Rapid replacement and repair method for electric furnace resistance wire

Abstract

The invention relates to the field of welding materials and processes, and particularly relates to a rapid replacement and repair method for an electric furnace resistance wire. The method specifically comprises the steps that (1) a welding material with the components similar to those of the resistance wire is adopted, and a welding wire is composed of, by weight, 0.01%-0.04% of C, 1.00%-5.00% ofMn, 0.10%-0.50% of Si, 5.00%-10.00% of Cr, 3.00%-5.00% of Mo, 4.10%-6.90% of Fe, 1.50%-3.00% of Nb and the balance Ni and inevitable impurities; (2) the welding wire at the joint is in a straight state; and (3) a special argon arc welding process is adopted. A heat treatment furnace repaired through the method can reach the expected temperature rise speed which can reach 5 DEG C / S, the temperature can reach 1150-1200 DEG C to the maximum extent, the temperature fluctuation is smaller than or equal to + / -5 DEG C, temperature rise and fall control required by the special heat treatment processcan be achieved, and the functions of the heat treatment furnace are basically achieved.

Description

technical field [0001] The invention relates to the field of welding materials and techniques, in particular to a method for quickly replacing and repairing electric furnace resistance wires. Background technique [0002] The heat treatment furnace refers to the electric furnace or fuel furnace used for heat treatment and heating of the charge. Commonly used heat treatment furnaces include box-type resistance furnaces, well-type resistance furnaces, gas carburizing furnaces, and salt bath furnaces. Large-scale trolley-type resistance furnace, because it is a high-temperature resistance furnace, the maximum heating temperature reaches 1200°C, and the furnace is large in size, with a length, width and height of 1200mm×800mm×1000mm. It is often used for heat treatment of large-sized materials, so this heat treatment furnace Long-term high-temperature and load-bearing state, due to the heavy heat treatment work, the heat treatment furnace has a high temperature out of the furnac...

AI Technical Summary

Problems solved by technology

As a result, the temperature rises slowly in some areas in the furnace cavity, and the temperature control and heat preservation effects are not good. Eventually, the test piece stays in the furnace for too long, and the established heat treatment process system cannot be realized.

If it needs to be repaired, all the resistance wires can only be replaced by a professional manufacturer. Not only the maintenance workload is heavy, the maintenance cycle is long, and the maintenance cost is high