Non-heat treated steel for hot forging with easy fracture splitting
    8.
    发明公开
    Non-heat treated steel for hot forging with easy fracture splitting 审中-公开
    BruchtrennbarerwärmeunbehandelterStahl zum Warmschmieden

    公开(公告)号:EP1243665A1

    公开(公告)日:2002-09-25

    申请号:EP02006565.2

    申请日:2002-03-21

    IPC分类号: C22C38/60 C22C38/02 C22C38/04

    摘要: Disclosed is a non-heat treated steel for hot forging, particularly suitable for producing connecting rods of automobile engines. The steel consists essentially of: by weight, C: 0.3-0.8%, Si: 0.1-2.0%, Mn: 0.3-1.5%, P: 0.01-0.15%, Cr: 0-1.0%, V: 0-0.4%, Al: 0-0.05%, N: 0.005-0.03% and the balance being Fe and inevitable impurities, provided that the contents of C, Mn and Cr fulfill the following condition: 1.40[C%]+0.28[Mn%]+0.50[Cr%]≧ 0.75 Pearlite area fraction in this steel after hot forging is 50% or more. Notches are provided with laser beam on an intermediate part at the location from which fracture starts, and load is applied. Then, the intermediate is split to be two components (big end or cap and small end/rod for connecting rod). The components are adhered to form the parts.

    摘要翻译: 公开了一种用于热锻的非热处理钢,特别适用于制造汽车发动机的连杆。 钢基本上由以下组成:C:0.3-0.8%,Si:0.1-2.0%,Mn:0.3-1.5%,P:0.01-0.15%,Cr:0-1.0%,V:0-0.4% ,Al:0-0.05%,N:0.005-0.03%,余量为Fe和不可避免的杂质,条件是C,Mn和Cr的含量满足下列条件:1.40ÄC%Ü+0.28ÄMn%Ü+0.50ÄCr %ü> / = 0.75热锻后钢中的珍珠岩面积分数为50%以上。 在断裂开始的位置的中间部分设置有激光束,并施加负载。 然后,将中间体分为两个部件(大端或帽和连接杆的小端/杆)。 这些部件被粘附以形成部件。