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研究了热处理工艺对含Si蒙乃尔合金组织及硬度的影响。结果表明:固溶温度在820～1120℃之间,合金随着固溶温度的升高,晶界处的β-Ni3Si相的数量明显减少;当固溶温度达到1020℃时,晶界处β-Ni3Si相完全溶解;随着固溶温度的进一步升高,当温度达到1120℃时,晶界因熔化而出现了鱼骨状过烧组织。时效温度在500～700℃之间,合金随着时效温度的升高,合金中的β-Ni3Si强化相的数量逐渐增加,硬度也随之增大;在时效温度为600℃时,β-Ni3Si强化相析出的数量最多,合金硬度最高;时效温度为700℃时,合金中的部分β-Ni3Si相聚集长大,合金硬度降低。
The effect of heat treatment on the microstructure and hardness of Si-bearing Monel alloy was investigated. The results show that the solution temperature is between 820 and 1120 ℃. The amount of β-Ni3Si phase in the grain boundaries decreases with increasing the solution temperature. When the solution temperature reaches 1020 ℃, the β -Ni3Si phase completely dissolved; with the further increase of solution temperature, when the temperature reaches 1120 ℃, the grain boundary due to melting appeared fishbone-like over-burning tissue. The aging temperature is between 500 and 700 ℃. With the increase of aging temperature, the amount of β-Ni3Si strengthening phase in the alloy gradually increases and the hardness increases. When the aging temperature is 600 ℃, β-Ni3Si The amount of precipitated phase is the most, and the hardness of the alloy is the highest. When the aging temperature is 700 ℃, some β-Ni3Si phases in the alloy aggregate and grow, and the hardness of the alloy decreases.