Structure and method for improving tribological performance of E690 steel

A tribology and performance technology, applied in the field of surface modification, which can solve the problems of low hardness, component failure, matrix corrosion, etc.

Active Publication Date: 2021-07-06
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The matrix of E690 steel is a multiphase structure with superimposed ferrite and cementite. The matrix phase is flaky pearlite, which has good plasticity and toughness, but the hardness Not high, easy to wear, surface processing defects such as cracks and pores will aggravate matrix corrosion and cause component failure

Method used

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  • Structure and method for improving tribological performance of E690 steel
  • Structure and method for improving tribological performance of E690 steel
  • Structure and method for improving tribological performance of E690 steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The film structure is Ti / TiN / TiCN / TiCrAlN set from the inside and the outside, the total deposition thickness is 2.5um, Ti layer: open the Ti target, control the working pressure 0.5Pa, pulse bias 300V, duty cycle 20%, arc Current 100A; TiN layer: control the total working pressure 0.8Pa, Ti target current 120A, N 2 Flow rate 30sccm; TiCN layer: open Ti target, arc current 110A, control N 2 The flow is 80sccm, C 2 H 2 The flow rate is 100sccm; TiCrAlN layer: 3 targets co-sputtering: Ti target, Al target use DC power supply, Cr target use RF power supply, background vacuum 5.0×10 -4 Pa, the working pressure is about 0.9Pa, the partial pressure of argon and nitrogen are both 0.4Pa and 0.5Pa, the negative bias voltage of the substrate is 100V, the substrate temperature is 300℃, the Ar pressure in the furnace is kept at 0.05Mpa during annealing, and the temperature rises during annealing. The speed is 15°C / min, the temperature is kept for 2h, and it is cooled with the fu...

Embodiment 2

[0050] The film structure is Cr / CrN / TiAlN / TiCrAlN set from the inside and the outside, the total deposition thickness is 3.0um, Cr layer: open the Cr target, control the working pressure 0.5Pa, pulse bias 300V, duty cycle 20%, arc Current 100A; CrN layer: control the total working pressure 0.8Pa, Cr target current 100A, N 2 Flow rate 25sccm; TiAlN layer: open Ti target, Al target, arc current 80A, control N 2 The flow rate is 30sccm, TiCrAlN layer: 3 targets co-sputtering: Ti target, Al target use DC power supply, Cr target use RF power supply, background vacuum 5.0×10 -4 Pa, the working pressure is about 0.9Pa, the partial pressure of argon and nitrogen are both 0.4Pa and 0.5Pa, the negative bias voltage of the substrate is 100V, and the substrate temperature is 300°C; during annealing, the Ar pressure in the furnace is kept at 0.05Mpa, and the annealing temperature is increased. The speed is 15°C / min, the temperature is kept for 2h, and it is cooled with the furnace.

[00...

Embodiment 3

[0055] The film structure is Ti / TiN / TiAlN / TiCrAlN set from the inside and the outside, the total deposition thickness is 3.0um, Ti layer: open the Ti target, control the working pressure 0.5Pa, pulse bias 300V, duty cycle 20%, arc Current 110A; TiN layer: control the total working pressure 0.8Pa, TI target current 100A, N 2 Flow rate 25sccm; TiAlN layer: open Ti target, Al target, arc current 80A, control N 2 The flow rate is 30sccm; TiCrAlN layer: 3 targets co-sputtering, Ti target, Al target use DC power supply, Cr target use RF power supply, background vacuum 6.0×10 -4 Pa, the working pressure is about 0.7Pa, the partial pressure of argon and nitrogen are both 0.3Pa and 0.4Pa, the negative bias voltage of the substrate is 150V, the substrate temperature is 200℃, the Ar pressure in the furnace is maintained at 0.04Mpa during annealing, and the temperature rises during annealing. The speed is 15°C / min, the temperature is kept for 4h, and the furnace is cooled.

[0056] The ...

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Abstract

The invention discloses a structure and method for improving tribological performance of E690 steel for maritime work, and belongs to the technical field of surface modification. According to the structure, E690 steel serves as a matrix, a multi-layer composite film is deposited on the matrix, the multi-layer composite film comprises a base layer, a gradient layer, a supporting layer and a wear-resistant and anti-corrosion layer which are arranged from inside to outside, the micro-hardness of the base layer, the gradient layer and the supporting layer is increased layer by layer from inside to outside, the micro-hardness of the supporting layer is larger than that of the base layer, and the micro-hardness of the supporting layer is the same as that of the abrasion-resistant and anti-corrosion layer. The method comprises the following steps of performing heat treatment, rough machining and finish machining on a matrix material, depositing the multi-layer film by adopting a plasma enhanced magnetron sputtering technology, then depositing a surface film by adopting the magnetron sputtering technology, and finally annealing the coated E690 steel in a vacuum annealing furnace. The multi-layer composite film prepared by the method is well combined with the E690 steel matrix, and has lower friction coefficient and good wear resistance and corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of surface modification, and in particular relates to a structure and a method for improving the tribological properties of E690 steel. Background technique [0002] As an important marine engineering steel, E690 steel has harsh service conditions. Friction, wear and stress corrosion are prone to occur in heavy-duty lifting mechanisms, which affect the safety and service life of the mechanism. There are many moving parts in offshore engineering platform equipment, such as in Gears, valves, pumps and key components in heavy lifting in marine environments are prone to friction and wear during use. Therefore, it is very important to use technical means to improve the overall performance of E690 steel. [0003] Multi-arc ion plating film has attracted wide attention due to its high hardness, high wear resistance, corrosion resistance and many other advantages, and has been widely used in the fields of electroni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/06C23C14/16C23C14/18C23C14/35C23C14/58C21D6/04C21D1/18
CPCC23C14/0641C23C14/0664C23C14/0036C23C14/16C23C14/18C23C14/352C23C14/5806C21D6/04C21D1/18
Inventor 王建波苏波泳李天乐徐影郭东军张森
Owner NANTONG UNIVERSITY
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