This technology is patented. At present, only a few enterprises in China have purchased authorized legal production, and the supply of products is in short supply, so it is natural to work overtime to strive for more profits.
The unit use cost of steel wire rope can be calculated by dividing the cost of buying steel wire rope by the number of days of use, that is, calculating yuan/day. Or divide the purchase cost of wire rope by the tonnage of the lifted goods, that is, calculate yuan/ton of goods. If it is container transportation, it can be calculated as yuan/box. Based on this data, we can compare which wire rope is used for more accounting. Cheap steel wire rope does not mean low use cost, and expensive steel wire rope does not mean high use cost. Manganese phosphating coated steel wire rope is recommended. Phosphating coated wire rope is a patented technology, which can be used to produce all kinds of wire ropes. Some enterprises have produced this kind of wire rope, which is very suitable for cranes, especially cranes that are often used, such as gantry cranes for container loading and unloading in ports.
Commonly used steel wire ropes include phosphating coated steel wire rope, galvanized steel wire rope, stainless steel wire rope or plastic coated steel wire rope, which are used in atmospheric environment. Manganese phosphating coated steel wire rope produced by patented technology has the longest service life, and hot dip galvanized-phosphating double coated steel wire rope is preferred in heavy corrosive environment.
Phosphating coated steel wire rope produced by patented technology gives priority to manganese series or zinc-manganese series phosphating. Compared with the production process of smooth steel wire rope, only the final wear-resistant phosphating process is added, which greatly improves the wear resistance and corrosion resistance of steel wire rope. The phosphatized steel wire rope is directly cold-drawn and twisted. At present, the fatigue test data show that the fatigue life of phosphating coated steel wire rope is about 3-4 times that of smooth steel wire rope with the same structure (under comparable conditions in laboratory), and it is still possible to improve it greatly with the research of wear-resistant phosphating formula. Manganese phosphating is wear-resistant phosphating, which can solve the wear problem of steel wire rope in use. Smooth steel wire rope is being eliminated, because phosphating coated steel wire rope is in short supply at present.
The price of phosphating coated wire rope is higher than that of smooth wire rope, but the unit use cost is lower than that of smooth wire rope. At present, the test data prove that the fatigue life of phosphating coated steel wire rope is 3-4 times that of smooth steel wire rope, and the service life of steel wire rope is proportional to the fatigue life. According to the approximate price of wire rope market, the price of manganese phosphating coated wire rope is about 1.4- 1.6 times that of smooth wire rope, and the service life is much longer than the price increase. Therefore, the daily average service cost of phosphating coated steel wire rope is only 30-45 times that of smooth steel wire rope.