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| ZrH2对AgCuTi钎料润湿性及PCBN/YG8异质接头性能的影响 |
| Effect of ZrH2 on the Wettability of AgCuTi Brazing Metal and the Properties of PCBN/YG8 Brazed Joint |
| Received:December 10, 2024 |
| DOI：10.3969/j.issn.1674-6457.2025.03.005 |
| 中文关键词: ZrH2 吸热峰 润湿角 微观组织 剪切强度 |
| 英文关键词: ZrH2 endothermic peaks wetting angle microstructure shear strength |
| 基金项目:河南省科技研发联合基金(重点项目)(225200810013);浙江省“尖兵”“领雁”研发攻关计划(2024C01086) |
| Author Name | Affiliation | | WANG Hongna | Ningbo Songlan Cutting Tools Technology Co., Ltd., Zhejiang Ningbo 315700, China | | JIU Yongtao | Ningbo Songlan Cutting Tools Technology Co., Ltd., Zhejiang Ningbo 315700, China | | ZHANG Lei | Ningbo Songlan Cutting Tools Technology Co., Ltd., Zhejiang Ningbo 315700, China | | LU Quanbin | State Key Laboratory of High Performance & Advanced Welding Materials, China Academy of Machinery Zhengzhou Research Institute of Mechanical Engineering Co., Ltd., Zhengzhou 450001, China | | DING Zongye | State Key Laboratory of High Performance & Advanced Welding Materials, China Academy of Machinery Zhengzhou Research Institute of Mechanical Engineering Co., Ltd., Zhengzhou 450001, China | | XIA Yueqing | State Key Laboratory of High Performance & Advanced Welding Materials, China Academy of Machinery Zhengzhou Research Institute of Mechanical Engineering Co., Ltd., Zhengzhou 450001, China |
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| 中文摘要: |
| 目的 研究加入微量氢化锆对银铜钛钎料的影响。方法 采用同步热分析仪研究钎料的熔点变化趋势，采用影像测量仪研究氢化锆对银铜钛钎料在PCBN/YG8上的润湿角的影响规律，采用扫描电镜、电子万能试验机分析测试异质接头微观组织和剪切强度的变化规律。结果 在AgCuTi钎料中加入微量ZrH2后，钎料熔点呈现下降趋势，钎料第2个吸热峰由786 ℃下降至0.5% (质量分数) ZrH2时的782 ℃。钎料在PCBN/YG8上的润湿角和钎焊接头剪切强度均呈现先升高后降低的趋势，异质接头显微组织中铜基固溶体部分产生细化现象，2种固溶体由片层状变为网状。当在AgCuTi钎料中添加0.3%(质量分数)的ZrH2时，钎料在YG8/ PCBN上的润湿角由未添加时的23°/41°降低至17°/13°，当在AgCuTi钎料中添加ZrH2后，钎料热流量为−116.4 J/g，钎料与母材界面反应最剧烈，故钎料在2种母材上的润湿角降低。当采用AgCuTi0.3%ZrH2钎料时，钎焊PCBN/YG8接头的剪切强度由119.83 MPa提高至167.43 MPa，分析原因为ZrH2的加入抑制了Ti与PCBN的反应，促进了Ti与YG8的反应，在YG8一侧生成TiCo金属间化合物相，提高了界面结合强度。结论 添加氢化锆的银铜钛钎料的润湿性及异质接头强度均优于未添加的钎料性能。 |
| 英文摘要: |
| The work aims to study the effect of the addition of trace zirconium hydride on silver-copper-titanium brazing metal. The melting point of brazing metal was studied by synchronous thermal analyzer, the effect of brazing metal on the wetting angle of PCBN/YG8 was studied by imaging measuring instrument, and the change law of microstructure and shear strength of heterogeneous joints was analyzed and tested by scanning electron microscope and electronic universal testing machine. When a trace amount of ZrH2 was added to AgCuTi brazing metal, the melting point of the brazing metal decreased, and the second endothermic peak of the brazing metal decreased from 786 ℃ to 782 ℃ at 0.5%ZrH2. The wetting angle of the brazing metal in PCBN/YG8 and the shear strength of the brazing joint increased firstly and then decreased, and the copper-based solid solution in the microstructure of the heterogeneous joint was refined, and the two solid solutions changed from lamellar to reticulated. When 0.3% ZrH2 was added to AgCuTi brazing metal, the wetting angle of the brazing metal on YG8/PCBN decreased from 23°/41° to 17°/13° when the brazing metal was not added, and the heat flow rate of the brazing metal was −116.4 J/g after ZrH2 was added to the AgCuTi brazing metal, and the interface reaction between the brazing metal and the base metal was the most violent, and the wetting angle of the solid brazing metal on the two base metals decreased. The shear strength of brazed PCBN/YG8 joints with AgCuTi 0.3%ZrH2 brazing metal increased from 119.83 MPa to 167.43 MPa, and the cause was that the addition of ZrH2 inhibited the reaction between Ti and PCBN, promoted the reaction between Ti and YG8, and generated TiCo intermetallic phase on the YG8 side, which improved the interfacial bonding strength. The wettability and strength of heterogeneous joints of AgCuTi brazing metal with zirconium hydride are better than those without zirconium hydride. |
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