When ceramic liners are often welded, the mold body around the molten pool is characterized by arc heating on the top, metal on both sides, and ceramic pads on the bottom. Due to the heating effect of the arc above the molten pool, the temperature is high; The crystallization of the ceramic welding tape molten pool is bottom-up crystallization. When the arc is extinguished, the mold body around the molten pool is: the upper natural cooling, the two sides of the metal cooling fast, the lower ceramic liner has a thermal insulation effect cooling slow. When the arc is extinguished, due to the removal of the arc heating action above the molten pool, the thermal insulation effect of the ceramic liner under the molten pool is removed. Let the upper part of the molten pool cool down quickly first crystallize. The lower part of the molten pool cools slowly and finally crystallizes, and the back side produces shrink holes. Some common problems with welding pads during the welding process always arise.
1. How to deal with too much sticky slag on the back of the weld?
A: This is mainly due to the inappropriate formulation of the welding pad or the mismatch between the flux cored welding wire and the pad, as long as these two aspects are handled properly, this problem can be solved
2. Why do do dotted pressure pits appear on the surface of the weld?
A: Generally, problems occur for the following three reasons:
(1) The liner absorbs moisture; (2) The protective gas contains impurities; (3) The flow rate of the protective gas is too small.
3. How is the uneven weld on the back of the gasket weld produced?
A: This is related to the instability of Ceramic Band Heater the welding specification, such as the welding wire directly touching the liner, it will form a local melt depth increase, resulting in unevenness on the back of the weld.
4. What should I do if the residual height of the back weld increases?
A: The increase in the residual height of the weld on the back of the weld is mainly due to the following factors, such as:
(1) Large current, fast welding speed without swing; (2) Low melting point of the liner.

Welding pad is one of the main products of our company, today Xiaobian introduces the characteristics of the pad, I hope to have some help for you. Welded pads are characterized by flake pad mounting parts with a sticking function on one side; And the rubber-like elastic material made of the rubber-like elastic material formed with the sheet liner mounting parts, using the pasting function of the sheet liner mounting parts, assembled on the mounting object parts. As a professional manufacturer Kamado bbq grill of welding liners, we have rich production experience and advanced technical force. The resulting liners are of reliable quality and reasonably priced.