Development of Heat- and Wear-resisting Light Alloy Based Composite Produced by Applying Graded Thermal Spraying Technology

分级热喷涂耐热耐磨轻合金基复合材料的研制

• 批准号: 02650056
• 负责人: SHIMIZU Yasuo
• 金额: $ 0.13万
• 依托单位: Shinshu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02650056/
• 关键词: Thermally Sprayed Alloy Composite; Carbide Cermet Material Coating; High velosity Flame Spraying; Magnesium Based Alloy; Graded Coating; Wear resistance; Heat Resistance; Diffusion Heat Treatment; 炭化物サ-メット; 傾斜組成皮膜; アルミニウム溶射; 複合炭化物合金溶射; マグネシウム基

Three types of thermal spraying processes were applied to fabricate an excellent heat- and wear-resisting magnesium alloy based composite. The spraying methods. experimentally assessed were conventional flame spraying, plasma spraying and high velocity oxgen/fuel (HVOF) flame spraying, respectively. Such cermet materials consisting of either system of NI-WC, WC-CO or Cr_3C_2-Co were sprayed on the surface of the magnesium alloy AZ31 substrate. Aluninum under coating was precedently applied before the cermet sprayings to enhance the bond strength between the cermet coatings and the substrate AZ31. Furthermore, diffusion heat treatment was introduced following the cermet sprayings to increase the adhesiveness of the coatings.The HVOF spraying gained the highest bond strength, density, hardness and wear resistance. Vickers hardness of the WC-12%Co cermet coating produced by the HVOF spraying reached to 800 - 1200. The alloy composite with the HVOF sprayed WC-12%Co cermet coating was superior above 20 times in abrasive wear resistance to hardened S45C steel. The HVOF spraying process allows to take place with little decarburization of the carbide phases and is expected to be applicable for fabrication of new excellent light alloy based composites.

采用三种热喷涂工艺制备了一种性能优良的耐热耐磨镁合金基复合材料。喷涂方法。实验评估分别为常规火焰喷涂、等离子喷涂和高速氧/燃料（HVOF）火焰喷涂。将NI-WC体系、WC-CO体系和Cr_3C_2-Co体系组成的陶瓷材料喷涂在镁合金AZ31基体表面。为了提高涂层与基体AZ31的结合强度，在金属陶瓷喷涂前先涂覆铝。此外，在金属陶瓷喷涂后引入了扩散热处理，以增加涂层的附着力。HVOF喷涂获得了最高的结合强度、密度、硬度和耐磨性。HVOF喷涂制备的WC-12%Co合金涂层的维氏硬度达到800 ~ 1200。经HVOF喷涂WC-12%Co金属陶瓷涂层的合金复合材料的磨料耐磨性比淬硬S45C钢高20倍以上。HVOF喷涂工艺可以在碳化物相脱碳很少的情况下进行，有望应用于制造新的优质轻合金基复合材料。

项目成果

清水 保雄: "HVOFによるマグネシウム基材へのWCーCo溶射" 溶接新報(業界新聞). 272. 18 (1992)

Yasuo Shimizu：“使用 HVOF 在镁基体上热喷涂 WC-Co”《焊接报》（行业报纸）272. 18 (1992)。

清水 保雄: "HVOFによるマグネシウム基材へのWCーCo溶射" 日本溶射協会第54回学術講演大会講演論文集. 135-140 (1991)

Yasuo Shimizu：“使用 HVOF 在镁基材上热喷涂 WC-Co”日本热喷涂协会第 54 届学术会议记录 135-140 (1991)。

Yasuo Shimizu: "High Velocity Flame Spraying of WC-Co Coating onto Magnesium Alloy Substrate" Proceedings of 52nd Conference of Japan Thermal Spraying Society. 135-140 (1991)

Yasuo Shimizu：“镁合金基材上WC-Co涂层的高速火焰喷涂”日本热喷涂学会第52届会议论文集。

Yasuo Shimizu: "WC-Co Cermet Coating onto Magnesium Alloy Substrate by HVOF Spraying Process" The Welding New Report (Business News Paper). 18 (1992)

Yasuo Shimizu：“通过 HVOF 喷涂工艺在镁合金基材上涂覆 WC-Co 金属陶瓷涂层”焊接新报告（商业新闻报纸）。