Energy Saving Melting and Revert Reduction (E-SMARRT): Optimization of Heat Treatments on Stainless Steel Castings for Improved Corrosion Resistance and Mechanical Properties

John N. DuPont ; Jeffrey D. Farren ; Andrew W. Stockdale ; Brett M. Leister

关键词: ALLOYS;    CASTINGS;    CORROSION;    CORROSION RESISTANCE;    DISSOLUTION;    ELECTRON PROBES;    HEAT TREATMENTS;    HIGH ALLOY STEELS;    KINETICS;    MECHANICAL PROPERTIES;    MELTING;    MICROANALYSIS;    OPTICAL MICROSCOPY;    OPTIMIZATION;    STAINLESS STEELS Metalcasting;    Steel Casting;    Welding;    Corrosion;    Heat Treatment;   

DOI  :  10.2172/1045448
RP-ID  :  NA
PID  :  OSTI ID: 1045448
Others  :  TRN: US201215%%194

美国|英语

来源: SciTech Connect

【 摘 要 】

It is commonly believed that high alloy steel castings have inferior corrosion resistance to their wrought counterparts as a result of the increased amount of microsegregation remaining in the as-cast structure. Homogenization and dissolution heat treatments are often utilized to reduce or eliminate the residual microsegregation and dissolve the secondary phases. Detailed electron probe microanalysis (EPMA) and light optical microscopy (LOM) were utilized to correlate the amount of homogenization and dissolution present after various thermal treatments with calculated values and with the resultant corrosion resistance of the alloys.The influence of heat treatment time and temperature on the homogenization and dissolution kinetics were investigated using stainless steel alloys CN3MN and CK3MCuN. The influence of heat treatment time and temperature on the impact toughness and corrosion reistance of cast stainless steel alloys CF-3, CF-3M, CF-8, and CF-8M was also investigated.