文章信息/Info

Title:

Preparation of Anti-Friction and Wear-Resistant Coating at High Speed

文章編號:

1674-3962(2020)10-0769-07

作者:

蘇靜雨; 蔡洪能; 雷逸舟; 魏志遠

(西安交通大學 金屬材料強度國家重點實驗室，陜西 西安 710049)

Author(s):

SU Jingyu;  CAI Hongneng;  LEI Yizhou;  WEI Zhiyuan

(State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China)

關鍵詞:

高超聲速; 超音速火焰噴涂; 減摩耐磨涂層; NiCr�睠r3C2; 高溫

Keywords:

hypersonic;  high velocity oxygen fuel(HVOF) spraying;  anti-friction and wear-resistant coating;  NiCr-Cr3C2;  high temperature

分類號:

TG174.44

DOI:

10.7502/j.issn.1674-3962.201905039

文獻標志碼:

A

摘要:

工件在高速條件下工作時，由于同時受到摩擦磨損和高溫的作用，會對其造成十分嚴重的損傷。針對在高速條件下工作的摩擦副，借助超音速火焰噴涂技術制備了含Ni包MoS2的Ni-25MoS2/NiCr-Cr3C2減摩耐磨涂層，以期提高工件接觸表面的耐磨損性能，減小工件表面的摩擦因數，延緩工件基體表面的升溫速率。通過三因素三水平正交試驗計算出了最優噴涂工藝參數，包括送粉速率、O2流速、C3H8流速。對所獲得的減摩耐磨涂層進行掃描電鏡觀察和X射線衍射分析，觀察不同Ni包MoS2含量涂層的顯微形貌，統計不同Ni包MoS2含量涂層的孔隙率，分析確定不同Ni包MoS2含量涂層的成分。最后，結合摩擦磨損試驗，分析不同Ni包MoS2含量對Ni-25MoS2/NiCr-Cr3C2涂層減摩耐磨性能的影響，從而得到性能優異的減摩耐磨涂層。

Abstract:

When the workpiece is working under high-speed conditions, it will suffer serious damage due to the effect of friction, wear and high temperature. Aiming at the friction pairs working under high�瞫peed conditions, Ni-25MoS2/NiCr-Cr3C2 anti-friction and wear-resistant coatings containing Ni-coated MoS2 were prepared by means of high velocity oxygen fuel (HVOF) spraying technology, in order to improve the wear resistance of the contact surface of the workpiece, reduce the friction coefficient of the workpiece surface and delay the temperature rise of the substrate surface. In this paper, the optimum spraying process parameters were calculated by the orthogonal test method with three factors and three levels, including powder feeding rate, oxygen flow rate and the fuel C3H8 flow rate. The anti-friction and wear-resistant coatings were observed by SEM and X-ray diffraction analysis. The micro-morphology of the coatings with different Ni�瞔oated MoS2 content was observed, the porosity of the coatings was counted, and the composition of the coatings was determined after analysis. Finally, according to the friction and wear tests result, the effect of different Ni�瞔oated MoS2 content on the friction and wear resistance of Ni-25MoS2/NiCr-Cr3C2 coatings was analyzed, and the excellent anti-friction and wear coatings were prepared.