A Combined Process of Thermal Spraying and Casting for Fixing Hard Wear-Resisting Coating on the Internal Surface of the Cast Products

热喷涂与铸造联合工艺在铸件内表面固定硬质耐磨涂层

• 批准号: 06650136
• 负责人: SHIMIZU Yasuo
• 金额: $ 1.34万
• 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: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06650136/
• 关键词: Surface Finishing; Internal Surface Coating; Fixing of the Coating; Combined Process of Thermal Spraving and Casting; High Velocity Oxgen-Fuel Flame Spraying; Core Component; Wear-Resisting Coating; WC-12%Co Coating; 耐摩耗皮膜; 鋳造; 皮膜固定化; 耐摩耗処理; サ

The aim of this research is to overcome the difficulty of internal surface spraying. Experimental investigational were carried out to develop a new technique in order to fix the hard wear-resisting coating on the internal surface of small holes such as cylinder wall in the cast products.Thermal spraying technology and casting technology were skillfully combined. The core components, previously coated hard wear-resisting coating by applying thermal spraying process, were builts in a casting mold. The desired coating such as WC-12%Co coating is left on internal surface of the hole on the cast product after removing just the core component from it. WC-12%Co coating produced by the process of high velocity oxygen-fuel flame(HVOF)spraying has a hardness above Hv900, therefore, it provides an effective wear-resisting property for protecting the surface of aluminum alloy cast products. Although HVOF spraying could not deposit the WC-12%Co coating directly on the surface of resin coated sand core, adoption of the supplemental aluminum underlay coating made it possible. Adhesive strengh of the WC-12%Co coating to the AC4B aluminum alloy cast products is 5-10 MPa in shear mode. It was improved to 10-20 MPa by applying overlay coating of Ni-10%Al alloy, preheating of the casting mold and by roughening the Ni-10%Al alloy overlay coating surface. Three kinds of overlay coating materials Ni-10%Al, Cu-10%Al and Zn were experimented. It was revealed that the overlay coating of Ni-10%Al alloy was most effective to strengthen the adherence between WC-12%Co coating and the cast AC4B body.

本研究的目的是克服内表面喷涂的困难。通过试验研究，将热喷涂技术与铸造技术巧妙地结合起来，开发出一种在铸件的缸壁等小孔内表面上固定硬质耐磨涂层的新工艺。核心部件采用热喷涂工艺涂覆硬质耐磨涂层，在铸造模具中成型。采用超音速火焰喷涂（HVOF）技术制备的WC-12%Co涂层，其硬度可达Hv 900以上，为铝合金铸件表面提供了有效的耐磨保护。HVOF喷涂虽然不能直接在覆膜砂芯表面存款WC-12%Co涂层，但通过添加铝涂层使其成为可能。WC-12%Co涂层与AC 4 B铝合金铸件的剪切结合强度为5-10 MPa。通过采用Ni-10%Al合金堆焊层、铸型预热和Ni-10%Al合金堆焊层表面粗糙化处理，使其抗拉强度提高到10-20 MPa。对Ni-10%Al、Cu-10%Al和Zn三种堆焊材料进行了堆焊试验。结果表明，Ni-10%Al合金堆焊层对提高WC-12%Co涂层与铸造AC 4 B基体的结合力最为有效。

项目成果

Yasuo SHIMIZU,Hirotoshi MAMIYA and Yoshiaki GOHDA: "Adhesion of the High Velocity Combustion Flame Sprayd Coatings to the Cast Substrate" Proceedings of 33rd Conference of the Shinetsu Branch of the Japan Society of Mechanical Engineers. 119-120 (1996)

Yasuo SHIMIZU、Hirotoshi MAMIYA 和 Yoshiaki GOHDA：“高速燃烧火焰喷涂涂层对铸造基材的附着力”日本机械工程师学会信越分会第 33 届会议论文集。

清水保雄,眞谷博敏,合田祥昭: "高速フレーム溶射皮膜と鋳造基材との接合" 日本機械学会北陸信越支部第33期講演会講演論文集. No.967-1. 119-120 (1996)

Yasuo Shimizu，Hirotoshi Maya，Yoshiaki Goda：“高速火焰喷涂涂层与铸造基材的接合”日本机械工程师学会北陆信越分会第33届年会论文集第967-1号。 -120 (1996))

清水保雄: "高速フレーム溶射皮膜と鋳造基材との接合" 日本機械学会北陸信越支部第33期講演会講演論文集. No.967-1. 119-120 (1996)

Yasuo Shimizu：“高速火焰喷涂和铸造基材的接合”日本机械工程学会北陆信越分会第33届年会论文集第967-120号（1996年）。

Yasuo SHIMIZU,Hirotoshi MAMIYA and Yoshiaki GOHDA: "Fixing Technology of the Spray Coating on the Internal Surface of Cast Products" Proceedings of 1995 Conference of the Hokuriku-Shinetsu Branch of the Japan Institute of Metals. 85-86 (1995)

Yasuo SHIMIZU、Hirotoshi MAMIYA 和 Yoshiaki GOHDA：“铸造产品内表面喷涂层的固定技术”日本金属学会北陆信越分会 1995 年会议论文集。

清水保雄: "製品孔内面への溶射皮膜の固定化" 日本金属学会北陸信越支部・日本鉄鋼協会北陸支部 平成7年度連合講演会概要集. 85-86 (1995)

Yasuo Shimizu：“产品孔内表面热喷涂涂层的固定”日本金属研究所北陆信越分部和日本钢铁研究所北陆分部1995年联合讲座摘要85-86（1995年） ）