Forming method of scraper ring flat steel belt used for piston ring

The invention discloses a forming method of a scraper ring flat steel belt used for a piston ring. The forming method is characterized in that a qualified round steel wire with the sectional area close to that of the finished-product flat steel belt serves as a raw material. Firstly, through primary rolling of a two-roller mill, a primarily-rolled flat steel belt in the required size is acquired, the compression ratio is controlled to be 60-90%, a left roller and a right roller are each provided with a belt groove four-roller mill of grooves matched with the R-arc shape required by the two sides of the scraper ring flat steel belt used for the machined piston ring to perform multi-pass rolling so that size control and two-side R arc trimming can be achieved, and in order to acquire the finished-product flat steel belt in the required shape and size, each-pass compression rate is controlled to be 3-5%. The forming method can be used for efficiently producing the good-quality flat steel belt for the piston ring. The cross-section shape, the size precision, the cleaning rod performance and the production efficiency of the produced scraper ring flat steel belt are all remarkably improved, and production cost is much lower than that of steel belts produced through a special-shaped wire-drawing die and a splitting treatment forming method.