A method for compensating heating assisted free forging to produce difficult-to-deform nickel-based superalloys

A technology of nickel-based superalloy and compensatory heating, which is applied in the field of superalloy manufacturing, can solve the problems of narrow thermal processing temperature range, and achieve the effects of facilitating recrystallization, increasing the opening/final forging temperature, and improving the forgeability

Active Publication Date: 2022-04-19
JIANGSU LONGDA SUPERALLOY MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The alloy consists of Cr and Mo as solid solution elements, and contains high Al and Ti (Al+Ti≥4wt%), resulting in a larger thermal processing temperature range of the alloy and a narrower part of the superalloy

Method used

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  • A method for compensating heating assisted free forging to produce difficult-to-deform nickel-based superalloys
  • A method for compensating heating assisted free forging to produce difficult-to-deform nickel-based superalloys
  • A method for compensating heating assisted free forging to produce difficult-to-deform nickel-based superalloys

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1. Specifications of finished bar: Φ250mm

[0047] 2. Mechanical properties: The heat treatment parameters of all mechanical properties test samples are as follows:

[0048] Solution treatment: 995℃~1035℃, heat preservation for 4 hours, water cooling;

[0049] Stabilization heat treatment: 845°C±10°C, heat preservation for 4±0.5 hours, air cooling;

[0050] Aging heat treatment: 760°C±10°C, heat preservation for 16±1 hours, air cooling.

[0051] The mechanical property of bar head / tail in the embodiment 1 of table 1

[0052]

[0053]

[0054] 3. Ultrasonic inspection

[0055] The bars are subjected to 100% ultrasonic inspection one by one, which meets the requirements of Φ1.5mm flat-bottomed holes in GB / T4162-2008.

[0056] 4. High-magnification tissue

[0057] See grain size Figure 5 . The overall grain size is 6 grades, and the difference is less than or equal to 2 grades.

Embodiment 2

[0059] 1. Specifications of finished bar: Φ250mm

[0060] 2. Mechanical properties:

[0061] Heat treatment system for all mechanical properties testing samples:

[0062] Solution treatment: 995℃~1035℃, heat preservation for 4 hours, water cooling;

[0063] Stabilization heat treatment: 845°C±10°C, heat preservation for 4±0.5 hours, air cooling;

[0064] Aging heat treatment: 760°C±10°C, heat preservation for 16±1 hours, air cooling.

[0065] The mechanical property of bar head / tail in the embodiment 2 of table 2

[0066]

[0067] 3. Ultrasonic inspection

[0068] The bars are subjected to 100% ultrasonic inspection one by one, which meets the requirements of Φ1.5mm flat-bottomed holes in GB / T4162-2008.

[0069] 4. High-magnification tissue

[0070] See grain size Figure 6 . The overall grain size is 6.5 grades, and the grade difference is less than or equal to 2 grades.

Embodiment 3

[0072] 1. Specifications of finished bar: Φ250mm

[0073] 2. Mechanical properties:

[0074] Heat treatment system for all mechanical properties testing samples:

[0075] Solution treatment: 995℃~1035℃, heat preservation for 4 hours, water cooling;

[0076] Stabilization heat treatment: 845°C±10°C, heat preservation for 4±0.5 hours, air cooling;

[0077] Aging heat treatment: 760°C±10°C, heat preservation for 16±1 hours, air cooling.

[0078] The mechanical property of bar head / tail in the embodiment 3 of table 3

[0079]

[0080] 3. Ultrasonic inspection

[0081] The bars are subjected to 100% ultrasonic inspection one by one, which meets the requirements of Φ1.5mm flat-bottomed holes in GB / T4162-2008.

[0082] 4. High-magnification tissue

[0083] See grain size Figure 7 . The overall grain size is 6 grades, and the difference is less than or equal to 2 grades.

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Abstract

The invention belongs to the technical field of high-temperature alloy manufacturing, and in particular relates to a method for compensating and heating-assisted free forging to produce difficult-to-deform nickel-based high-temperature alloys. The method for producing a difficult-to-deform nickel-based superalloy by compensating heating and assisting free forging of the present invention adopts the following process flow: vacuum induction furnace smelting→vacuum self-consumption remelting→turning treatment→alloy ingot forging heating→compensating heating→free forging multi-fire forging The finished material, through the method of supplementary heating in the free forging hot processing process, reduces the temperature loss during the material running process and thus increases the deformation temperature. Without reducing the deformation amount, it obtains a high temperature resistant to deformation with better comprehensive performance. Alloy bars.

Description

technical field [0001] The invention belongs to the technical field of high-temperature alloy manufacturing, and in particular relates to a method for compensating and heating-assisted free forging to produce difficult-to-deform nickel-based high-temperature alloys. Background technique [0002] Compared with ordinary metal materials, the thermal deformation of nickel-based deformed superalloys has the characteristics of low thermoplasticity, large deformation resistance, narrow thermal processing temperature window, no phase change in the matrix, and low thermal conductivity. These characteristics determine the performance of nickel-based deformed superalloys. Thermal deformation behavior has its own characteristics. Among them, the sum of Al, Ti, and Nb elements is greater than or equal to 4% (Al+Ti+Nb≥4wt%), which is generally a difficult-to-deform alloy in superalloys. Waspaloy nickel-based superalloys are a kind of difficult-to-deform alloys. It is based on Nickel is t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/00B21J1/02B21J1/06B21J5/06B21J5/08C22C1/02C22C19/05
CPCB21J5/002B21J1/02B21J1/06B21J5/06B21J5/08C22C1/023C22C19/055
Inventor 李成龙荣文凯王玉葵李晴王琦钟裕国浦益龙王世普赵长虹吕斌
Owner JIANGSU LONGDA SUPERALLOY MATERIAL CO LTD
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