抄録
Brazing is a method of permanently joining a wide range of materials and has a wide application in fabricating components of commercial value. It is distinguished from welding in that the process takes at temperatures below the melting points of the materials to be joined and from soldering in that the temperature of processing is above 450℃. This method is commonly used in electronics or refrigerating machines due to its advantage of diminution of heat influence and easy manufacturing. Unfortunately, the brazing method for copper alloy used in household air conditioners has some demerits in that the copper alloy is susceptible to heat and the resulting joints may have various flaws. Therefore, deciding on the optimal joint conditions is an effective method to use based on the experimental data. However, using a trial-and-error method from the beginning in such a wide area in order to decide on the optimal conditions requires too much experience to overcome these problems and to decide on the optimal conditions for a procedure using response surface methodology. A response surface methodology, consisting of experimental design, statistical modeling and optimization is used to decide on the optimal joint parameter with process conditions.
