发明授权
- 专利标题： In-situ generation of heat treating atmospheres using a mixture of non-cryogenically produced nitrogen and a hydrocarbon gas
- 专利标题（中）： 使用非低温法生产的氮气和烃气体的混合物原位产生热处理气氛
-
申请号： US966967申请日： 1992-10-26
-
公开(公告)号： US5342455A公开(公告)日： 1994-08-30
- 发明人: Brian B. Bonner , Diwakar Garg , Donald P. Eichelberger , Donald J. Bowe
- 申请人： Brian B. Bonner , Diwakar Garg , Donald P. Eichelberger , Donald J. Bowe
- 申请人地址： PA Allentown
- 专利权人： Air Products and Chemicals, Inc.
- 当前专利权人： Air Products and Chemicals, Inc.
- 当前专利权人地址： PA Allentown
- 主分类号： B22F3/00
- IPC分类号： B22F3/00 ; B22F3/10 ; B23K35/38 ; C21D1/26 ; C21D1/76 ; C22F1/02 ; C22F1/14 ; C23C8/18 ; C21D1/00
摘要：
A process for generating in-situ low-cost atmospheres suitable for annealing and heat treating ferrous and non-ferrous metals and alloys, brazing metals, sealing glass to metals, and sintering metal and ceramic powders in a continuous furnace from non-cryogenically produced nitrogen containing up to 5% residual oxygen is presented. The disclosed process involves mixing nitrogen gas containing residual oxygen with a predetermined amount of a hydrocarbon gas, feeding the gaseous mixture through a nonconventional device into the hot zone of a continuous heat treating furnace, converting residual oxygen to an acceptable form such as a mixture of moisture and carbon dioxide, a mixture of moisture, hydrogen, carbon monoxide, and carbon dioxide, or a mixture of carbon monoxide, moisture, and hydrogen, and using the resultant gaseous mixture for annealing and heat treating metals and alloys, brazing metals, sintering metal and ceramic powders, and sealing glass to metals.