摘要
以WC-9Ni-0.57Cr硬质合金为研究对象,采用失重法、电化学测试、力学性能测试和显微形貌分析等方法,研究合金在3.5%NaCl模拟海水溶液中的腐蚀行为,并与传统的WC-6Co硬质合金进行了比较。结果表明:在3.5%NaCl溶液中室温腐蚀8周的WC-9Ni-0.57Cr合金与WC-6Co合金的腐蚀速率分别为0.0033mm/a和0.0072mm/a,以Ni-Cr为粘结相制备的硬质合金耐腐蚀性能明显优于传统的WC-Co硬质合金,具有较强的抗腐蚀能力;硬质合金微观腐蚀形态表现为粘结相的腐蚀,使力学性能降低,室温腐蚀4周后WC-9Ni-0.57Cr合金与WC-6Co合金的横向断裂强度损失率分别为8.43%和31.14%。
The corrosion behavior of WC 9Ni 0.57Cr cemented carbide in 3.5% NaCl simulated seawater solution was investigated by immersion test, electrochemistry test, mechanical property test and SEM analysis. The results show that the corrosion rate of WC-9Ni-0. 57Cr and WC-6Co cemented carbide were 0. 0033mm/a and 0. 0072mm/a respectively after immersed in the 3.5% NaCl solution for 8 weeks at room temperature. WC-9Ni-0. 57Cr cemented carbide has good capability of corrosion prevention compared to WC-6Co cemented carbide. It showed that bonding phase has corrosion and trend of mechanical property drop is resulted. The reduction rate of strength of WC-9Ni 0.57Cr and WC-6Co cemented carbide were 8.43% and 31.14% respectively after immersed in the 3.5% NaCl solution for 4 weeks at room temperature.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2008年第5期750-753,789,共5页
Journal of Materials Science and Engineering
基金
中南大学博士后基金资助项目
