Comparative Study on Casting Properties of One-chamber Pressure Type and Two-chamber Pressure Type by Titanium Flow Observation

钛流观察一室压型与二室压型铸造性能对比研究

• 批准号: 06454553
• 负责人: WATANABE Kouichi
• 金额: $ 3.52万
• 依托单位: Niigata University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 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-06454553/
• 关键词: Titanium casting; Flow; pressure casting machine; Casting defect; Permiability; 全方向加圧鋳造機

To clear the difference in casting properties between one-chamber pressure machine and two-chamber pressure machine, titanium flow in various cavities was investigated by the tracer element molten method which is one of flow visualization techniques developed in this research. Casting defects were also checked by X-ray transparent photographs.The summary of the obtained results is shown below.1.The inflow of the one chamber type was presumed to be faster than the two chamber type, which is due to the higher pressure and its quick operation.2.In thick cavity, turbulent flow sometimes occured and in such a case many large internal defects generated because solidification shell finished later than that of laminar flow. (onechamber type)3.In thin cavity, external defect occured because the filling times was longer than that of pressure elevation in cavity due to diffusion of argon. (one chamber type)4.As a result in the case of one chamber type, investments with high permeability cause many internal defects in thick plate castings and external defects on thin plate castings and mesh castings. Those defects closely related to the flow in the cavity. Low permeable investment caused few casting defects in spite of cavity type.

为了明确单腔压铸机和双腔压铸机在铸造性能上的差异，采用本研究开发的流动可视化技术之一示踪元素熔融法对钛在不同腔内的流动进行了研究。铸造缺陷也通过x射线透明照片检查。所得结果的摘要如下所示。假定单室型的流入速度比双室型快，这是由于压力更高，运行速度快。在厚腔中，有时会发生湍流，这种情况下由于凝固壳比层流晚完成而产生许多较大的内部缺陷。(onechamber类型)3。在薄型空腔中，由于氩气的扩散，填充时间比空腔内压力提升时间长，从而产生外部缺陷。（单腔型）因此，在一腔型的情况下，高渗透性的熔模在厚板铸件中造成许多内部缺陷，在薄板铸件和网状铸件中造成许多外部缺陷。这些缺陷与腔内的流动密切相关。低渗透熔模对铸造缺陷的影响较小。

项目成果

Watanabe Kouichi et al.: "Study on the One Chamber Pressure Casting Machine for Titanium Part 2 Influence of the Mold Permeability on Casting Defects" Japanese Society for Dental Materials and Devices. 14-6. 668-676 (1995)

Watanabe Kouichi 等人：“钛单室压力铸造机的研究第 2 部分模具渗透性对铸造缺陷的影响”日本牙科材料与装置学会。

Watanabe Kouichi et al.: "Study on the One Chamber Pressure Casting Machine for Titanium Part 1 Relation between Casting Properties and the Applied Pressure" Japanese Society for Dental Materials and Devices. 14-4. 378-386 (1995)

Watanabe Kouichi 等人：“钛单室压力铸造机的研究，第 1 部分：铸造性能与施加压力之间的关系”，日本牙科材料与器械学会。

渡辺孝一,他: "初期凝固層によるチタン湯流れの時間変化" 歯科材料・器械. 14. 52-58 (1995)

Koichi Watanabe 等人：“由于初始凝固层导致钛流动的时间变化”《牙科材料和仪器》14. 52-58 (1995)。

渡辺孝一,他: "一室加圧型チタン鋳造機に関する研究 第1報 圧力の作用原理と鋳込み特性との関係" 歯科材料・器械. 14. 378-386 (1995)

Koichi Watanabe 等人：“单室加压钛铸造机的研究，第 1 部分：压力作用原理与铸造特性之间的关系”《牙科材料和器械》14. 378-386 (1995)。

渡辺孝一,他: "一室加圧型チタン鋳造機に関する研究 第2報 鋳型通気性が鋳造欠陥に及ぼす影響" 歯科材料・器械. 14. 668-676 (1995)

Koichi Watanabe 等人：“单室加压钛铸造机的研究第 2 部分：模具通风对铸造缺陷的影响”牙科材料和仪器 14. 668-676 (1995)。