Explanation

Cold rolled low-carbon steel plate or steel strip with excellent stamping forming performance, used to manufacture various stamping parts (such as containers, car bodies, instrument panels, etc.). The yield strength of deep drawing steel is low to ensure plastic deformation easily. The yield ratio is very low to ensure a large enough uniform plastic deformation capacity, and the most effective index to reflect the stamping performance of steel plate is the plastic strain ratio/? Value and addition: hardening index n-value, r The higher the value, the better the deep drawing performance. In order to obtain good deep drawing performance, it is necessary to use low-carbon tt containing, fine grain structure and ensure excellent surface quality and metallurgical quality. Cold rolled low-carbon steel plate and steel strip (GB/T5213-2008) are first represented by the letter DC? Followed by a sequence number, and the larger the number, the higher the deep drawing performance. DC 〇 3 (DQ level) can be used for general stamping parts. Only those above DC04 belong to deep drawing steel (DDQ level, r is greater than 1.6, n is greater than 0.18) DC05, DC06 and DC07 are called ultra deep drawing steel (EDDQ grade;?>1.9,>0.20). Ultra deep drawing steel is interstitial-free steel. "High strength cold-rolled steel plate and steel strip (GB/T20564.i-2007) are represented by the letter CR, followed by a numerical value representing the upper yield strength. Then English letters are used to represent the types UF interstitial-free steel, |) P dual-phase steel, BH bake hardening steel>.

Classification