Surface Finish Study of Hard Milling 45 Steel with PCBN Tool
Experimental study on surface finish of high speed mill of hardened 45 steel was carried out with PCBN tool. Cutting parameters studied include different cutting depth, cutting speed and feeding speed. Surface finish after cutting were measured and compared with that of grinding. Experimental results showed that for high speed milling of hardened 45 steel, the surface finish can be very fine, different cutting parameters all have explicit effect on surface finish.
By referring to Xinsteel Company's experience, and taking into account the current situation of SISG, the manual spray-lining of the No.5 B.F. at SISG was completed successfully. And, by properly allocating the blowing-in materials and making a proper transition from the blast operation to the loading of the follow-up materials, the production capacity of the furnace was fully resumed the next day after the blowing-in.