A kind of cold-rolled strip steel for automobile flywheel processed by precision stamping and its manufacturing method
A cold-rolled steel strip and precision stamping technology, applied in the field of cold-rolled steel strip, can solve the problems of high manufacturing cost of cold-rolled steel strip, mismatch between high strength and toughness of cold-rolled steel strip, inability to meet precision stamping forming, etc. Achieve the effect of reducing energy consumption, reducing material heat treatment consumption, reducing annealing temperature and annealing holding time
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[0043] The present invention will be further described below in conjunction with Examples 1-4 and Comparative Example 1—disclosed in Chinese Patent Application 200780004015.3, and Comparative Example 2—disclosed in Chinese Patent Application 200910196007.4, as shown in Tables 1 to 4.
[0044] Table 1 Chemical composition of the present invention (mass percentage %), the balance is Fe and unavoidable impurities.
[0045]
[0046] The molten steel that meets the required chemical composition is obtained through converter melting. The molten steel is refined in the LF ladle refining furnace, and the RH furnace is subjected to vacuum cycle degassing treatment. The pure degassing time of RH is more than 10 minutes, and then continuous casting is carried out to obtain continuous casting steel slabs with a thickness of 210~ 230mm, width 1000~1500mm, length 5000~11000mm.
[0047] The continuous casting steel billet adopts the hot charging and hot delivery process, and is directly s...
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