High-entropy alloy for manufacturing flexspline and processing method of flexspline

A technology of high-entropy alloys and processing methods, which is applied in the direction of manufacturing tools, furnace types, furnaces, etc., can solve the problems that the service life of the harmonic reducer is difficult to make a major breakthrough, the uniformity of the structure is poor, and there are many metallurgical defects. The product quality is easy to control, the production cost is low, and the performance is good.

Active Publication Date: 2020-11-24
NINGBO ZHONGDA LEADER TRANSMISSION EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of using hot-rolled medium-carbon low-alloy steel as raw materials are: poor structure uniformity, many metallurgical defects, relatively complex phase composition, low fracture toughness and poor damage tolerance. Therefore, the life of the harmonic reducer is generally not more than 20000h
On the basis of the existing technology, even through heat treatment, surface treatment, or no substantial process improvement, it is difficult to make a major breakthrough in the service life of the harmonic reducer

Method used

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  • High-entropy alloy for manufacturing flexspline and processing method of flexspline
  • High-entropy alloy for manufacturing flexspline and processing method of flexspline
  • High-entropy alloy for manufacturing flexspline and processing method of flexspline

Examples

Experimental program
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Effect test

Embodiment 1

[0055] A method for processing a flexible wheel includes the following steps:

[0056] a. Screen the types of high-entropy alloys, and select high-entropy alloys with FCC-type single-phase solid solution structure as the flexible wheel material;

[0057] b. Design high-entropy alloy chemical composition: high-entropy alloy is FeCoCrNiMo 0.2 C 0.1 , Where the mole ratio of Fe, Co, Cr and Ni is 24.925%, Mo mole ratio is 0.2%, and C mole ratio is 0.1%;

[0058] c. Melting high-entropy alloys: Use vacuum induction furnace to smelt high-entropy alloys. Before loading the furnace, the surface of Fe, Co, Cr, Ni, Mo and C (graphite) raw materials is derusted, dusted and dried; the vacuum is maintained during the melting period At 0.7Pa, the vacuum degree during refining is maintained at 5Pa, the refining temperature is 1530℃, and the retention time is 30min after the refining.

[0059] d. Preparation of high-entropy alloy powder: adopt gas atomization method to prepare high-entropy alloy powd...

Embodiment 2

[0068] A method for processing a flexible wheel includes the following steps:

[0069] a. Screen the types of high-entropy alloys, and select high-entropy alloys with FCC-type single-phase solid solution structure as the flexible wheel material;

[0070] b. Design high-entropy alloy chemical composition: high-entropy alloy is FeCoCrNiMo 0.2 C 0.1 , Where the mole ratio of Fe, Co, Cr and Ni is 24.925%, Mo mole ratio is 0.2%, and C mole ratio is 0.1%;

[0071] c. Melting high-entropy alloys: Use vacuum induction furnace to smelt high-entropy alloys. Before loading the furnace, the surface of Fe, Co, Cr, Ni, Mo and C (graphite) raw materials is derusted, dusted and dried; the vacuum is maintained during the melting period At 5Pa, the vacuum degree during refining is maintained at 30Pa, the refining temperature is 1500℃, and the retention time is 50min after the refining.

[0072] d. Preparation of high-entropy alloy powder: adopt gas atomization method to prepare high-entropy alloy powde...

Embodiment 3

[0081] A method for processing a flexible wheel includes the following steps:

[0082] a. Screen the types of high-entropy alloys, and select high-entropy alloys with FCC-type single-phase solid solution structure as the flexible wheel material;

[0083] b. Design high-entropy alloy chemical composition: high-entropy alloy is FeCoCrNiMo 0.2 C 0.1 , Where the mole ratio of Fe, Co, Cr and Ni is 24.925%, Mo mole ratio is 0.2%, and C mole ratio is 0.1%;

[0084] c. Melting high-entropy alloys: Use vacuum induction furnace to smelt high-entropy alloys. Before loading the furnace, the surface of Fe, Co, Cr, Ni, Mo and C (graphite) raw materials is derusted, dusted and dried; the vacuum is maintained during the melting period At 1.0Pa, the vacuum degree during refining is maintained at 15Pa, the refining temperature is 1510℃, and the retention time is 35min after the refining.

[0085] d. Preparation of high-entropy alloy powder: adopt gas atomization method to prepare high-entropy alloy pow...

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Abstract

The invention discloses a high-entropy alloy for manufacturing a flexspline and a processing method of the flexspline, and belongs to the technical field of harmonic reducer manufacturing. The high-entropy alloy is an FeCoCrNiMo0.2C0.1 high-entropy alloy with an FCC type single-phase solid solution structure. The processing method of the flexspline comprises the steps of smelting of the FeCoCrNiMo0.2C0.1 high-entropy alloy; preparing of high-entropy alloy powders; pressing forming; sintering; hot forging; high-temperature annealing; cryogenic treatment; machining forming; and shot peening. Theaverage grain size of the flexspline prepared by the method is 3-4 [um]m, the tensile strength is over 1200 MPa, the yield strength is over 900 MPa, the elongation rate is over 30%, the strong plastic product is over 36000 MPa, and the flexspline has higher mechanical property and transmission property, so that the service life of a harmonic reducer is prolonged.

Description

Technical field [0001] This application relates to the technical field of manufacturing a harmonic reducer, in particular to a high-entropy alloy used to manufacture a flexspline and a processing method for the flexspline. Background technique [0002] Harmonic reducer is widely used in aerospace, robotics, electronics and other fields because of its advantages such as high carrying capacity, large transmission ratio, small size, light weight, smooth transmission and high transmission accuracy. The harmonic reducer is mainly composed of three basic components: rigid wheel, flexible wheel and wave generator. The rigid wheel is a rigid internal gear, and the flexible wheel is an easily deformable thin-walled cylindrical external gear made of materials with better elasticity. The mouth end of the flexible wheel tube extends into the rigid wheel, and its external teeth mesh with the internal teeth of the rigid wheel. When the wave generator is driven by the power mechanism, the exte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00B22F5/00B22F9/08B22F3/02B22F3/10B22F3/17B22F3/24C22F1/00C21D9/32
CPCB22F3/02B22F3/1007B22F3/17B22F3/24B22F5/00B22F9/082B22F2003/247B22F2003/248B22F2009/0824B22F2009/0848B22F2009/088C21D9/32C22C30/00C22F1/00
Inventor 陈正周黄炳罗利敏岑庭炯
Owner NINGBO ZHONGDA LEADER TRANSMISSION EQUIP
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