Resource-saving diphase stainless steel alloy material and preparation method thereof

• Main Authors: TIAN RUI, NI JIANSEN, ZHAO JUNLIANG, LI JUN, ZHANG LINGGUANG, CUI JIAN, JIANG LAIZHU, SONG HONGMEI, XIAO XUESHAN
• Format: Patent
• Language: Chinese; English
• Published: 30.06.2010
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to a resource-saving dual phase alloy material and a method for preparation. The compositions and the mass percentage of the alloy material are that carbon is bigger than 0 and is equal or less than 0.04 percent, sulfur is bigger than 0 and is equal or less than 0.01 percent, silicon is bigger than 0 and is equal or less than 1.0 percent, phosphorus is bigger than 0 and is equal or less than 0.015 percent, chromium is 24.0-26.0 percent, manganese is 9.0-13.0 percent, nitrogen is 0.35-0.45 percent, boron is 0.001-0.01 percent, rare earth cerium or yttrium is 0.005-0.20 percent, and other portion is ferric. The steel in the composition range of the economical dual phase stainless steel alloy material of the invention are all dual-phase regions in 1000-1300 DEG C, the austenite content changes between about 40 percent to 60 percent, tensile fracture strength is between 850 MPa to 1000 MPa in room temperature, the yield strength is 650-800 MPa, and the fracture elongation is 25-50 percent.