Title: Present situation and development of cold-heading steel in China
Abstract: To summarize the present situation of cold-heading steel production in China. The carbon content in steel is controlled to the middle or lower limit. Proper manganese can improve the carbon existent form and distribution in steel. It is favorable to improve cold forming of steel. When mold casting bloom rolls,remnant is cut. Through magnetic testing after grinding and repairing,the surface quality of billet rolling is guaranteed. By adopting single wire multi-channel flexible switching technology,750 ℃ low temperature rolling is realized. Basic structure is ferrous plus pearlite. The size of inclusions within 2 mm from steel surface is no bigger than 0.15 micron. The compact and fine microstructure of cold-heading steel and no inner defects are guaranteed. For the development of cold-heading steel,it is pointed out that to promote energy-saving non-annealed and non-quenched and tempered new steel and new technology,new process,to enhance production level of raw material for cold-heading steel,to improve the comprehensive mechanical properties through heighten the vanadium content of boron steel and lower phosphorus,sulfur and carbon content,ultra-fine grain steel is researched and developed.
Publication Year: 2009
Publication Date: 2009-01-01
Language: en
Type: article
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