Question

What should be paid attention to when surfacing welding cast wc?

Answer 1

Answer:

① Before surfacing, the surface of the surfacing part should be carefully cleaned with a steel brush, and there should be no defects such as oil, rust and scale.

② Before surfacing, the stacking surface of the surfacing part must be leveled to ensure an even distribution of the cast wc during surfacing.

③ When surfacing, the surface of the surfacing part is preheated by flame to form a very thin molten metal before surfacing.

④ When surfacing with oxygen-acetylene flame, the flame must maintain a slight excess of acetylene, oxygen: acetylene: 1:1.3, to protect the surface of the surfacing layer and the surfacing metal from oxidation.

Explanation:

⑤ Select the surfacing nozzle according to the size of the weldment and the degree of heating before surfacing. For example, if the medium-sized roller cone bit is welded, the suitable nozzle is used, the consumption of acetylene is 750 L/h. thermal spray find in wococarbide