Preparation method of gh625 superalloy tube billet

Abstract

The invention provides a preparation method of a GH625 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 a centering hole in the center of the excircle at one end of the bar material; putting the bar material with the processed centering hole 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 GH625 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 GH625 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 and solid-solution-strengthened superalloys with high W\Mo content (such as GH625, GH163, etc.) usually have excellent comprehensive performance, such as alloys with high high-temper...

AI Technical Summary

Problems solved by technology

[0006] In view of the above problems, GH625 is a typical solid-solution-strengthened superalloy, and it is impossible to prepare seamless tube 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 Prepare seamless pipe billet

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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