Research on the Optimal Selection of Coating for the Friction Pair of Hydraulic Cylinder for Control Rod Hydraulic Drive Mechanism

SHI Yong, CHEN Bao, BO Han-liang

doi:10.16577/j.issn.1001-1560.2023.0025

2023 , Vol. 56 >Issue 1: 175 - 183

DOI: https://doi.org/10.16577/j.issn.1001-1560.2023.0025

Research on the Optimal Selection of Coating for the Friction Pair of Hydraulic Cylinder for Control Rod Hydraulic Drive Mechanism

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1. The 7-th Representative Staff of Navy Equipment Department at Peking Area， Beijing 100120， China；2. Institute of Nuclear and New Energy Technology， Tsinghua University， Beijing 100084， China

Received date: 2022-07-16

Revised date: 2022-08-20

Accepted date: 2022-09-15

Online published: 2023-07-27

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Abstract

According to the use requirements of the control rod hydraulic drive mechanism，aiming at solving the radioactive problem caused by the use of material containing cobalt element (Co) as the adhesive of the tungsten carbide (WC) coating of the outer casing of the hydraulic cylinder， and based on the friction and wear test matching with the piston ring friction pair， the optimal selection study of the coating for the friction pair of the hydraulic cylinder was carried out， the chromium carbide (Cr3C2) coating scheme was proposed， and the performance of Cr3C2 coating as well as the cold state performance of the hydraulic cylinder were tested. Results showed that the Cr3C2 coating had lower friction coefficient and better friction and wear properties than the WC coating， and the coating properties as well as the cold motion resistance and leakage rate of the hydraulic cylinder were equivalent to those in the case of WC coating， which met the use requirements of the control rod hydraulic drive mechanism. Moreover，unlike the WC coating，Cr3C2 coating did not contain Co，so there was no need for a radioactive treatment.Furthermore， the Cr3C2 coating did not need to deposit TiN film， which simplified the surface treatment process of the friction pair of the outer cylinder of the hydraulic cylinder. The research results could provide technical reserves for the overall performance research of control rod hydraulic drive mechanism and the further upgrading of control rod hydraulic drive technology.

Key words： control rod hydraulic drive mechanism; friction pair of hydraulic cylinder; optimal selection of coating materials; friction and wear properties

Cite this article

SHI Yong, CHEN Bao, BO Han-liang . Research on the Optimal Selection of Coating for the Friction Pair of Hydraulic Cylinder for Control Rod Hydraulic Drive Mechanism[J]. Materials Protection, 2023 , 56(1) : 175 -183 . DOI: 10.16577/j.issn.1001-1560.2023.0025

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