Al and Zn strengthened Mg-Sn-RE-based high-toughness heat-resistant magnesium alloy

• Main Authors: TANG YONGBAI, LI SHICHENG, DING WUCHENG, CHEN YUNGUI, XIAO SUFEN
• Format: Patent
• Language: Chinese; English
• Published: 16.11.2011
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention provides a cheap-light-rare-earth-containing Mg-Sn-RE-based high-toughness heat-resistant magnesium alloy. The chemical formula of the alloy is Mg-xSn-yRE-zM, wherein x is more than or equal to 2 weight percent and less than or equal to 8 weight percent, y is more than or equal to 0.5weight percent and less than or equal to 3 weight percent, z is more than or equal to 1 weight percent and less than or equal to 6 weight percent, RE represents La and Ce, M is one or two elements of Al and Zn, and the balance is Mg, a small amount of other elements and unavoidable impurities. The Al and the Zn have an obvious strengthening effect on the Mg-Sn-RE-based alloy, the alloy has the tensile strength of 270MPa and the elongation of about 15 percent in an as-cast state, and the steady-state creep rate of the alloy at the temperature of 175 DEG C under the pressure of 55MPa can be reduced to about 1.0*10<-7>/percent.s, which is far lower than that of an alloy junction (AJ) series heat-resistant magnesium all