It is a common technical difficulty to improve the strength of low magnetic stainless steel plates on the premise of ensuring ductility,corrosion resistance,and low magnetism.In this paper,the chemical composition of ...It is a common technical difficulty to improve the strength of low magnetic stainless steel plates on the premise of ensuring ductility,corrosion resistance,and low magnetism.In this paper,the chemical composition of low magnetic stainless steels with excellent paramagnetic stabilities and corrosion resistances was formulated through composition design and calculation.Through the alloying of Nb,V,and N and the controlled hot rolling process,large numbers of uniformly distributed high-temperature second phase particles were formed in the steel plate,and low magnetic stainless steel 35 mm plate with yield strength,ultimate tensile strength and elongation of 407 MPa,739 MPa and 54%respectively were obtained.The main strengthening strategies of the steel were solid solution strengthening and precipitation strengthening.The precipitation law and types of the high-temperature second phase in the steel were explored.The micro structure of the steel plate was characterized by scanning electron microscope,electron probe microanalysis,and transmission electron microscope.The magnetic properties of the steel plate were tested by a vibrating sample magnetometer.The relative magnetic permeability of the hot rolled plate was 1.0063 which met the requirement of low magnetism.展开更多
基金supported by the National Key Research Project of China(2016YFB0300402)。
文摘It is a common technical difficulty to improve the strength of low magnetic stainless steel plates on the premise of ensuring ductility,corrosion resistance,and low magnetism.In this paper,the chemical composition of low magnetic stainless steels with excellent paramagnetic stabilities and corrosion resistances was formulated through composition design and calculation.Through the alloying of Nb,V,and N and the controlled hot rolling process,large numbers of uniformly distributed high-temperature second phase particles were formed in the steel plate,and low magnetic stainless steel 35 mm plate with yield strength,ultimate tensile strength and elongation of 407 MPa,739 MPa and 54%respectively were obtained.The main strengthening strategies of the steel were solid solution strengthening and precipitation strengthening.The precipitation law and types of the high-temperature second phase in the steel were explored.The micro structure of the steel plate was characterized by scanning electron microscope,electron probe microanalysis,and transmission electron microscope.The magnetic properties of the steel plate were tested by a vibrating sample magnetometer.The relative magnetic permeability of the hot rolled plate was 1.0063 which met the requirement of low magnetism.
