| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To solve the problem which has not been solved by the conventional technology, i.e., the problem that, as a steel product used for structures such as buildings and bridges, automobile chassis steel and mechanical parts such as gears, when a steel product such as a thick steel plate, shape steel, deformed bar steel, bar steel and steel wire having high strength and high ductility and having excellent energy absorption ability is produced, inexpensive and desired steel can not be produced owing to multi-resources-high energy and a multi-process in the existent production line without adding expensive alloy elements and without imposing an excessive load on production equipment. <P>SOLUTION: There is provided the steel product with a two phase structure in which aγ/αproduction ratio is controlled, for producing the steel product such as the thick steel plate, shape steel, deformed bar steel, bar steel and steel wire having high strength and high ductility and having excellent energy absorption ability used for structures such as buildings and bridges, automobile chassis steel and mechanical parts such as gears, by using low C steel admixed with inexpensive Mn and Si as the stock and performing short time rolling treatment. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
