Excuse me, I now want to weld a hard alloy car knife need which material, beg the concrete method
Apply the pole to the grinding wheel, the metal luster, ground level, easy welding. First heated the cutter bar, 700 degrees (just a dark red) and a few borax, continue to heat and copper wire, copper wire at this time of melt, evenly spread out on the welding of the copper, not too thick, laying copper flat, otherwise the cutting head is bad. Leave the torch and sprinkle a little bit of borax. Use tweezers put good, the alloy tool bit heating cutter and cutter bar juncture place, this place is on the tool holder, (part) is not on the tip of this is for the sake of tool holder and tool bit heated at the same time, when the tool holder and tool bit reaches 800 degrees Fahrenheit, put the copper electrode, then copper electrode melt into the cutting head and the crevice tool rod, heat the torch around the cutting head shaking more, until the cutting head and the cutter bar to isothermal, cutting head completely floating on the cutter bar, welding is complete. Do not move at this time of tool holder, cutting head is out, wait about 15 seconds, copper sludge, the cutter and cutter bar in a heat insulation barrels containing vermiculite, slow cooling after about 4 hours, the temperature of the cooling to be able to use.
Oxygen acetylene and welder, borax, brass electrode, and gas welding glasses. If there are conditions, the use of liquefied petroleum gas and liquefied gas welding torch, because of the high liquid gas containing hydrogen, welding is not easy oxidation, black, and low flame temperature, alloy tool bit soft and uniform temperature rise, it is not easy to crack.
You need to use the alloy electrode and 唖 welding tool Objects will first heated to red state (temperature of about 800 ~ 1000 degrees) and electrode with borax as flux (add) in accordance with the necessary then cemented carbide and tungsten steel lathe tool welding on the tool holder to complete a turning lathe turning tool rack can be attached cutting machine processing work
It is simple to use copper welding to pay attention to the relationship between the weight of the heating and the temperature and the heating time
The key to welding is isothermal, if the knife is very hot and the pole is very cold, it can not be soldered at all, so the heating should be focused on the pole. And it's absolutely not cold, and if you put it in the water, it's going to be broken. Also, the head of the knife should not be burnt to the white, the impact and wearability of the head will be very poor. If you don't have experience when you heat up, always remove your glasses to confirm the temperature and try to remember the color of the temperature when you put on your glasses. I wish I had done it long.
