Attention to the repair of electric heating elements in a well type electric resistance furnace:
1 replacement of the electric heating element materials, specifications, size, shape should be the same as the same as the original electric heating elements;
2 more than 1000 degrees of C high temperature furnace used in furnace temperature holding welding with DC arc welding, acetylene oxygen welding with low temperature furnace (neutral flame);
Acetylene welding with 3 Ni Cr alloy (neutral flame);
4 well type resistance furnace electrode selection Deng with R407 or R507. The same electric heating wire is used for welding of oxygen acetylene welding;
5 before welding with 600 to 700 degree C preheating. After welding, the best in the 600 - 700 degrees to C stress.