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Auxiliary processing method for surface layer infiltration and weakening treatment for nickel and chromium alloy cutting

A technology of auxiliary processing and cutting processing, applied in the direction of metal material coating process, coating, solid diffusion coating, etc., can solve the problems of reducing the strength and plastic properties of the workpiece surface material, so as to reduce tool wear and improve cutting processing. The effect of poor performance and reduction of cutting energy consumption

Active Publication Date: 2021-08-31
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the infiltration of alloying elements, the strength and plasticity of the surface material of the workpiece are reduced

Method used

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  • Auxiliary processing method for surface layer infiltration and weakening treatment for nickel and chromium alloy cutting
  • Auxiliary processing method for surface layer infiltration and weakening treatment for nickel and chromium alloy cutting
  • Auxiliary processing method for surface layer infiltration and weakening treatment for nickel and chromium alloy cutting

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Embodiment approach

[0048] A third embodiment of the present invention, there is provided a workpiece for the above-described nickel, chromium alloy cutting surface infiltration of weakening processing aid processing method tellurium obtained.

[0049] Fourth embodiment of the present invention, there is provided an application of the surface layer for infiltration tellurium, nickel-chromium alloy cutting processing aid processing method of weakening adjustment processing of the alloy surface roughness.

[0050] In order to make it possible to understand the technical solution of the present invention more clearly, the technical solution of the present invention will be described in detail below.

Embodiment 1

[0052] Example superalloy material of the present embodiment is a nickel-based superalloy Inconel 718.

[0053] (1) at a cutting depth of 25μm to 25μm processing requirements, alloying layer thickness control, calculated using simulation software to simulate VASP first principles simulation result is: a solid element tellurium alloy element powder as a surface layer of the workpiece material weakening . The solid material is uniformly coated with elemental tellurium superalloy, the heating temperature is 850 ℃, heating rate of 50 ℃ / min, incubation time was 4 hours, to achieve weakened layer 25μm thick.

[0054] Example tellurium skin permeability mechanism of the present embodiment as weakening figure 1 Distance figure 1 Show elemental tellurium Ni and other elements to form a new crystalline phase, the crystalline phase caused by intergranular cracking.

[0055] Example embodiment of the present sample surface section after infiltration of elemental tellurium as figure 2 Shown,...

Embodiment 2

[0059] This embodiment is the same as in Example 1, except that: the heating temperature is 900 ℃, heating rate of 50 ℃ / min, incubation time was 4 hours, the weakened layer thickness is 30μm.

[0060] Structural changes before and after the surface microstructure tellurium infiltration, such as image 3 As shown, you can see the grain size increased significantly, increasing by nearly three times, in general, to increase the grain size decreased mechanical properties mean it.

[0061] Workpiece material after infiltration nanoindentation test tellurium from the surface to the inside of the base, such as Figure 4 , The results show that the hardness gradually increases from the surface to the interior of the base body, which can explain the mechanical properties are weakened.

[0062] Workpiece material after infiltration tellurium scratch test performed microns, a scratch across the surface of the substrate, the constant load test conditions were 100 mN, scratch speed of 5 m per ...

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Abstract

The invention provides an auxiliary processing method for surface tellurium infiltration weakening treatment for nickel and chromium alloy cutting. The surface of the nickel and chromium alloy is coated with solid tellurium element powder, and then heated to 700-1200° C. to keep the tellurium element infiltrated into the containing The surface layer of nickel and chromium alloys, and then the heat-treated nickel and chromium alloys are cut. The present invention can significantly improve the machinability and surface processing quality of workpiece materials, reduce cutting energy consumption, and slow down tool wear. The technical method proposed by the present invention is flexible and convenient, and can essentially improve the problem of poor machinability of workpiece materials.

Description

Technical field [0001] The present invention belongs to the field of nickel and chromium alloy, which relates to a surface-lacexxomer weakened treatment auxiliary processing method for nickel and chromium alloy cutting. Background technique [0002] The information disclosed in the background is only intended to increase the understanding of the overall background of the present invention, and is not necessarily considered to recognize or imply that the information is intended to be a prior art known to those of ordinary skill in the art. [0003] High temperature alloys are widely used in manufacturing aviation engines due to high-strength, high toughness, and good anti-fatigue, antioxidant corrosive, excellent creep and fatigue resistance, good tissue stability, and reliability and reliability. Heat key components such as gas turbines such as air engine turbine disc, integral leaf discs, etc. Therefore, the high-temperature alloy has become one of the important signs of a natio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/62
CPCC23C8/62
Inventor 刘战强李国英王兵
Owner SHANDONG UNIV