High Nitrogen Austenitic Stainless Steels Manufactured by Nitrogen Gas Alloying and Adding Nitrided Ferroalloys

2007 ◽  
Vol 14 (3) ◽  
pp. 63-68 ◽  
Author(s):  
Hua-bing Li ◽  
Zhou-hua Jiang ◽  
Ming-hui Shen ◽  
Xiang-mi You
Keyword(s):  
Stainless Steels ◽  
Austenitic Stainless Steels ◽  
High Nitrogen ◽  
Nitrogen Gas

Manufacturing High Nitrogen Austenitic Stainless Steels by Pressurized Induction Furnace

2011 ◽  
Vol 52-54 ◽  
pp. 1687-1691 ◽  
Author(s):  
Hua Bing Li ◽  
Zhou Hua Jiang ◽  
Qi Feng Ma ◽  
Wan Ming Li
Keyword(s):  
Mechanical Properties ◽  
Stainless Steels ◽  
Induction Furnace ◽  
Steel Ingot ◽  
Austenitic Stainless Steels ◽  
Melting Process ◽  
Nitrogen Pressure ◽  
Induction Melting ◽  
High Nitrogen ◽  
Nitrogen Gas

A 25kg pressurized induction furnace with maximum nitrogen pressure 6MPa was invented to manufacture high nitrogen stainless steels. The suitable process was explored, and the analysis of radiography and macrosegregation of nitrogen of high nitrogen steel ingot was performed. The mechanical properties and inclusions of the forging ingot were also investigated. The suitable solidification nitrogen pressure can effectively prevent the formation of nitrogen porosity and macrosegregation of nitrogen. It is very important to control the purity of the nitrogen gas to a higher level for avoiding the manganese loss and decreasing oxygen content in the steel during the nitrogen gas pressurized melting process. The sound and compact macrostructure high nitrogen austenitic stainless steel with nitrogen content above 1.0 wt % has been manufactured by the pressurized induction melting method. There are mainly nonmetallic inclusions with the size less than 5μm in the HNS-A ingot. The HNS-A exhibits excellent mechanical properties.

scholarly journals Brittle-to-Ductile Transition in Nickel-Free Austenitic Stainless Steels with High Nitrogen

2012 ◽  
Vol 98 ◽  
pp. 237-244 ◽  
Author(s):  
Masaki Tanaka ◽  
Tatsuro Onomoto ◽  
Toshihiro Tsuchiyama ◽  
Kenji Higashida
Keyword(s):  
Stainless Steels ◽  
Austenitic Stainless Steels ◽  
High Nitrogen ◽  
Brittle To Ductile Transition

scholarly journals Brittle-to-ductile Transition in Nickel-free Austenitic Stainless Steels with High Nitrogen

2012 ◽  
Vol 52 (5) ◽  
pp. 915-921 ◽  
Author(s):  
Masaki Tanaka ◽  
Tatsuro Onomoto ◽  
Toshihiro Tsuchiyama ◽  
Kenji Higashida
Keyword(s):  
Stainless Steels ◽  
Austenitic Stainless Steels ◽  
High Nitrogen ◽  
Brittle To Ductile Transition
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