不同固-固掺杂工艺对氧化锆弥散强化钼合金性能的影响
Effect of Different Solid-Solid Doping Processes on the Properties of Zirconia Diffusion Strengthened Molybdenum Alloys
唐鑫鑫 1廖军 2卫茹 1杨晓青1
作者信息
- 1. 自贡硬质合金有限责任公司成都分公司,四川 成都 610100
- 2. 自贡硬质合金有限责任公司成都分公司,四川 成都 610100;自贡硬质合金有限责任公司,四川 自贡 643011
- 折叠
摘要
以氧化锆作为添加剂,采用粉末冶金法分别在二氧化钼和钼粉中固-固掺杂制备出了氧化锆弥散强化钼合金.分析对比了合金金相组织及微观结构的差异,并测试了不同掺杂工艺制备出的钼锆合金的抗拉强度、硬度以及再结晶温度.试验表明:采用不同的固-固掺杂工艺制备出的钼锆合金在力学性能、加工性能以及再结晶温度方面存在一定差异.在二氧化钼中掺杂氧化锆制备的钼锆合金经过一定程度塑性加工之后硬度、抗拉强度更高,加工硬化现象更明显,加工至ϕ0.68 mm丝材的再结晶温度约为1 400℃,比相同条件下在钼粉中添加氧化锆制备的钼锆合金再结晶温度提高约200℃左右,具备更好的高温力学性能.
Abstract
Zirconia dispersion strengthened molybdenum alloys were prepared by solid-solid doping in molybdenum dioxide and molybdenum powder,using zirconia as the additive by powder metallurgy.The differences in metallo-graphic organization and microstructure of the alloys were analyzed and compared,and the tensile strength,hard-ness and recrystallization temperature of the molybdenum-zirconium alloys prepared by different doping processes were tested.It is shown that the molybdenum-zirconium alloys prepared by different solid-solid doping processes have certain differences in mechanical properties,processability and recrystallization temperature.The molybdenum-zirconium alloy prepared by doping zirconia in molybdenum dioxide has higher hardness and tensile strength and more obvious work-hardening phenomenon after a certain degree of plasticity processing,and the recrystallization temperature of the processed ϕ0.68 mm wire is about 1 400℃ ,which is 200℃ higher than that of the molybde-num-zirconium alloy prepared by adding zirconia in molybdenum powder under the same conditions,it possesses better high-temperature mechanical properties.
关键词
固-固掺杂/钼锆合金/氧化锆/力学性能/再结晶温度Key words
solid-solid doping/molybdenum-zirconium alloys/zirconia/mechanical properties/recrystallization temperature引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据