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研究了1050~1080℃高温固溶处理以及500℃回火后耐高温轴承钢的组织和性能。结果表明,当固溶温度在1050~1080℃之间时,试验钢的强度随着固溶温度的升高逐渐降低,而塑性和冲击性能逐渐升高;固溶温度的提高会使马氏体板条由短粗逐渐变长、变细,提高了试验钢的塑性和冲击性能。随着固溶温度的升高,试验耐高温轴承钢的奥氏体晶粒显著长大和粗化,导致其强度降低。
The microstructure and properties of high temperature bearing steel after solution heat treatment at 1050 ~ 1080 ℃ and tempering at 500 ℃ were studied. The results show that when the solution temperature is between 1050 ℃ and 1080 ℃, the strength of the test steel decreases with the increase of the solution temperature, while the plasticity and impact resistance increase gradually. When the solution temperature is increased, the martensite The slats gradually become longer and thinner from the stubby to improve the plasticity and impact performance of the test steel. As the solution temperature increases, the austenite grains of the tested high temperature bearing steel significantly grow and coarsen, resulting in a decrease in their strength.