Among the auto parts, because of the different positions used, there are different functions, such as fastening and pressing. A few days ago, we came into contact with an inquiry about 65Mn cold-rolled steel strip for auto parts, 1.5mm products.
For this product, because of the complex molding, the hole spacing tolerance is ±0.1, which is similar to the shrapnel, and it has requirements for the flexibility and life after bending. And the product is longer, these two points are often the most complicated in molding. Basically, if this product is heat-treated in the later stage, the single piece of the product is longer, 290mm in length, and requires a flatness of 0.15mm. In the quenching and tempering process of 65Mn cold-rolled steel strip, if the quenching process is not very good, the stress caused is relatively large, and it is prone to deformation.
If the hardened cold-rolled steel strip is used for production, the difficulty lies in forming. The 65Mn product requires a hardness of hrc41-50. At this hardness, the tensile strength is basically around 1800mpa, and the extension can generally only be 8% or more. For this extension, if you want to do such a complex molding, the mechanical properties of the 65Mn material are very demanding, even in the austempering that we often use.
Are you also interested in further steel processing (machining)?
Just like you, 70% customers choose long-term cooperation with BBN steel not only for our good product and service quality, good reputation in the international market, but also for our experienced one-stop raw material supply and further steel processing!
Fabrication and Machining Service24h Technical support
