Casting method of large size hole defect less TiA1 base alloy ingot

A base alloy, large-size technology, applied in the field of melting and casting of TiAl-based alloy ingots, can solve the problems of inability to accurately control the volatilization loss of low melting point elements, uneven composition of ingots, difficulty in obtaining ingots, etc., and achieve easy alloy composition accuracy , Guarantee the dosage of alloy components and improve the effect of yield
CN1718323AInactive Publication Date: 2006-01-11HARBIN INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HARBIN INST OF TECH
Publication Date
2006-01-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

A smelting-casting method for casting large-size TiAl-based alloy ingot without pores includes such steps as preparing consumable electrode of TiAl-based alloy by ISM technology, resmelting the TiAl-based alloy electrode and casting TiAl-based alloy ingot. It features high uniformity and large size.
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Description

Technical field:

[0001] The invention relates to a method for melting and casting a TiAl-based alloy ingot, in particular to a method for melting and casting a large-sized TiAl-based alloy ingot without hole defects. Background technique:

[0002] TiAl-based alloys are ideal high-temperature lightweight structural materials and are expected to be widely used in hot-end components in aerospace and automotive fields. An important way to obtain this alloy component is thermomechanical treatment, and its basic links include ingot casting + forging + machining. In order to improve processing efficiency, the demand for large-size TiAl-based alloy ingots is increasingly urgent. The material utilization rate of TiAl-based alloy ingots cast by direct casting is only 30%, and the rest has shrinkage cavities and porosity. The solidification characteristics and physical properties of TiAl-based alloys determine the difficulty of casting TiAl-based alloy ingots. The particularity of the...

Claims

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