Preparation method of GH4169 high-temperature alloy tube blank

Abstract

The invention provides a preparation method of a GH4169 high-temperature alloy tube blank. The preparation method comprises the steps of manufacturing an electrode bar through adopting a vacuum induction melting method; after the electrode bar is subjected to surface polishing, putting the electrode bar into an electroslag remelting furnace to be subjected to electroslag remelting, so as to obtain an electroslag steel ingot; after cogging of the electroslag steel ingot, cutting and grinding defective parts, and putting the electroslag steel ingot into a forging heating furnace to be subjected to heat preservation forging; after ultrasonic nondestructive inspection of the electroslag steel ingot subjected to heat preservation forging, processing the electroslag steel ingot to obtain a bar material; processing through holes in the centers of the excircles at the two ends of the bar material; putting the bar material with the processed through holes into a heating furnace to be heated; carrying out three-roll piercing on the heated bar material through utilizing a three-roll cross-rolling piercer; and carrying out water cooling on the bar material subjected to three-roll piercing to the room temperature to form the GH4169 high-temperature alloy tube blank. Through utilization of the preparation method, the finished product rate of the tube blank can be increased.

Description

technical field [0001] The invention relates to the technical field of blank tube manufacturing, and more specifically, relates to a method for preparing a GH4169 superalloy tube blank. Background technique [0002] A typical process for low-cost mass production of seamless blank tubes is called hot piercing. After decades of unremitting efforts at home and abroad, at present, most solid-solution-strengthened superalloy materials can be successfully processed through this process, so that most solid-solution superalloys can be produced in batches at low cost. Various specifications of seamless pipe materials. Typical nickel-based superalloy materials are: GH3030, Inconel600, Inconel601, etc. [0003] Difficult-to-deform superalloys, usually mainly refer to precipitation-strengthened superalloys (such as GH4169, GH163, etc.) usually have excellent comprehensive performance, such as alloys with high high-temperature strength, excellent oxidation resistance and corrosion resi...

AI Technical Summary

Problems solved by technology

[0006] In view of the above problems, GH4169 is a typical precipitation-strengthened superalloy, and it is impossible to prepare seamless pipe blanks by common hot piercing methods, and can only be drilled through deep holes in bar materials; or deep holes first, and then hot extrusion Prepared seamless tube billets

Not only the preparation cycle is long and the cost is high, but also the finished product rate is very low, generally 30-40%

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