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Clad layer with wear-resisting antifriction effect, preparation method of clad layer with wear-resisting antifriction effect, and piston ring

A coating and equipment technology, applied in the direction of piston rings, coating of superimposed layers, chemical instruments and methods, etc.

Pending Publication Date: 2019-07-09
ASIMCO SHUANGHUAN PISTON RING YIZHENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its wear resistance, durability and anti-friction effect need to be further improved.

Method used

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  • Clad layer with wear-resisting antifriction effect, preparation method of clad layer with wear-resisting antifriction effect, and piston ring
  • Clad layer with wear-resisting antifriction effect, preparation method of clad layer with wear-resisting antifriction effect, and piston ring
  • Clad layer with wear-resisting antifriction effect, preparation method of clad layer with wear-resisting antifriction effect, and piston ring

Examples

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preparation example Construction

[0065] In another specific embodiment, the present invention provides a kind of preparation method of described coating, specifically comprises the following steps:

[0066] (1) cleaning the surface of the substrate 1 to obtain the cleaned substrate 1, the cleaning specifically includes:

[0067] (a) Degrease and degrease the surface of the substrate 1, clean it with ultrasonic waves, put it into a multi-arc ion plating equipment after drying, heat it to 380-450°C, and evacuate it to 5.0×10 -3 Below Pa; the base 1 can be a piston ring;

[0068] (b) Feed Ar with a purity of 99.99% into the multi-arc ion plating equipment, under the condition of a negative bias of -800--1200V, Ar ions bombard and clean the surface of the piston ring.

[0069] (2) Use the metal Cr target as the cathode, use Ar as the working reaction gas, the cathode current is 80-120A, the air pressure is 1-2Pa, the substrate 1 is negatively biased at -17--23V, and the bonding layer Cr layer is deposited on the...

Embodiment 1

[0076] A coating on the surface of a piston ring, the thickness of the coating is 10 μm, the coating sequentially includes a bonding layer 2, a transition layer 3, a gradient layer 4 and a functional layer 7, and the bonding layer 2 is located on the surface of the piston ring.

[0077] The bonding layer 2 is a Cr layer, and the thickness of the bonding layer 2 is 0.5 μm.

[0078] The transition layer 3 is a CrN layer, and the thickness of the transition layer 3 is 1 μm.

[0079] The gradient layer 4 is CrMo with a gradient increase in Mo element content x N layer, gradient layer 4 has a thickness of 1 μm.

[0080] The functional layer 7 (modulation structure) includes a cycle layer, each cycle layer includes a first CrMo x N layer 5 and covered with the first CrMo x The second CrMo on the surface of N layer 5 x N layer 6, first CrMo x The Mo element content in the N layer 5 is lower than that of the second CrMo x Mo element content in N layer 6; The first CrMo x The Mo...

Embodiment 2

[0092] A coating on the surface of a piston ring, the thickness of the coating is 80 μm, the coating sequentially includes a bonding layer 2, a transition layer 3, a gradient layer 4 and a functional layer 7, and the bonding layer 2 is located on the surface of the piston ring.

[0093] The bonding layer 2 is a Cr layer, and the thickness of the bonding layer 2 is 3 μm.

[0094] The transition layer 3 is Cr 2 N layer, transition layer 3 has a thickness of 11 μm.

[0095] The gradient layer 4 is CrMo with a gradient increase in Mo element content x N layer, gradient layer 4 has a thickness of 11 μm.

[0096] The functional layer 7 (modulation structure) includes 20 circulation layers, and each circulation layer includes the first CrMo x N layer 5 and covered with the first CrMo x The second CrMo on the surface of N layer 5 x N layer 6, first CrMo x The Mo element content in the N layer 5 is lower than that of the second CrMo x Mo element content in N layer 6; The first C...

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Abstract

The invention provides a clad layer with a wear-resisting antifriction effect, a preparation method of the clad layer with the wear-resisting antifriction effect, and a piston ring. A clad layer sequentially comprises a bonding layer, a transition layer, a gradient layer, and a functional layer; the gradient layer is CrMo<x>N layers with anMo content increasing in a gradient mode; the functional layer comprises one or more circulating layers, each of the circulating layers comprises sequentially from bottom to top a first CrMo<x>N layer and a second CrMo<x>N layer, and the Mo element content in the first CrMo<x>N layer is lower than the Mo element content in the second CrMo<x>N layer. Compared with the CrN clad layer, the friction coefficient of the clad layer with the wear-resisting antifriction effectis lower by 10% to 30%, and the friction coefficient is 0.3 to 0.45; the overall hardness of the clad layer can reach 1400 to 2600 HV, the thickness can reach 80 [mu]m, the whole life durability requirement of the piston ring can be met; the preparation technology of the clad layer is simple, operability is high, and industrialization is convenient.

Description

technical field [0001] The invention belongs to the technical field of surface treatment, and relates to a coating and its preparation method and application, in particular to a coating with wear-resistant and friction-reducing functions, its preparation method and a piston ring. Background technique [0002] To adapt to the increasingly tightened fuel consumption standards, improving the combustion efficiency of the engine and reducing the friction loss of various parts of the engine are effective ways to deal with it. Among them, the friction loss of the piston assembly accounts for 40-60% of the total friction loss of the vehicle engine. Therefore, it is very important to reduce the friction loss of the piston assembly, and the requirement for the piston ring to have as low friction performance as possible throughout the service life is put forward. [0003] In order to improve the efficiency and life of the piston system, high-hardness wear-resistant coatings are gradua...

Claims

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Application Information

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IPC IPC(8): C23C14/06C23C14/16C23C14/32F02F5/00
CPCC23C14/0641C23C14/16C23C14/325C23C14/0021F02F5/00C23C14/025C23C14/027C23C14/022F16J9/26C23C28/04C23C28/044C23C28/048C23C30/00B08B7/0071B08B7/028C23C28/42
Inventor 刘千喜张波李开顺
Owner ASIMCO SHUANGHUAN PISTON RING YIZHENG