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研究了Haynes 282耐热合金700℃下经100、300、1000、3000 h时效处理后组织和力学性能的变化规律。结果表明,282合金主要析出相为M_(23)C_6、MC和γ’相,700℃长期时效后,晶界M_(23)C_6型碳化物和晶内MC型碳化物长大,γ’相随时效时间的延长长大缓慢。282合金冲击吸收能量随时效时间的延长逐渐下降,晶界链状分布的M_(23)C_6型碳化物是造成其冲击吸收能量下降的原因之一。282合金硬度随时效时间的增加而增加,时效过程中γ’相的含量及尺寸变化对合金硬度影响较大。
The changes of microstructure and mechanical properties of Haynes 282 heat-resistant alloy after aging at 700 ℃ for 100, 300, 1000 and 3000 h were studied. The results show that the main precipitates of 282 alloy are M_ (23) C_6, MC and γ ’phases. After aging at 700 ℃ for a long time, the grain boundary M_ (23) C_6 carbides and intergranular MC carbides grow up, With the aging of the time to grow slowly. The energy absorption of 282 alloy decreases with the aging time, and M_ (23) C_6 carbides distributed in the grain boundaries are one of the reasons for the decrease of impact absorption energy. 282 alloy hardness increases with the increase of aging time. The content of γ ’phase and the dimensional change have a great effect on the hardness of the alloy during aging.