2010•Heat treatment of metalsRequires access
Influence of heating temperature on microstructure and properties of X80 steel bends
Peng Wang
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Abstract
Microstructure and properties of steel used for X80 induction bends were investigated at different temperatures(850-1150 ℃) by using hot simulation test.The results show that the strength of X80 steel treated by second heating and quickly cooling is greater than that of the raw steel,Charpy impact energy decreases with increasing of heating temperature,the discreteness increases,but the impact test result at-20 ℃ can meet the requirements of engineering design.Microstructure of the steel heated at 950-1050 ℃ is granular bainite and a little ferrite,the grain is also fine,strength and toughness of the steel are better.