周鹏, 崔珊. Analysis and Process Improvement on Bending Cracking of 430 Stainless Steel 1.8 mm Cold Rolling-Annealing Pickling Plate[J]. Special Steel, 2019, 40(6): 51-54.
周鹏, 崔珊. Analysis and Process Improvement on Bending Cracking of 430 Stainless Steel 1.8 mm Cold Rolling-Annealing Pickling Plate[J]. Special Steel, 2019, 40(6): 51-54.DOI:
The cracking is appeared at bending 430 stainless steel pickling plate. In order to find out the cause o£ cracking
chemical composition analysis
mechanical properties test
metallographic analysis and crack analysis on the specimen have been carried out. The results show that the bending cracking of 430 stainless steel pickling plate is caused by the heterogeneity of grain size in matrix and the aggregation of precipitated corbide on grain boundary
which accelerated crack propagation along the grain boundary and led to bending cracking of products. It is proved that the abnormal microstructure is introduced by the longer annealing period of 430 stainless steel pickling plate at higher temperature. With control of annealing parameters of 430 stainless cold-rolling plate: annealing of 1
#
heating section at
840 〜850 ℃ and 2
#
heating section at 870 ~900 ℃. for 130 ~ 140 s in annealing process