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1.    The strip steel should be annealed. The surface roughness should be 6.3μm.

2.    The powder particle size should be approximately 0.25mm;

3.    The cored wire should have compositions. Calcium content in silicon calcium cored wire should be higher than 28%;

4.    Powder weight error should not be more than the stated limit.

5.    Cored wire hasp should be compact with no powder leakage in the process of wire feeding;

6.    Weight and total length of the cored wire and weight of iron plate should be marked;

7.    The powder should be dry with less than 0.5% of water content. 

• [Editor:張德眾]