摘要
研究了添加不同含量的B对含Si蒙乃尔合金铸态组织及硬度的影响。结果表明,在0～0.10%B(质量分数)范围内,随着B含量的增加,合金枝晶组织开始细化,共晶组织形貌由网状向断网状发展;B含量达到0.03%时,枝晶组织明显细化,共晶组织形貌呈断网状;进一步增加B含量,枝晶组织开始粗化,共晶组织形貌又开始向网状趋势发展。在0～0.10%B范围内,随着B含量的增加,合金的硬度呈先提高后降低的趋势;B含量达到0.03%时,合金的平均硬度HB达到最高值3440MPa。合金组织得到明显细化及合金硬度得到提高的主要原因是微量B元素在合金中起到强变质剂作用的结果。
The effect of B addition on microstructures and corrosion resistance of Monel alloy with Si was studied. The results show that the dendrites are gradually refined with increasing B in the range of 0%-0.10%B, while the eutectic structure evolves from netlike shape to disconnected netlike shape slightly. When the B additive reaches 0.03%, the dendrites are refined significantly and the eutectic structure has disconnected netlike shape. With further increasing the content of B, the dendrites begin to coarsen and the eutectic structure begins to change into netlike shape again. With the increase of B content, the hardness of the alloys decrease before increase in the range of 0-0.10%B. When the B additive is 0.03%, the alloy gets the highest hardness （HB） 3440 MPa. The main reason why microstructure is refined obviously and the hardness is increased significantly is that trace B element plays a strong inoculating role.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2009年第A01期133-138,共6页
Rare Metal Materials and Engineering
关键词
硼
含Si蒙乃尔合金
显微组织
二次枝晶间距
硬度
B
Monel alloy with Silicon
microstructure
secondary dendrite arm space（DAS）
hardness
