当前位置: X-MOL 学术Int. J. Mech. Mater. Eng. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Friction and contact temperature in dry rolling-sliding contacts with MoS2-bonded and a-C:H:Zr DLC coatings
International Journal of Mechanical and Materials Engineering Pub Date : 2021-06-15 , DOI: 10.1186/s40712-021-00129-3
Stefan Hofmann , Mustafa Yilmaz , Enzo Maier , Thomas Lohner , Karsten Stahl

Gearboxes are usually lubricated with oil or grease to reduce friction and wear and to dissipate heat. However, gearbox applications that cannot be lubricated with oil or grease, for example in the space or food industry, are commonly lubricated with solid lubricants. Especially solid lubricants with a lamellar sliding mechanism like graphite and molybdenum disulfide (MoS2) or diamond-like carbon (DLC) coatings can enable very low coefficients of friction. This study investigates the friction and temperature behavior of surface coatings in rolling-sliding contacts for the application in dry lubricated gears. In an experimental setup on a twin-disk test rig, case-hardened steel 16MnCr5E (AISI5115) is considered as substrate material together with an amorphous, hydrogenated, and metal-containing a-C:H:Zr DLC coating (ZrCg) and a MoS2-bonded coating (MoS2-BoC). The friction curves show reduced coefficients of friction and a significantly increased operating area for both surface coatings. Due to the sufficient electrical insulation of the MoS2-BoC, the application of thin-film temperature measurement-known from lubricated contacts-was successfully transfered to dry rolling-sliding contacts. The results of the contact temperature measurements reveal pronounced thermal insulation with MoS2-BoC, which can interefere the sliding mechanism of MoS2 by accelerated oxidation. The study shows that the application of dry lubricated gears under ambient air conditions is challenging as the tribological and thermal behavior requires tailored surface coatings.

中文翻译:

具有 MoS 2键合和 aC:H:Zr DLC 涂层的干式滚动滑动触点的摩擦和接触温度

齿轮箱通常用油或油脂润滑,以减少摩擦和磨损并散热。然而,不能用油或油脂润滑的齿轮箱应用,例如在航天或食品工业中,通常用固体润滑剂润滑。特别是具有层状滑动机制的固体润滑剂,如石墨和二硫化钼 (MoS2) 或类金刚石碳 (DLC) 涂层,可以实现非常低的摩擦系数。本研究调查了用于干润滑齿轮的滚动滑动接触中表面涂层的摩擦和温度行为。在双盘试验台上的实验装置中,表面硬化钢 16MnCr5E (AISI5115) 与非晶、氢化和含金属的 aC:H 一起被视为基材材料:Zr DLC 涂层 (ZrCg) 和 MoS2 键合涂层 (MoS2-BoC)。摩擦曲线显示两种表面涂层的摩擦系数降低,工作面积显着增加。由于 MoS2-BoC 具有足够的电绝缘性,薄膜温度测量的应用(从润滑触点已知)已成功转移到干式滚动滑动触点。接触温度测量结果显示 MoS2-BoC 具有明显的隔热性,这可以通过加速氧化来干扰 MoS2 的滑动机制。研究表明,干式润滑齿轮在环境空气条件下的应用具有挑战性,因为摩擦学和热行为需要定制的表面涂层。摩擦曲线显示两种表面涂层的摩擦系数降低,工作面积显着增加。由于 MoS2-BoC 具有足够的电绝缘性,薄膜温度测量的应用(从润滑触点已知)已成功转移到干式滚动滑动触点。接触温度测量结果显示 MoS2-BoC 具有明显的隔热性,这可以通过加速氧化来干扰 MoS2 的滑动机制。研究表明,干式润滑齿轮在环境空气条件下的应用具有挑战性,因为摩擦学和热行为需要定制的表面涂层。摩擦曲线显示两种表面涂层的摩擦系数降低,工作面积显着增加。由于 MoS2-BoC 具有足够的电绝缘性,薄膜温度测量的应用(从润滑触点已知)已成功转移到干式滚动滑动触点。接触温度测量结果显示 MoS2-BoC 具有明显的热绝缘性,这可以通过加速氧化来干扰 MoS2 的滑动机制。研究表明,干式润滑齿轮在环境空气条件下的应用具有挑战性,因为摩擦学和热行为需要定制的表面涂层。薄膜温度测量的应用——从润滑接触中知道——被成功地转移到干式滚动滑动接触上。接触温度测量结果显示 MoS2-BoC 具有明显的热绝缘性,这可以通过加速氧化来干扰 MoS2 的滑动机制。研究表明,干式润滑齿轮在环境空气条件下的应用具有挑战性,因为摩擦学和热行为需要定制的表面涂层。薄膜温度测量的应用——从润滑接触中知道——被成功地转移到干式滚动滑动接触上。接触温度测量结果显示 MoS2-BoC 具有明显的热绝缘性,这可以通过加速氧化来干扰 MoS2 的滑动机制。研究表明,干式润滑齿轮在环境空气条件下的应用具有挑战性,因为摩擦学和热行为需要定制的表面涂层。
更新日期:2021-06-15
down
wechat
bug