OCR Text |
Show 13 the thickness of billets. In turn, the overall improvement does not show that is expected, due to the billet mill is operated at too slow speed. The modelling results are being verified through demonstration of the holding furnace, the testing runs are yet continuously progressing. Summary A continuous holding furnace is designed and demonstrated to retrofit the temperature uniformity of billets at a limited space. Although an increase of the furnace length is able to lift up the billet tail portion exposed in atmospheric, it also suffers a slightly rise of the billet head. The modelling results show the improvement is not as profound as the expected, but that will be further verified by experimental runs of the holding furnace, and yet the testing is under progressing. References l.Arm. Iron and Steel Institute, "Steel Products Manual: Semifinished Hot Rolled and Cold Finished Bars". The Institute, N e w York, ( 1964) 2. K.G. Bergstrand and P. Nilsson, " Hot Surface Inspection by a New Eddy-Current Technique". Iron and Steel Engineer Year Book, (1980) Vol.57, pp75-77. 3. W.L. Roberts," Hot Rolling of Steel". (1983) N. Y, Marcel Dekker, Inc. 4. R.D. Goss and N. Toschi, JR., " Productivity Improvement through Automation of a Bar Mill Facility ". Iron and Steel Engineer 60, No.7, pp39-40 (1983) 5.0. Hintz and R.W. Blackbourn, " Recently Development in Machine Scarfing of Continuous Cast and Rolled Steel ". Iron and Steel Engineer Year Book, (1978) pp62~66. 6.W.t. Lankford, Jr.,N.L Samways, R.F. Craven and H.E. McGannon, " The Making, Shaping and Treating of Steel ", Chap.24, Association of Iron and Steel Engineers (1985) 7. R.W.K. Honeycombe and P. Hancock," Thermomechanical Treatment of Steels" American Society for Metals, ppl 66 (1982) |