汽车发动机奥贝球铁齿轮等温淬火工艺研究

Study on the Austempering Technology of ADI Gears in the Truck Engine

针对某厂汽车发动机奥贝球铁齿轮材料，研究了等温淬火工艺对奥贝球铁组织和性能的影响。结果表明：经８８０℃奥氏体化＋３２０℃等温淬火处理，可获得上贝氏体／下贝氏体的混合组织。该组织具有优良的综合机械性能，满足了汽车发动机齿轮的技术要求。

The effect of austempering technology on microstructure and properties of ADI has been studied. The results show that the upper bainitie/lower bainitic mixture matrix can be obtained under the condition: 880℃ Austeniting+320℃ Austempering. The mixture matrix has optimum comprehensive mechanical properties and fully meet the technological requirements of ADI gears in the kind of truck engine.