Cheese head studs for the so-called refers to a connection of high-strength steel fasteners, is one of the important parts of machinery, so when you use be sure to perform regular maintenance, so as to better protect the cylinder head studs fastening performance, so as to keep machine in good condition. The cylinder head studs fasteners maintenance needs to pay attention to what you do?
Pollution occurs, rinse
Fastener after the hardening Portland detergent is needed, then rinse, rinse time be very careful to avoid residues.
B accumulation, fasteners are not reasonable
Having been tempered fasteners will show traces of color with ether can can have oily residue after soaking, clarify fastener appearance is not clean. Analysis showed that fasteners heat accumulation is not reasonable, rendered small fasteners in quenching oil oxidation.
Third, surface residues
High strength bolts with white residue, instrument analysis, phosphides confirmed. This response is due to the acidic cleaner to clean and rinse tank view not completely.
Four, alkali burn
Waste heat from high-strength screw hardened black uniform, flat black exterior appearance. By testing for alkali burns. Therefore, in iron and steel fasteners in quenching oil cannot get rid of the appearance of alkaline, so as to make appearances at high temperature burn, and aggravated damage when tempered. Claims to thoroughly clean and rinse the fastener before heat treatment, completely remove the fasteners burn alkaline residue.
Five improper, rinsing
About standard fasteners tend to use aqueous quenching, quenching with alkaline cleaning machine before cleaning and rinsing, hardened fasteners have rust on the inside. So often swap rinsing with water, ensure that the fasteners in the rinsing will not rust.
Six, excessive corrosion
High strength fasteners often see some black stripes, the black stripe for the appearance of pollutants residues, for quenching oil dried up, is in the gas-phase quenching process of evolution. Due to excessive aging of quenching oils, so that new oil