Rolling and cogging method for high-temperature alloy GH1015

A high-temperature alloy and production method technology, applied in the direction of metal rolling, etc., can solve the problems of not meeting the demand for GH1015 alloy rods, large consumption of metal raw materials, and high metallurgical manufacturing costs, and achieve convenient production organization, reduced metallurgical manufacturing costs, and excellent surface quality. good quality effect

Inactive Publication Date: 2005-02-23
宝钢特钢有限公司
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AI Technical Summary

Problems solved by technology

[0004] The traditional GH1015 high-temperature alloy ingot hot-working blanking process relies on forging. It adopts "φ360~φ430mm electroslag ingot → thermal processing of multiple fires in the forging press, and the blank is formed into a 130-140mm alloy billet". Its characteristics are:

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  • Rolling and cogging method for high-temperature alloy GH1015

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[0020] specific implementation plan

[0021] A steel company implements the patent of the invention, adopts the hot-processing blanking process of heating electroslag ingots in a soaking furnace + second-fire rolling in a blooming mill, and makes high-temperature alloy GH1015 electroslag ingots with a diameter of 300 to 500 mm (single weight 1.5 to 2.5 tons) The billet is rolled and opened into a 120-180mm alloy billet, now take "Φ430mm electroslag ingot (single weight 2 tons) → 140mm alloy billet" as an example. During the first fire rolling of the blooming mill, the alloy ingot is heated by the soaking furnace: (A) the furnace temperature of the alloy ingot is 670°C, and it is kept for 1 hour; (B) the temperature is raised to 880-910°C at a rate of 55-60°C / h ℃, keep warm for 1 hour; (C) heat up to 1180°C at a rate of 75-80°C / h; (D) after 2 hours of heat preservation, turn the alloy ingots one by one, and keep the turned alloy ingots for 1 hour and 15 minutes (E) The tempera...

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Abstract

A rolling cogging manufacturing method for high temperature alloy GH1015 includes: 1) heating in one heat, electroslag ingot keeping temperature for 1 hr with entering furnace temperature is less than or equal to 700deg.C, keeping temperature for1 hr with is less than or equal to 60deg.C/h up to 900deg.C, keeping temperature for 3.5 hrs with is less than or equal to 80deg.C/h up to 1180deg.C and drawing charge with positive and negative face temperature differential is less than or equal to 20deg.C; 2) cogging in one heat with preheating temperature of roller 120deg.C and beginning temperature is greater than or equal to 1100deg.C, finishing temperature is greater than or equal to 1000deg.C, roller speed is less than or equal to 20/min, drafts is less than or equal to 30mm and rolling passage is less than or equal to 15; 3) heating in second heat, keeping temperature for 80 mins at 1170deg.C and drawing charge with positive and negative face temperature differential is less than or equal to 20deg.C; 4) cogging in second heat and roller preheating with beginning temperature is greater than or equal to 1100deg.C, finishing temperature is greater than or equal to 1000deg.C, rolling speed is less than or equal to 20/min, rolling speed of product passage is less than or equal to 10/min and drafts 30mm. It achieves low cost, simple process and good quality.

Description

technical field [0001] The invention relates to a production method of thermal processing blanking of a superalloy in the metallurgical industry, in particular to a production method of thermal processing blanking of a solid-solution-strengthened iron-based superalloy. Background technique [0002] Superalloys are important metal materials necessary for modern aero-engines and rocket engines. It can be used for a long time under high-temperature (generally 600-1000°C) oxidizing atmosphere and gas corrosion conditions under greater stress. Superalloys can generally be divided into iron-based superalloys and nickel-based superalloys; iron-based superalloys can generally be divided into solid solution-strengthened iron-based superalloys and aging-strengthened iron-based superalloys. [0003] Superalloy GH1015 is a solid solution strengthened iron-based superalloy, which is mainly used for the mounting edge of aero-engine flame tubes working below 900 °C. GH1015 is a variety n...

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Application Information

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IPC IPC(8): B21B1/00B21B3/00C21D8/00
Inventor 葛宪平沈燕源顾新根谢伟金海忠金鑫张培德
Owner 宝钢特钢有限公司
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