The results show that tensile strength and rigidity was a little decreased,the ductibility was increased and the synthetic mechanical properties was improved.

• 结果表明,进行了预退火处理的奥贝球铁材料的强度、硬度有一定的降低,但其伸长率有较大幅度的提高,材料的综合力学性能得到极大的改善。