摘要
对采用相同加工工艺制备的4种不同规格NbW合金棒材进行退火热处理、金相组织观察和室温力学性能的测试。实验数据表明合金的金相组织在热处理前后由锻造态的流线形向完全再结晶形态转变,1350℃是NbW合金最低再结晶温度。晶粒度随变形量的增加而减小,当Φ31棒材的变形量达到89.7%时晶粒度为43.55μm,同时抗拉强度值达到最大值505MPa,拉伸延伸率为最小值29.5%。
Niobium alloy bars with different diameters were obtained by forging process and annealed at 1 350℃. Metallurgical structure and mechanical property were also obtained using metalloscope and tensile test. The experimental results show that the grain size decreases when the predeformation increases, and the grain size reachs 43.55 μm when the predeformation increases to 89.7 %. NbW alloy bars whose diameter is 31 mm shows the lowest elongation 29.5 %,and the highest tensile strength 505 MPa.
出处
《硬质合金》
CAS
北大核心
2010年第2期102-106,共5页
Cemented Carbides
关键词
铌合金
变形度
金相组织
力学性能
Niobium Alloy
Predeformation
Metallurgical Structure
Mechanical Property
