Title:
【発明の名称】チクソキャスティング法
Document Type and Number:
Japanese Patent JP2869889
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a thixocasting method by which a high-strength Al alloy casting is obtainable. SOLUTION: An Al-Si alloy material which has a hypo-eutectic compsn. and in which the first peak-shaped endothermic part (b) by eutectic dissolution and the second peak-shaped endothermic part (c) by dissolution of the component of the m.p. higher than the m.p. of the eutectic point in a differential thermal analysis curve (a) is subjected to a heat treatment to prepare the half-molten Al-Si alloy material in which a solid phase and a liquid phase coexist in this thixocasting method. The packing of the half-molten Al-Si alloy material into the cavity of a casting mold and the subsequent solidification of the half-melted Al-Si alloy material are then executed under pressurization. The casting temp. T of the half-melted Al-Si alloy material is set at T1 <=T<=T2 when the temp. of the elevation start point (d) of the first peak-shaped endothermic part (b) is defined as T1 and the temp. at the falling end point (e) thereof as T2 . As a result, the fine crystallization of the primary crystal Si phase is embodied and the strength of the Al alloy casting is enhanced.
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Inventors:
SAITO NOBUHIRO
SHIINA HARUO
NAKAMURA TAKEYOSHI
SHIINA HARUO
NAKAMURA TAKEYOSHI
Application Number:
JP30817595A
Publication Date:
March 10, 1999
Filing Date:
November 01, 1995
Export Citation:
Assignee:
HONDA GIKEN KOGYO KK
International Classes:
B22D46/00; B22D17/00; B22D17/32; B22D27/04; C22C1/02; C22C21/02; (IPC1-7): B22D17/00; B22D17/32; B22D27/04; B22D46/00; C22C1/02; C22C21/02
Domestic Patent References:
| JP985409A | ||||
| JP8192257A | ||||
| JP8112661A | ||||
| JP7100570A | ||||
| JP5200523A | ||||
| JP5312740A |
Other References:
【文献】特許27947539(JP,B2)
Attorney, Agent or Firm:
Ken Ochiai (1 person outside)