The longest fatigue life is the main basis for judging the advanced technology of wire rope manufacturing. The fatigue life of wire rope can be verified and compared by fatigue test. A structural steel wire rope, such as 8 * 19s+NF- 12mm smooth elevator wire rope and phosphating coated wire rope, was purchased from several manufacturers and tested on the same fatigue testing machine until the first strand broke, and the fatigue test times were recorded. The existing fatigue test data show that the phosphating coated steel wire rope has the longest fatigue life, and the fatigue test can check the comprehensive quality of steel wire rope. The service life of wire rope is proportional to the fatigue life. YB/T4288-20 12 Bending fatigue test method of steel wire rope for elevator, and the fatigue test is carried out according to the standard.
The fatigue test results show that the patented technology of phosphating coated steel wire rope is the most advanced technology in the world, and the fatigue life of manganese phosphating coated steel wire rope is 3-4 times that of smooth steel wire rope with the same structure, which can be verified and compared through fatigue test. At present, there is no wire rope with the same structure whose fatigue life can exceed that of phosphating coated wire rope, so the patented technology of phosphating coated wire rope is the most advanced technology, at least in the field of wire rope in the world at present. Manganese phosphating film can improve the wear resistance and corrosion resistance of steel gear surface of automobile gearbox, and prolong the service life of steel wire rope by using this principle.
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