Steel bar form steel plant→Physical and chemical inspection→Surface treatment→Cutting→Heating→Hot piercing→
Shell storage→Pickling and lubrication→Cold rolling→Heat treatment→Pickling and lubracation→Cutting→Punching→
Cold drawn→Size inspection→Outer and inner surface cleaning→NBK&GBK→Mechanics inspection→Chemical inspection→
Straightening→Trim →Black phosphated heatment→Edy current testing→Antirust oil painting→
Straightening→Trim →Cleaning →Edy current testing→Antirust oil painting→
Straightening→Trim →Polishing(if required)→Edy current testing→Antirust oil painting→
Print→Packing→Finished storage→Delivery with quality certificate
1).We adopt special techniques and special skill in the acid cleaning process to deal with the place where it’s easy to form fold crevice;
2).We organized process,especially annealing treatment in a severely technical manner;
3).In respect with lubrication,we adopt the brand-new treating process in the world,and put the surface quality of our products under strict control in orderto prevent causing surface crack.
