韧氧化铝陶瓷 (Al2 O3 /SiCW)与不锈钢 (1Cr18Ni9Ti)进行了钎焊。通过对钎料润湿性的研究确定钎焊试验的温度和时间范围 ;通过剪切试验研究了钎焊工艺参数对接头强度的影响。试验结果表明 ,升高温度和增加时间均会提高钎料对陶瓷的润湿性 ,且温度超过 95 0℃后或时间超过 15min后 ,润湿角下降不明显。在氩气保护下 ,用Ag -Cu -Ti3钎料对陶瓷与不锈钢进行钎焊可以获得比较好的效果。钎焊工艺参数对接头强度影响很大 ,在钎焊温度为 90 0℃、钎焊时间为 15min时 ,钎焊接头的强度平均可达到
SiC whisker reinforced Al 2O 3 ceramic (Al 2O 3/SiC W) brazed to stainless steel (1Cr18Ni9Ti) with active metal brazing in argon gas. The temperature and time range of brazing through the wetting experiment were confirmed, and the effect of brazing conditions on the joint strength through the shear experiment was discussed. It was shown that the wettability of ceramic was improved with increasing temperature and time. When the temperature was above 950 ℃ and the time exceeded 15 minutes, the drop of wetting angle was not apparent. The better properties were achieved when brazing Al 2O 3/SiC W ceramic to stainless steel in argon gas was with Ag-Cu-Ti3 brazing filler metal. The effect of brazing conditions on joint strength was great. When brazing at 15 minutes and 900 ℃, the joint can provide the average shear strength of 72 MPa.$$$$
出处
《焊接》
2002年第3期37-39,共3页
Welding & Joining
