The stamping parts on the automobile body are generally divided into cover parts, beam parts and general stamping parts. Metal stamping parts are widely used in automobiles. The metal stamping process is suitable for the needs of multi-variety and mass production of automotive stamping parts industry. The steel used for cold stamping is mainly steel plate and steel strip, accounting for 72.6% of the steel consumption of the whole vehicle. The cold stamping material affects the quality, cost, service life and production organization of the product. Therefore, the reasonable selection of automobile stamping materials is an important Work.
When selecting materials for automotive stamping parts, first select metal materials with different mechanical properties according to the type of automotive stamping and use characteristics. Usually, the following principles should be followed when selecting materials for automotive stamping parts:
- a The selected material should have better economy.
- b The selected material should have good process performance;
- c. The selected materials should first meet the performance requirements of auto parts; each specific auto part of auto stamping parts bears different loads, so the requirements for materials are also very different.
Requirements for material properties of automobile compartment parts
Most of the automobile compartment parts adopt the roll forming process, which has certain requirements on the formability, rigidity, corrosion resistance and weldability of the material. Generally, high-strength steel plates with a strength level of 300-600MPa and ultra-fine grain steel are used.
Requirements for material properties of automotive cab parts
The parts of the car cab are not subjected to much force, and the mold forming process is used, which requires the material to have formability, tension rigidity, elongation, concave resistance, corrosion resistance and weldability. In product design, low-carbon cold-rolled steel sheets with excellent drawing properties, ultra-low carbon cold-rolled steel sheets, cold-rolled dual-phase steel sheets, phosphorus-containing cold-rolled steel sheets with higher strength, Hardened cold-rolled steel sheets, ultra-low carbon steel high-strength cold-rolled steel sheets, phosphorus-containing cold-rolled steel sheets with higher strength, and other types of steel sheets such as coated steel sheets, tailor-welded steel sheets, and TRIP steel sheets.
Requirements for material properties of automobile frame parts
The frame, the middle plate of the carriage and some important bearing parts are mostly formed by stamping die forming process, which requires the material to have high strength and good plasticity, as well as fatigue durability, collision energy absorption capacity and weldability. Generally, high-strength steel sheets, ultra-fine grained steel sheets (with a strength level of 300-610 MPa) and ultra-high-strength sheets (with a strength level of 610-1000 MPa) with better formability are selected.
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