高铬锰合金钢的显微组织、冲击韧性及抗高温氧化性能

Microstructure, Impact Toughness and High Temperature Oxidation Resistance of the High Chromium Manganese Alloy Steels

研究了含碳量和含镍量对铸态和水淬固溶处理态高铬锰合金钢显微组织和冲击韧性的影响,及水淬固溶处理对高铬锰合金钢抗高温氧化性能的影响.研究结果表明,高铬锰合金钢的铸态和热处理态组织均为奥氏体＋碳化物.随着含碳量的增加,高铬锰合金钢的碳化物数量增多.随着含镍量的增加,奥氏体稳定性提高,高铬锰合金钢的碳化物数量减少.1 100℃水淬固溶处理高铬锰合金钢的碳化物数量明显少于1 050℃水淬固溶处理合金钢.1 100℃水淬固溶处理高铬锰合金钢的冲击韧性高于铸态和1 050℃水淬固溶处理合金钢.含碳0.225％～0.306％的高铬锰合金钢经1 100℃水淬固溶处理后冲击韧性较高,冲击吸收功130～138 J.碳化物数量是影响高铬锰合金钢冲击韧性的重要因素.铸态高铬锰合金钢的抗高温氧化性能高于1 100℃水淬固溶处理合金钢,两者抗高温氧化性能均高于1 050℃水淬固溶处理合金钢.基体含铬量是影响高铬锰合金钢抗高温氧化性能的重要因素.

The influence of carbon and nickel content on the microstructure and impact toughness of the as-cast and water quenching solid solution treated high chromium manganese alloy steel were studied. The influence of the water quench solid solution treatment on the properties of high chromium manganese alloy steel and high temperature oxidation resistant properties were also discussed. The results show that the microstructure of as-cast and heat treatment high chromium manganese alloy steel are both austenite and carbide. With the increase of carbon content, the number of carbide in high chromium manganese alloy steel increased. However, with the increase of nickel content, austenitic stability increased, while the number of carbide in high chromiunl manganese alloy steel decreased. The carbide amount of 1 100 ℃ water quenching solid solution treated high chromium manganese alloy was less than that of 1 050 ℃ one. But the impact toughness of 1 100 ℃ water quenching solid solution treated high chromium manganese alloy steel was higher than that of as-cast and 1 050 ℃ one. The impact toughness of 1 100 ℃ water quenching solid solution treated high chromium manganese alloy steel with 0.225 wt.%-0.306 wt.% carbon was higher, which was 130-138 J. Carbide amounts are tile key influence factors on the impact toughness of high chromium manganese alloy steel. The high temperature oxidation resistant properties of as-cast high chromium manganese alloy steel was higher than that of 1 100 ℃ water quench solid solution treated alloy steel. But the high temperature oxidation resistant properties of these 2 kinds steel above were both higher than that of 1 050 ℃ water quench solid solution treated alloy steel. The chromium content in the matrix is the main influence factor on the high temperature oxidation resistance of high chromium manganese alloy steel.