1. Phosphated coated steel wire rope (patented product). The steel wire has been treated with manganese or zinc-manganese phosphating. The surface of the steel wire is very wear-resistant, effectively inhibiting the occurrence of fretting wear. It is the best choice for smooth steel wire ropes. The service life of upgraded products in the atmospheric environment far exceeds that of smooth steel wire ropes of the same structure, including steel wire ropes imported from developed countries such as Germany and Japan (the current phosphated rope is about three times that of smooth rope, and it may be significantly improved in the future. Verify and compare through fatigue test. The phosphate coating is 3-60 g/m2. After phosphating, the steel wire is no longer drawn and the wire rope is directly twisted. Note - do not confuse phosphating for drawing with phosphating for rope making. ), foreign countries are already copying China’s innovative wire rope technology. This innovative technology is suitable for almost all types of steel wire ropes, such as elevator wire ropes, important-purpose steel wire ropes, etc. (Baidu library has free downloads of phosphate-coated steel wire rope papers).
2. Galvanized steel wire ropes include hot-dip galvanizing and electro-galvanizing. Hot-dip galvanizing has a thicker zinc layer and has a longer service life, while electro-galvanizing is thinner. The thicker the zinc layer, the stronger the corrosion resistance. Since the phosphating coating has certain anti-corrosion properties, manganese-based phosphating coated steel wire ropes can be used instead of some types of thin zinc layer galvanized steel wire ropes, such as the Class B galvanized layer in GB8918-2006.
3. Stainless steel wire rope, which is made of twisted stainless steel wire, such as 304 or 316 stainless steel, is relatively expensive. The stainless steel wire is treated with a manganese phosphating coating (phosphating of stainless steel wire requires special phosphorus. chemical formula), which can also greatly extend the service life.
4. Plastic-coated steel wire rope, based on high-quality carbon steel wire rope, coated with polyethylene or polypropylene on the outer layer of the steel wire rope or strand rope
5. Smooth steel wire rope, 1834 Production began in the United Kingdom, and my country began production and use at Tianjin No. 1 Steel Wire Rope Factory in 1939. As phosphate-coated steel wire ropes enter the market in large quantities, they will be completely replaced by phosphate-coated steel wire ropes.
A steel wire rope is a bundle of steel wires twisted together. To measure the diameter of the steel wire rope, you need to use a wide-mouth vernier caliper. Which spans two rope strands and is more than 15 meters away from the rope end in the vertical direction. Measure two respectively. The average value of the data is the diameter of the wire rope without tension.
There is a certain deviation in the diameter of the wire rope. Even if two adjacent points are measured, the data may be inconsistent. For example, the nominal diameter of the wire rope (i.e. nominal diameter) is 10mm. If the standard stipulates that the allowable deviation is 6, then , wire rope diameters between 10mm and 10.60mm are all qualified products, and the ovality is 0.30mm (same cross-sectional diameter, maximum value minus minimum value). Generally, wire rope standards are positive deviations, for reference only