High Strength Blackened Bolt Blackening process is blackening during tempering in heat treatment process. Different blackening process will directly affect the quality of screws. Attention should be paid to the following problems in the treatment process of high strength blackened bolt: Acid and alkali substances are strictly prohibited, which will damage the film-forming function of [...]
Appearance requirements for blackening of high strength bolts: 1. The appearance of blackening treatment is blue black or dark black. 2. The film crystallizes compactly and evenly, and the product has no bottom exposure, obvious color difference, whitening and other abnormal phenomena. If the blackening treatment of high strength blackened bolt is abnormal, the following [...]
Anti corrosion treatment method of hexagon socket bolts surface In the production of hexagon socket bolts, one of the most important links is to carry out anti-corrosion treatment on the surface. You may ask "how to carry out anti-corrosion treatment?" in fact, different corrosion conditions lead to different anti-corrosion treatment methods. Today, we will briefly [...]
Heat treated high strength fastener should be quenched and tempered according to the technical requirements. The purpose of heat treatment and tempering is to improve the comprehensive mechanical properties of fasteners to meet the specified tensile strength and yield ratio of products. Heat treatment process has a vital impact on high-strength fasteners, especially its internal [...]
Heavy duty hexagon bolt: 1. Standard: A325M 2. Grade: 4.8 / 5.8 / 6.8 / 8.8 / 10.9 / 12.9 , grade 2 / 5 / 8 3. Specification: m6-m24, 1 / 4 inch-1 inch 4. Length: 10mm-270mm, 1 / 2 inch-10 inches 5. Surface treatment: natural color, blackening, galvanizing, hot galvanizing, Dacromet 6. Packing: [...]