首页>
外国专利>
STEEL FOR MECHANICAL STRUCTURES, METHOD OF HOT FORMING OF STEEL ELEMENT AND STEEL ELEMENT MANUFACTURED IN THIS WAY
STEEL FOR MECHANICAL STRUCTURES, METHOD OF HOT FORMING OF STEEL ELEMENT AND STEEL ELEMENT MANUFACTURED IN THIS WAY
展开▼
机译:机械结构用钢,钢元素的热成形方法和以这种方式制造的钢元素
展开▼
页面导航
摘要
著录项
相似文献
摘要
The invention relates to a steel for mechanical construction, characterized in that its composition is, in percentages by weight: 0,35 ≦ c ≦ 2,5%; 0,10% ≦ mn ≦ 2,5%; 0,60% ≦ si ≦ 3,0%; traces ≦ cr ≦ 4,5%; traces ≦ mo ≦ 2,0%; traces ≦ ni ≦ 4,5%; traces ≦ v ≦ 0,5%; traces ≦ cu ≦ 4% with cu ≦ ni% + 0,6 if%, if cu ≧ 0,5%; traces ≦ al ≦ 0,060%; traces ≦ ca ≤ 0,050%; traces ≦ b ≦ 0,01%; traces ≦ s ≦ 0,200%; traces ≦ t e ≦ 0,020%; traces ≤ is ≦ 0,040%; traces ≦ pb ≦ 0,070%; traces ≦ nb ≦ 0,050%; traces ≦ ti ≦ 0,050%; the remainder being iron and impurities resulting from the élaboration.l' invention also relates to a method of putting in the form of a piece of steel, characterized in that it provides a steel billet of the above composition, the billet is heated at a temperature between the solidus and liquidus in order to obtain a liquid phase and a solid phase globular, a shaping by thixoforging of said bar in order to obtain said piece, and a cooling of said piece. Finally, the invention relates to a steel part thus obtained.
展开▼