摘要
碳含量是硬质合金质量控制的关键指标之一。磁饱和作为目前通用的硬质合金控碳手段,由于受到检测设备的限制,越来越无法适应现代硬质合金大制品控碳检测的需要。鉴于硬质合金中Co等铁磁性粘结相的存在,本文探索了采用铁素体检测仪通过测试硬质合金中铁素体含量来表征硬质合金的碳含量的可行性。以不同碳含量的WC+Co混合料为原料,采用低压烧结制备WC-Co硬质合金样品,分别测试样品的铁素体含量及磁饱和,并比较随着碳含量的变化,硬质合金的铁素体含量与其磁饱和之间的关系。结果表明:硬质合金的铁素体含量会随着硬质合金碳含量的变化而变化,且与合金的磁饱和变化呈现出线性关系。再加上铁素体测量是一种简单易行的方法,检测对象的大小不受仪器空间限制,能够广泛适用于各种规格硬质合金产品的碳含量检测,具有极大的推广应用价值。
It is important to control carbon content during cemented carbide production.The conventional method for controlling carbon content is adjusting magnetic saturation intensity.Because of the limitation of the detecting system,the big manufactures can＇t be detected in magnetic saturation intensity equipment.In the view of cobalt as the binder phase of cemented carbide is magnetic,ferrite detecting method is proposed in this paper to replace the tradition method of detecting the carbon content of cemented carbide manufactures in large size.The WC-Co samples with different carbon content sintered in low pressure sintering furnace using WC and Co mixed powders as raw materials were used to detect the magnetic saturation intensity and the ferrite content.Besides,the relationships of carbon content,magnetic saturation intensity and ferrite content value were investigated.The results indicate that the relationship of carbon content and ferrite content value is linear,thus,ferrite content can be considered to be used to represent carbon content.Since detecting method of test ferrite content is simple,it＇s a good way to give benefit to the improvement of the cemented carbide quality.
出处
《粉末冶金材料科学与工程》
EI
2010年第6期615-619,共5页
Materials Science and Engineering of Powder Metallurgy
基金
国家科技支撑计划资助项目(2007BAE05B02)
关键词
硬质合金
碳含量
磁饱和
铁素体测量法
cemented carbide
carbon content
magnetization saturation
ferrite measure method
