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GH4169 alloy wide and flat billet structure homogenization forging process

A GH4169, uniform structure technology, applied in the field of forging, can solve the problems of poor structure uniformity, surface elongation, poor consistency, etc., to achieve the effect of ensuring uniformity

Pending Publication Date: 2022-04-12
AVIC SHANGDA METAL REGENERATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The microstructure uniformity of the GH4169 alloy wide slab is closely related to the above properties, and the microstructure uniformity of the GH4169 alloy wide slab mainly depends on the forging process. The GH4169 alloy wide slab obtained by the conventional forging process has poor microstructure uniformity, core Problems such as coarse grains, elongated crystals on the surface, low performance and poor consistency

Method used

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  • GH4169 alloy wide and flat billet structure homogenization forging process
  • GH4169 alloy wide and flat billet structure homogenization forging process
  • GH4169 alloy wide and flat billet structure homogenization forging process

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A GH4169 alloy wide slab microstructure homogenization forging process, specifically comprising the following steps:

[0029] Step A, heating a GH4169 alloy steel ingot with a diameter of 508mm to 1110°C, holding the temperature for 2.5 hours to make the ingot evenly heated through, then taking it out of the furnace, drawing it, and forging it to 450mm octagonal, so as to obtain a fire-forged billet;

[0030] Step B, continue to heat the first-fire forging billet to 1110°C, keep it warm for 1.5 hours to make the steel ingot evenly heated, and then take it out of the furnace, first upsetting to φ570mm, then drawing and forging to 450mm octagonal to obtain the second-fire forging billet;

[0031] Step C, heating the second-fire forged billet to 1090°C, holding it for 1.5 hours to make the steel ingot evenly heated through, and then upsetting the steel ingot to φ570mm to obtain a third-fire forged billet;

[0032] Step D, heating the three-fire forged billet to 1080°C, hol...

Embodiment 2

[0035] A GH4169 alloy wide slab microstructure homogenization forging process, specifically comprising the following steps:

[0036] Step A, heating a GH4169 alloy steel ingot with a diameter of 508mm to 1120°C, holding the temperature for 2 hours to make the ingot evenly heated through, then taking it out of the furnace, pulling it out, and then forging it to 445mm octagonal, so as to obtain a fire forged billet;

[0037] Step B, continue to heat the first-fire forging billet to 1120°C, keep it warm for 1.5 hours to make the steel ingot evenly heated, and then take it out of the furnace, first upsetting to φ565mm, then drawing and forging to 445mm octagonal to obtain the second-fire forging billet;

[0038] Step C, heating the second-fire forged billet to 1110°C, holding it for 1.5 hours to make the steel ingot evenly heated through, and then upsetting the steel ingot to φ565mm to obtain a third-fire forged billet;

[0039] Step D, heating the three-fire forged billet to 1090...

Embodiment 3

[0042] A GH4169 alloy wide slab microstructure homogenization forging process, specifically comprising the following steps:

[0043] Step A, heating a GH4169 alloy steel ingot with a diameter of 508mm to 1100°C, holding the temperature for 2 hours to make the ingot evenly heated through, then taking it out of the furnace, drawing it, and forging it to 445mm octagonal, so as to obtain a fire forged billet;

[0044] Step B, continue to heat the first-fire forging billet to 1100°C, keep it warm for 2 hours to make the steel ingot evenly heated, and then take it out of the furnace, first upsetting to φ565mm, then drawing and forging to 445mm octagonal to obtain the second-fire forging billet;

[0045] Step C, heating the second-fire forged billet to 1080°C, keeping it warm for 2 hours to make the steel ingot evenly heated through, and then upsetting the steel ingot to φ565mm to obtain a third-fire forged billet;

[0046] Step D, heating the three-fire forged billet to 1070°C, hold...

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Abstract

The invention relates to the technical field of forging, in particular to a GH4169 alloy wide and flat billet structure homogenizing forging process, which comprises the following steps of: performing five-heating-number forging on a GH4169 alloy steel ingot, controlling the heating temperatures of a first heating number and a second heating number to be 1100-1120 DEG C, controlling the heating temperatures of a third heating number and a fourth heating number to be 10-20 DEG C lower than the forging temperature of the first heating number, and controlling the forging temperature of the third heating number and the fourth heating number to be 10-20 DEG C lower than the forging temperature of the first heating number; the heating temperature of the fifth heating number is 20-30 DEG C lower than that of the fourth heating number; the forging deformation of the first heating number is 15-20%, and the forging deformation of the second heating number to the fifth heating number is larger than or equal to 30%. According to the GH4169 alloy wide and flat blank forged through the forging technology, the core radius edge structure is uniform, the grade difference does not exceed the first grade, the mechanical property is excellent, and the mechanical properties in different directions are consistent.

Description

technical field [0001] The invention relates to the technical field of forging, in particular to a forging process for homogenizing the microstructure of a GH4169 alloy wide slab. Background technique [0002] GH4169 alloy is a Fe-Ni-Cr based deformed superalloy, which has excellent high-temperature mechanical properties, fatigue resistance, corrosion resistance and welding performance below 650 °C, and its microstructure and properties are stable in the temperature range of -253 to 700 °C. It is the most used deformed superalloy. The microstructure uniformity of the GH4169 alloy wide slab is closely related to the above properties, and the microstructure uniformity of the GH4169 alloy wide slab mainly depends on the forging process. The GH4169 alloy wide slab obtained by the conventional forging process has poor microstructure uniformity, core Coarse grains, elongated crystals on the surface, low performance and poor consistency. Contents of the invention [0003] In vi...

Claims

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Application Information

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IPC IPC(8): B21J5/08B21J1/06B21J5/00
Inventor 张震栾吉哲李爱民田水仙刘猛李本朋
Owner AVIC SHANGDA METAL REGENERATION TECH
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