热处理温度对热镀锌双相钢组织和性能的影响

Effect of Heat Treatment Temperature on Microstructure and Properties of Dual-phase Steel Containing Chromium

对不同温度热处理的两种热镀锌双相钢的组织和性能进行了测试,研究了热处理温度对热镀锌双相钢组织和性能的影响,结果表明:在780℃热处理时,组织中存在一定比例的珠光体组织,当热处理温度在800℃以上时,组织为铁素体+马氏体。热镀锌双相钢的屈服强度随热处理温度的升高而降低,当热处理温度从780℃上升到800℃时,屈服强度急剧下降。屈强比随热处理温度的升高而降低,当热处理温度从780℃上升到800℃时,屈强比急剧下降。

The microstructure and properties of two series of galvanized dual - phase steel were researched with different heat treatment temperature at labor. The results show that pearlite exists at 780 ℃ heat treatment. The microstructure of dual - phase steel is ferrite ＋ martenite when heat treatment temperature is up to 800 ℃. The yield strength decreases with increaseing of heat treatment temperature, the yield strength decrease sharply when heat treatment temperature increases from 780 ℃ to 800 ℃. The ratio of yield strength / tensile strength decrease with increaseing of heat treatment temperature.