【 Leading technology 】 The magic of the coating

【 Leading technology 】 The magic 2019 - coating 07 - 22 ( Source: timken) Zhou dunyi in wei said, 'praise the lotus' out of the silt but not imbrued'. In life, we often see dripping water on a lotus leaf into a free rolling water, and take away the dust on the leaf in the course of rolling. This kind of phenomenon is because of lotus leaf surface with a layer of fluff and micro wax particles, and the surface structure and roughness magically reached the micron to nanometer level. Have a hydrophobic, which makes lotus leaf water droplets and dust unable to adhere to the surface of a lotus leaf. Droplets formed under the action of surface tension, ball rolled out of the leaf. This is one of nature's most typical and common coating effect. Water droplets on a lotus leaf rolling in the industrial field, coating technology has been widely used, and even the development belt on materials science to a new height. Industrial equipment, to take more load, faster speed, higher temperature and continuous pollution threat, need better solid key components. And the bearing in the equipment often faces the challenge of reliability limit. Timken, found that although the use of special heat treatment process to produce the high reliability of bearings, but still some applications require more excellent wear resistance and corrosion resistance. Especially in bad working conditions, standard bearing tend to reach customers expect of long life and free maintenance. In order to reduce the damage under the condition of part, nearly 20 years, timken in rolling element bearings ( Ball and roller) Studying on the surface engineering technologies. 铁姆肯公司® 'antifriction bearing series, bearing with special engineering surface treatment and coating on the parts. Decades of research and development for timken has developed a series of options, the coating can improve the bearing performance in mining and many other industrial equipment. Using the coating protection and unused arrange ushering bearing more timken coating process include: PVD coating: physical vapor deposition ( 周围性血管疾病) Is a kind of vacuum deposition method, through this method, the solid produced by vaporizing atoms or molecules, these atoms or molecules in a vacuum, then in the form of a thin film deposition on the object. Usually these coating can maximum reduce the friction and wear. In laboratory studies, timken under the working conditions of oil free through the adoption of PVD coating has successfully implemented the bearing life up to 6 times of standard products. According to observation, use of the service life of the bearing of PVD layer technology about is unused coating roller bearing of nearly 10 times. Timken said the PVD coating process is a difficult, must operate within the world first-class production facilities, and USES the strict design and quality specification. Electrodeposition coating: electrodeposition coatings can provide excellent corrosion resistance to a wide range of applications. This type of coating is usually applied to undergo a lighter load bearing and non acidic environment. Corrosion degree depends on the type of coating and specific applications. Part coating can increase the wear life of the bearing, because they can contact surface hardening. Surface conversion coating: conversion film coating have excellent wear resistance and corrosion resistance at the same time, also can prevent the friction corrosion indentation ( Caused by the oscillation or vibration micro wear) 。 Although not as durable as PVD coating, they in order to improve the bearing performance provides another scheme, and often cost less than the high-end product options. For example, black oxide coating process in alkali bath, the bearing surface into oxide layer. This helps to keep lubricant in the steel surface, and slide along the roller easy to occur between the ring or skid will wear to a minimum. Spray coating, powder coating, and the dielectric coating spraying coating is mainly applied to arrange ushering bearing unit, auxiliary components and anticorrosive lining ring. The dielectric coating is available in current risk easily caused by bearing damage parts of the insulation, the arc suppression. Common conveyor, and other materials processing application arrange ushering bearing unit is a great applications to spray coating, can provide excellent corrosion resistance. Timken also remind you that for unqualified or size control of manufacture of bearing steel, these coatings cannot to improve its performance. Effective bearing solution begins with according to the geometrical characteristics of the specific application requirements for components and metallurgy chemical properties properly design, but also must adopt the appropriate methods on manufacturing and quality control process. Only in this way, advanced functional surface processing to provide the necessary customer specific advantages. The load, speed and temperature requirements beyond traditional bearing capacity conditions, the coating has its advantages. For example, a user from a lubricant change to another kind of lubricant, the results showed that the new surface wear is easy to cause adverse effects. Also, for example, the customer may want to use the low viscosity lubricant to improve equipment's energy efficiency, but it could damage the bearings. In these cases, the special coating can provide a cost-effective solution. Ultimately, all the customer's target is to prolong the life of the bearing to reduce maintenance.