"Brazing is a process for joining similar or dissimilar metals using a filler metal that typically includes a base of copper combined with silver, nickel, zinc or phosphorus. Brazing covers a temperature range of 900ºF - 2200ºF (470ºC - 1190ºC). Brazing differs from welding in that brazing does not melt the base metals, therefore brazing temperatures are lower than the melting points of the base metals. For the same reason, brazing is a superior choice in joining dissimilar metals. Brazed joints are strong. A properly-made joint (like a welded joint) will in many cases be as strong or stronger than the based metals being joined. "
I copied that from brazing.com Its pretty easy too and it does work well the map torch alone might not be hot enough. You can buy at homedepot etc.. a map gas/propane and oxygen torch they work really well. Just be sure you have everything ready and in place before you start them those little oxygen bottles run out quick and there like 10$ each up here.
http://www.canadiantire.ca/browse/product_detail.jsp?FOLDER%3C%3Efolder_id=1408474396672982&bmUID=1221929993695&PRODUCT%3C%3Eprd_id=845524443256940&assortment=primary&fromSearch=true
This is the setup you need or similiar look around at garage sales for them I have picked myne for 3$. Works great you can even weld steel with it. dont get a mini kit like this with a cutting ability this is just too small the brazing/welding tip works pretty good tho. I guess the ideal thing to do would be get a real full oxy/accetelyne setup.