Flat-mold hot extrusion process of nickel-based powder superalloy

A nickel-based superalloy and superalloy technology, applied in the field of powder metallurgy materials, can solve problems such as poor plasticity, and achieve the effects of reducing resistance, reducing surface quality deterioration, and reducing resistance

Inactive Publication Date: 2021-08-27
SINO EURO MATERIALS TECH OF XIAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Because superalloys still have high strength a

Method used

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  • Flat-mold hot extrusion process of nickel-based powder superalloy
  • Flat-mold hot extrusion process of nickel-based powder superalloy
  • Flat-mold hot extrusion process of nickel-based powder superalloy

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0040] Example 1

[0041] This embodiment provides a flat-mold thermal extrusion process of a nickel powder high-temperature alloy FGH4096, an FGH4096 bar, a plasma rotary electrode method (PREP) powder, sieving and electrostatic introspecting treatment for prepared powder, Make sure the powder particle size distribution ranges from 15 to 53 μm, and the inclusion content is less than 3 / 500 g.

[0042] The prepared powder was mounted in a stainless steel package 4, and vacuum degassing storage treatment, wherein the stainless steel sleeve 4 is a 316 stainless steel that binds to metallurgical.

[0043] After the stainless steel sheath filled with the powder 4 to 1070 ℃ was heated in a hot isostatic pressing furnace and incubated 3h, hot isostatic pressing treatment to obtain a blank.

[0044] After the hot isostatic press treatment to obtain a blank (including stainless steel sheath 4) antioxidants surface evenly, and then heated to 250 deg.] C, incubated 3h, cooled to room temperat...

Example Embodiment

[0048] Example 2

[0049] The present embodiment provides a further nickel-base superalloy hot FGH4096 flat die extrusion process, for FGH4096 rod, by plasma rotating electrode process (the PREP) milling, the powder prepared were sieved and electrostatically sundries to ensure that the powder particle size distribution of 15 ~ 53μm, inclusion content of less than 3 / 500g.

[0050] The prepared powder was mounted in a stainless steel package 4, and vacuum degassing storage treatment, wherein the stainless steel sleeve 4 is a 316 stainless steel that binds to metallurgical.

[0051] The stainless steel sheath filled with the powder 4 to 1100 ℃ was heated in a hot isostatic pressing furnace and incubated 4h, after hot isostatic pressing and the like to give a blank.

[0052] After the hot isostatic press treatment to obtain a blank (including stainless steel sheath 4) antioxidants surface evenly, and then heated to 220 deg.] C, incubated 4h, cooled to room temperature.

[0053] The ...

Example Embodiment

[0056] Example 3

[0057] The present embodiment provides a further nickel-base superalloy hot FGH4096 flat die extrusion process, for FGH4096 rod, by plasma rotating electrode process (the PREP) milling, the powder prepared were sieved and electrostatically sundries to ensure that the powder particle size distribution of 15 ~ 53μm, inclusion content of less than 3 / 500g.

[0058] The prepared powder was mounted in a stainless steel package 4, and vacuum degassing storage treatment, wherein the stainless steel sleeve 4 is a 316 stainless steel that binds to metallurgical.

[0059] After the stainless steel sheath filled with the powder 4 to 1130 ℃ was heated in a hot isostatic pressing furnace and incubated 2h, hot isostatic pressing treatment to obtain a blank.

[0060] After the hot isostatic press treatment to obtain a blank (including stainless steel sheath 4) antioxidants surface evenly, and then heated to 200 ℃, incubated 2h, cooled to room temperature.

[0061] The applica...

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Abstract

The invention belongs to the technical field of powder metallurgy materials, and relates to a flat-mold hot extrusion process of nickel-based powder superalloy FGH4096. The surface of a nickel-based powder superalloy FGH4096 blank subjected to hot isostatic pressing treatment is uniformly coated with an antioxidant, so that the oxidation of the blank after high-temperature heating can be greatly reduced, the oxide skin on the surface of the blank is reduced, the resistance in the extrusion process can be reduced, and the phenomenon that the surface quality of an extruded bar becomes poor due to too much oxide skin can be reduced; in addition, the transfer time of the blank from discharging to an extrusion workbench is controlled to be less than or equal to 50s, and a glass lubricant is quickly and uniformly sprayed on the surface of the blank during the period, so that the resistance in the extrusion process is reduced, and the resistance is reduced. According to the process, cracking in the hot extrusion process of the blank can be avoided, original particle boundary substances (PPB) are eliminated, heat-induced holes are closed, grains are refined, distribution of precipitated phases is adjusted, meanwhile, plasticity can be improved, and the fatigue life can be prolonged.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy materials, and relates to a nickel-based powder superalloy, in particular to a flat-die hot extrusion process of the nickel-based powder superalloy FGH4096. Background technique [0002] Nickel-based powder superalloy is a nickel-based superalloy prepared by powder metallurgy technology. It has the advantages of uniform structure, no macro-segregation, high alloying degree, high yield strength, good oxidation resistance and fatigue resistance, so it is a thermal structure. One of the commonly used materials for parts. As a typical second-generation powder superalloy, FGH4096 superalloy has high creep strength, crack growth resistance and damage tolerance, and its maximum service temperature can reach 530 °C. The high-pressure turbine discs, sealing rings and powder discs manufactured by it are widely used in hot-end components such as aero-engine turbine discs. [0003] The hot extrusi...

Claims

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Application Information

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IPC IPC(8): B22F3/15B22F3/20B22F3/24B22F9/14C22C1/04
CPCB22F3/15B22F3/20B22F3/24B22F9/14B22F2003/208B22F2003/248C22C1/0433
Inventor 陈蕾蕾瞿宗宏宋嘉明白瑞敏罗成赖运金王庆相梁书锦
Owner SINO EURO MATERIALS TECH OF XIAN CO LTD
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