| 248 | 0 | 53 |
| 下载次数 | 被引频次 | 阅读次数 |
首次采用搅拌摩擦加工(FSP)对CuCr30合金进行了加工,对比研究了FSP前后CuCr30合金的微观组织和电弧烧蚀性能。结果表明,母材中,Cu、Cr两相晶粒尺寸分别为3.56～34.16μm和4.77～32.36μm;FSP后,Cu、Cr两相晶粒尺寸分别细化为40～500nm和50～329nm。经过30次和100次击穿实验后,FSP试样的质量损失比母材分别降低了77.8%和39.2%。击穿100次后,母材和FSP试样的烧蚀面积分别为6.91和8.01mm2,表明FSP试样中细化的Cr相分散了电弧能量,使得烧蚀区域均匀、分散,从而提高了CuCr30合金的电弧烧蚀性能。
Abstract：CuCr30 alloy was processed by friction stir processing(FSP) for the first time. The comparative study of microstructure and arc ablationperformance of CuC r30 alloy before and after FSP was carried out. The results show that the grain sizes of Cu and Cr phases in base meta l are 3. 56-34. 16 μm and 4. 77-32. 36 μm, respectively. After FSP, the grain sizes of C u and Cr phases are refined to 40-500 nm and50-329 nm, respectively. Compared with the base metal, the mass loss of the FSP samplesafter 30 and 100 times of vacuum breakdown exp eriments is reduced by 77. 8% and 39. 2%, respectively. The ablation areas of the base metal and FSP samples after 100 times of vacuum breakdown experiments are 6. 91 and 8. 01 mm2, respectively, which indicates that the refined Cr phase in the FSP samples disperses thea rc energy, resulting in the ablation area being uniform and scattered, and thus improving the arc ablation performance of CuCr30 alloy.
[1]ZHU S,LIU Y,TIAN B,et al.Arc erosion behavior and mechanism of Cu/Cr20 electrical contact material[J].Vacuum,2017,143:129-137.
[2]MAITI K,ZINZUWADIA M,NEMADE J.Preparation and characterization Cu-Cr contact material and study their hardness and conductivity[J].Advanced Materials Research,2012,585:250-254.
[3]MA Y Q,LIN H J,SONG D D.Microstructure evolution and thermal physical properties of CuCr alloy after high pressure treatment[J].Rare Metals,2014,33(3):293-298.
[4]HAN J R,DOU Z H,ZHANG T A,et al.Progress in the preparation of large-size high-performance CuCr alloys[J].Advances in Materials Science and Engineering,2022,2022:1-18.
[5]WEI X,YU D,SUN Z,et al.Effect of Ni addition on the dielectric strength and liquid phase separation of Cu-Cr alloys during the vacuum breakdown[J].Vacuum,2014,109:162-165.
[6]ZHANG L,YU G,LI S,et al.The effect of laser surface melting on grain refinement of phase separated Cu-Cr alloy[J].Optics&Laser Technology,2019,119:238-241.
[7]SUN Y,RONG Z,GUAN S.Surface solid-state amorphization of accumulative roll bonded Cu-Zr laminates by friction stir processing[J].Materials Letters,2020,279:128518.
[8]BHEEKYA N R,VENKATESWARA R K.Madhusudhan reddy G,et al.Development of high-strength and high-electrical conductivity Cu-Zr alloy through friction stir processing[J].Transactions of the Indian Institute of Metals,2019,72(6):1431-1435.
[9]WANG Y,FU R,LI Y,et al.A high strength and high electrical conductivity Cu-Cr-Zr alloy fabricated by cryogenic friction stir processing and subsequent annealing treatment[J].Materials Science and Engineering:A,2019,755:166-169.
[10]SHAO Q,GUO J,CHEN J,et al.Atomic-scale investigation on the structural evolution and deformation behaviors of Cu-Cr nanocrystalline alloys processed by high-pressure torsion[J].Journal of Alloys and Compounds,2020,832:1-10.
[11]ZHANG Q,LIANG S,ZHUO L.Fabrication and properties of the W-30wt%Cu gradient composite with W@WC core-shell structure[J].Journal of Alloys and Compounds,2017,708:796-803.
[12]YANG X,ZHAO Y,KANG D,et al.The vacuum breakdown properties and arc erosion behaviors of CuTiW alloys[J].Engineering Failure Analysis,2020,118:104865.
[13]XIE H,GUAN W,LüH,et al.CuCr/Cu contact material fabricated via high-speed laser cladding[J].The International Journal of Advanced Manufacturing Technology,2022,124:397-410.
[14]WANG L,ZHANG X,WANG Y,et al.Simulation of cathode spot crater formation and development on CuCr alloy in vacuum arc[J].Physics of Plasmas,2018,25(4):043511.
基本信息:
中图分类号:TG146.11
引用信息:
[1]谢海瑞,刘强,王文,等.搅拌摩擦加工CuCr30合金微观组织及电弧烧蚀性能研究[J].塑性工程学报,2024(02):91-96.
基金信息:
西安市先进制造业技术攻关项目(21XJZZ0033); 国家自然科学基金优秀青年科学基金资助项目(52222410); 陕西省杰出青年科学基金资助项目(2022JC-24)
2024-02-28
2024-02-28
2024-02-28