Coal machine column

Repair Name: Coal Machine Column Repair
Material used: Martensitic stainless steel

 

Basic situation of cladding parts: total length of test piece is 1000mm, outer diameter is 217mm, wall thickness is 13.5mm, cladding length is 940mm

The situation of cladding

Continuous cladding time is 45min, cladding surface efficiency is 0.84 square meters / hour

Change of round runout before and after cladding <0.10mm

Change of straightness before and after cladding <0.12mm

Cladding surface-no significant oxidation, dense coating with metallic luster

                    
PT inspection of cladding surface-no cracks shown

                    

Metallographic diagram of cladding layer cross section-dense cladding layer, combined with metallurgy of the substrate, dilution rate <1%

 

                    

Comparison chart before and after cladding-single-layer cladding layer thickness 370 ± 15µm, powder utilization rate: 93.7%