The stability of the brazing furnace conveyor belt directly affects the brazing progress and product quality. However, in actual operation, the conveyor belt often experiences hydrogen embrittlement fracture, tearing, and holes, seriously affecting product delivery schedules. What are the causes of these damages? If damage to the conveyor belt has already been detected, how can it be remedied?

01. Hydrogen Embrittlement Fracture, Holes
Main Causes: 1. Slight wear is normal due to the brazing furnace mesh belt o

perating at high temperatures for extended periods; 2. Solder dripping causes localized high temperatures in the mesh belt, leading to hydrogen embrittlement fracture; 3. Leaks may exist in the brazing furnace liner, allowing water vapor to enter and trigger hydrogen embrittlement; …etc.

Remedial Measures: 1. Inspect the furnace atmosphere; 2. Check the location, size, and number of hydrogen embrittlements. If it is only a localized fracture, emergency repairs can be performed; 3. Lay gaskets on the mesh belt to prevent direct contact between the solder and the mesh belt and the resulting chemical reaction. For example, use graphite or stainless steel gaskets.

02. Regular Tearing
Main Causes: 1. Carbon deposits, nodules, or other impurities in the furnace; 2. Mechanical damage to the brazing furnace; …etc.

Remedial Measures: 1. Shut down the furnace and inspect and clean the furnace chamber for foreign objects and impurities; 2. Check the brazing furnace for mechanical problems; …etc.

03. Severe Deformation

Main Causes: 1. Overheating: The longer the metal mesh belt remains in the high-temperature zone, the greater the damage. 2. Material overloading or uneven placement. 3. Incorrect dimensions provided when customizing the brazing furnace mesh belt. …etc.

Remedial Measures: 1. Monitor furnace temperature in real time and optimize process settings. 2. During workshop operations, materials must be evenly distributed; avoid uneven, excessive, or excessively high placement. …etc.

04. Brittleness and Arching
Main Causes: 1. Prolonged exposure to high temperatures in the brazing furnace can cause oxidation of the conveyor belt, leading to rapid embrittlement. 2. A carbon-rich furnace atmosphere can cause “carburization embrittlement” of the conveyor belt. 3. The embrittled belt may suddenly arch, twist, or even break under pressure. …etc.

Remedial Measures: 1. Strictly control the furnace atmosphere to prevent oxidation and excessive carburization. 2. Inspect and maintain the transmission system. …etc.