Excellent mechanical properties are obtained by austempering after hot deformation without subsequent heat treatment in the present Si-Mn TRIP steel sheets. Isothermal holding time after finishing rolling has affected...Excellent mechanical properties are obtained by austempering after hot deformation without subsequent heat treatment in the present Si-Mn TRIP steel sheets. Isothermal holding time after finishing rolling has affected the mechanical properties of this steel. The results show that the sample exhibits a good combination of ultimate tensile strength and total elongation when it is held at the bainite transformation temperature after hot deformation. The stability of retained austenite increases with an increase of isothermal holding time, and a further increase in the holding duration results in a decrease of it. The tensile strength, total elongation and strength ductility reach the maximum values (774MPa, 33% and 25542MPa% respectively) for this sort of hot rolled Si-Mn TRIP steel using the optimal technology.展开更多
A great deal of stabilized retained austenite can be obtained by means of austempering immediately after intercritical annealing in the low-carbon plain steel sheets which only contain alloying elements of silicon and...A great deal of stabilized retained austenite can be obtained by means of austempering immediately after intercritical annealing in the low-carbon plain steel sheets which only contain alloying elements of silicon and manganese. Transformation from retained austenite to martensite may be induced by strain at a temperature ranging from 50 ℃ to 400 ℃ during tension testing. Transformation-induced plasticity (TRIP) may occur. Alloying of silicon improves the stability of retained austenite. Mechanical properties of the present TRIP steels containing manganese increase with increasing silicon amount when the amount of silicon is less than two percent.展开更多
Objective: to analyze the effect of Muscular Amino Acids and Peptides and Nucleosides Injection combined with Kangfuxin Liquid and vitamin C on the healing of diabetic lower extremity skin infection. Methods: a total ...Objective: to analyze the effect of Muscular Amino Acids and Peptides and Nucleosides Injection combined with Kangfuxin Liquid and vitamin C on the healing of diabetic lower extremity skin infection. Methods: a total of 1 patients with diabetes mellitus who had skin scratching after bilateral lower extremities were treated with Muscular Amino Acids and Peptides and Nucleosides Injection daily for 1 times and Kangfuxin Liquid for 3 times daily and vitamin C tablets 0.1g for 3/ days. The growth, speed and adverse reactions of the wound were observed. Results: the skin of diabetic patients with lower limb ulceration was healed without any side effects. Conclusion: Muscular Amino Acids and Peptides and Nucleosides Injection combined with Kangfuxin Liquid and vitamin C in the treatment of diabetic lower limb infection can not only promote local tissue repair and epithelial regeneration, but also heal quickly and have no adverse reactions.展开更多
基金supports of the National Natural Science Foundation of China(No.50334010)the foundation of the doctor degree thesis of northeaster university(No.200302).
文摘Excellent mechanical properties are obtained by austempering after hot deformation without subsequent heat treatment in the present Si-Mn TRIP steel sheets. Isothermal holding time after finishing rolling has affected the mechanical properties of this steel. The results show that the sample exhibits a good combination of ultimate tensile strength and total elongation when it is held at the bainite transformation temperature after hot deformation. The stability of retained austenite increases with an increase of isothermal holding time, and a further increase in the holding duration results in a decrease of it. The tensile strength, total elongation and strength ductility reach the maximum values (774MPa, 33% and 25542MPa% respectively) for this sort of hot rolled Si-Mn TRIP steel using the optimal technology.
文摘A great deal of stabilized retained austenite can be obtained by means of austempering immediately after intercritical annealing in the low-carbon plain steel sheets which only contain alloying elements of silicon and manganese. Transformation from retained austenite to martensite may be induced by strain at a temperature ranging from 50 ℃ to 400 ℃ during tension testing. Transformation-induced plasticity (TRIP) may occur. Alloying of silicon improves the stability of retained austenite. Mechanical properties of the present TRIP steels containing manganese increase with increasing silicon amount when the amount of silicon is less than two percent.
文摘Objective: to analyze the effect of Muscular Amino Acids and Peptides and Nucleosides Injection combined with Kangfuxin Liquid and vitamin C on the healing of diabetic lower extremity skin infection. Methods: a total of 1 patients with diabetes mellitus who had skin scratching after bilateral lower extremities were treated with Muscular Amino Acids and Peptides and Nucleosides Injection daily for 1 times and Kangfuxin Liquid for 3 times daily and vitamin C tablets 0.1g for 3/ days. The growth, speed and adverse reactions of the wound were observed. Results: the skin of diabetic patients with lower limb ulceration was healed without any side effects. Conclusion: Muscular Amino Acids and Peptides and Nucleosides Injection combined with Kangfuxin Liquid and vitamin C in the treatment of diabetic lower limb infection can not only promote local tissue repair and epithelial regeneration, but also heal quickly and have no adverse reactions.
