How to choose screw grease?
source:本站Popularity:2682Time:2016-01-20 15:15:45【小中大】
The most common machine parts screw, correct selection of the most suitable screw grease, it is necessary to choose according to screw material or surface thread and use conditions. So under the condition of high temperature working, with a special resistance to high temperature grease for lubrication of screw connections. These grease base oil and different solid lubricant mixed and contain other additives. In lubricating paste formulation or for the selection of grease, it is important to note that no sulfur, zinc, lead and aluminum or screw will damage occurs, such as high temperature will occur stress corrosion fracture resistance.
Such high temperature resistant screws are generally composed of austenitic materials and nickel, molybdenum alloy components, so that the screw can only form a thin oxide layer to generate high friction coefficient, but also easy to glue. Through the development of a pressure membrane separation, modern high temperature grease to prevent this problem, reduce the friction coefficient to the ideal value, and can prevent the oxidation of gas to enter. In addition to these properties, some lubricant must be suitable for low-temperature work occasions, it has special formulation to prevent friction coefficient corrosion and other accidents. The lubricating grease and grease containing a metal hydroxide, phosphate and sulfide is made of white solid lubricant.
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