Rheocast of lead-free bismuth bronze and phosphorus bronze utilizing high fluidity slurry manufactured by repeated extrusion process
利用重复挤压工艺制造的高流动性浆料流变铸造无铅铋青铜和磷青铜
基本信息
- 批准号:17560653
- 负责人:
- 金额:$ 2.18万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:2005
- 资助国家:日本
- 起止时间:2005 至 2006
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Semi-solid slurry with fine solid granules for rheocasting was made from lead-free bismuth bronze and phosphorus bronze by passing the low-superheat melt through an opening between a rotating regular octagonal rotor and a circumscribed chill block. At first, we mainly investigated the effect of rotational speed on the structure of a solidified small ingot of lead-free bismuth bronze. The ingot structures changed from the dendrite of rotor-free condition to the rosette at the rotational speed of 50rpm and to the granular with a mean grain size of about 50μm at higher than100rpm. If the slurry made at 100rpm was rheocast to a disk shape by the use of a high pressure casting machine, the disk had almost uniform granular structures from the center to the edge regions. However, the tensile elongation and strength were very low because of the existence of brittle fine dendrite-like structure regions which were generated by rapid cooling of liquid phases during rheocasting. They were drastically improved by lowering cooling rate to suppress the generation of fine dendrite structure regions, especially in the elongation showing much higher than that of conventional squeeze cast sample. On the other hand, the rotor process also produced semi-solid slurry phosphorus bronze with mean granule size of less than 40μm at almost the same processing conditions. When rheocasting utilizing the semi-solid slurry had been carried out at slower cooling rate, the formed sample had a fine grain structure with mean grain size of 30μm. We expect this reocast sample of phosphorus bronze have an excellent tensile property especially in the much higher elongation than that of the conventional castings.
通过旋转的常规八角形转子和围层的固体固定颗粒的固体颗粒,首先是固体的固体颗粒。在50粒的旋转速度至颗粒状的旋转速度下,平均晶粒大小在高100rpm处,如果在100rpm处制造的浆液,则是磁盘均通过高压铸造机均匀的从中央到边缘的颗粒结构。伸长式阳离子的高度高于凸形的刺激样品。尤其是在转换铸件的更高高伸长率中。
项目成果
期刊论文数量(6)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
SLEEMによるCu-Zn合金における板状α相の観察
Cu-Zn合金中片状α相的SLEEM观察
- DOI:
- 发表时间:2005
- 期刊:
- 影响因子:0
- 作者:松田健二;I.Mullerova;L.Frank;川畑常眞;上谷保裕;池野 進
- 通讯作者:池野 進
New quaternary grain boundary precipitate in Al-Mg-Si alloy containing silver
- DOI:10.1016/j.scriptamat.2006.03.064
- 发表时间:2006-07
- 期刊:
- 影响因子:6
- 作者:K. Matsuda;S. Ikeno;Tatsuo Sato;Y. Uetani
- 通讯作者:K. Matsuda;S. Ikeno;Tatsuo Sato;Y. Uetani
523Kで焼鈍したCu-Zn-Si合金の高分解能透過型電子顕微鏡観察
523K退火Cu-Zn-Si合金的高分辨率透射电子显微镜观察
- DOI:
- 发表时间:2006
- 期刊:
- 影响因子:0
- 作者:池野 進;松田健二;浜谷大介;川畑常眞;上谷保裕
- 通讯作者:上谷保裕
Effect of Polygonal Rotor Process on solidification Structure of Lead-free Bismuth Bronze
多角转子工艺对无铅铋青铜凝固组织的影响
- DOI:
- 发表时间:2010
- 期刊:
- 影响因子:0
- 作者:T.Kose;Y.Uetani;K.Nakajima;K.Matsuda;S.Ikeno
- 通讯作者:S.Ikeno
機械撹拌による半凝固AI-10%Mg合金ビレットの半連続鋳造と半溶融押出加工
机械搅拌半固态AI-10%Mg合金坯的半连续铸造和半熔融挤压
- DOI:
- 发表时间:2005
- 期刊:
- 影响因子:0
- 作者:上谷保裕;末田博之;高木英俊;松田健二;池野 進
- 通讯作者:池野 進
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UETANI Yasuhiro其他文献
UETANI Yasuhiro的其他文献
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{{ truncateString('UETANI Yasuhiro', 18)}}的其他基金
Development of new continuous casting process of casting crack-free aluminum alloys by utilizing semi-solid slurries
利用半固态浆料铸造无裂纹铝合金连铸新工艺的开发
- 批准号:
23560895 - 财政年份:2011
- 资助金额:
$ 2.18万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Rheo-extrusion of high-strength aluminum alloys using semi-solid slurry made by solidification-rate controlling technique
凝固速率控制半固态浆料流变挤压高强度铝合金
- 批准号:
15560644 - 财政年份:2003
- 资助金额:
$ 2.18万 - 项目类别:
Grant-in-Aid for Scientific Research (C)