Mold and manufacturing method thereof, and molded article using the mold
a manufacturing method and mold technology, applied in the direction of manufacturing tools, foundry molds, manufacturing tools, etc., can solve the problems of reducing productivity and increasing production costs, and achieve the effects of reducing the occurrence of cases, good surface state, and excellent
Inactive Publication Date: 2010-06-17
IHI CORP +1
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- Description
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- Application Information
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Benefits of technology
The present invention provides an inexpensive mold for manufacturing molded articles of titanium-aluminum alloys or titanium alloys that has low reactivity with molten alloys and can inhibit the reaction between the mold and the alloy. The mold is made of a ceramic and mainly comprises a filler and a binder for increasing bonding between the filler particles. The mold is designed to have low reactivity with titanium-aluminum alloys and titanium alloys, and can be used for manufacturing molded articles with high efficiency and low cost.
Problems solved by technology
Therefore, where the a case layer is too thick, a long time is required for chemical milling or mechanical cutting, causing increase in production cost and decrease in productivity.
Method used
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Embodiment Construction
[0059]Colloidal silica (silica sol) has been used as a binder for casting molds for Ni-based alloys, Co-based alloys, and Fe-based alloys. Silica sol features chemical stability (low activity), low industrial cost, and a high strength from room temperature to a high temperature. However, silica sol is highly reactive with titanium-aluminum alloys and titanium alloys. For this reason, silica sol has been conventionally considered unsuitable for use as a binder for molds for titanium-aluminum alloys and titanium alloys.
[0060]However, the results of a keen study performed by the inventors demonstrated that by adjusting the constituent materials of a filler for a mold for a titanium-aluminum alloy or a titanium alloy, it is possible to prevent a vigorous reaction with the titanium-aluminum alloy or titanium alloy even when silica sol is used as a binder.
[0061]One preferred embodiment of the present invention will be described below with reference to the appended drawings.
[0062]A cross s...
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Abstract
The object of the present invention is to provide a mold which has low reactivity with molten alloys and which is inexpensive, a method for manufacturing the same and a molded article using the mold. A mold 40 in accordance with the present invention serves for manufacturing a molded article 60 of a titanium-aluminum alloy or a titanium alloy. At least an initial layer 44a of a cavity surface 43 of a mold body 41 constituting the mold 40 is formed of a calcined product of a slurry comprising a filler having cerium oxide as a main component and a binder having silica sol as a main component.
Description
CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is a Divisional Application of Non-Provisional application Ser. No. 12 / 065,692 entitled “Mold and Manufacturing Method Thereof, and Molded Article Using the Mold” to Kazuyoshi Chikugo, et al. filed Mar. 4, 2008 claiming priority to International Patent Application No. PCT / JP2006 / 317771 filed on Sep. 7, 2006 and Japanese Patent Applications 2005-259218 filed Sep. 7, 2005 and 2005-259219 filed Sep. 7, 2005 and incorporates by reference the subject matter of all of the above-identified applications.TECHNICAL FIELD[0002]The present invention relates to a mold used for manufacturing a molded article of a titanium-aluminum alloy or a titanium alloy, a method for manufacturing the same, and a molded article using the mold.BACKGROUND ART[0003]Titanium-aluminum alloys composed of titanium aluminide (TiAl), which is an intermetallic compound of Ti and Al have features such as small weight and high strength. For this reason, titaniu...
Claims
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IPC IPC(8): B22C9/02
CPCB22C1/06B22D21/005B22C9/04B22C1/186B22C1/00B22C1/08B22D21/02
Inventor CHIKUGO, KAZUYOSHISATO, SHIGEYUKI
Owner IHI CORP