Cold rolling production method of medium-chromium ferrite stainless steel for vehicle exhaust system
一种汽车排气系统、生产方法的技术,应用在金属轧制、金属轧制、轧机控制装置等方向,能够解决提高制造成本、起皱和开裂、成形性不良等问题,达到降低生产成本、大剪切应变能、提高生产效率和成材率的效果
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Embodiment 1
[0043] The longitudinal grain structure of the cold-rolled annealed sheet of embodiment 1 is as follows figure 1 As shown, the corresponding grain size is grade 7. The grain structure of comparative example 1 is as figure 2 As shown, the grain size is 6.5.
[0044] Depend on figure 1 , figure 2 It can be seen that the steel grains produced by five continuous rolling of the present invention are smaller and more uniform than the steel grains produced by twenty-rollers of Comparative Example 1. big. Therefore, the present invention has a high recrystallization nucleation rate, finer grains after annealing, and uniform grain size in the thickness direction.
[0045] Example 1 and comparative example 1 steel plate longitudinal section shear strain after cold rolling is respectively as follows image 3 , Figure 4 shown. Depend on image 3 , 4 It can be seen that on the longitudinal section of the slab corresponding to Example 1, a shear strain ring with a large amplitu...
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