Rare earth-contained high-manganese cold-rolled steel plate and manufacturing method thereof
A technology of cold-rolled steel sheet and high manganese, which is applied to the field of rare earth-containing high-manganese cold-rolled steel sheet and its manufacturing, can solve the problems of low yield strength and tensile strength, unfavorable cost control, and high Mn content, and achieves good manufacturability, The effect of good product performance uniformity and high production efficiency
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[0043] The present invention will be further described below in conjunction with specific embodiments.
[0044] The components of the embodiment of the present invention are smelted, hot rolled, cold rolled, annealed and flattened to obtain products. The components are shown in Table 1, and the annealing process and mechanical properties are shown in Table 2. figure 1 It is the elongation change data of Example 7 and Comparative Example 2 of the present invention under cold rolling deformation conditions.
[0045] It can be seen from Table 1 that the present invention, through appropriate composition design and process coordination, the room temperature microstructure of the rare earth-containing high manganese cold-rolled steel sheet is 100% austenite; the recrystallization fraction is 80-95%; the yield strength is 450 ~650MPa, tensile strength between 950~1100MPa, elongation above 50%, ultra-high strength cold rolled steel plate with good delayed cracking performance.
[0046] figu...
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