The phosphating treatment of the steel wire is preferentially phosphating with manganese or Zn-manganese. After the phosphating of the steel wire, no drawing process is carried out, and the phosphating steel wire is directly used to make the steel wire rope. The phosphating coating makes the steel wire surface more wear-resistant. Moreover, the service life of corrosion-resistant, phosphate-coated steel wire rope is 2-3 times that of smooth steel wire rope, and the fatigue resistance of steel wire rope is greatly improved. With the in-depth study on the formulation of wear-resistant and corrosion-resistant phosphating solution, phosphate coated steel wire rope The fatigue life is also greatly increased. Phosphated coated steel wire rope is an upgraded product of smooth steel wire rope, and it is fully capable of replacing imported steel wire rope. Wire rope fatigue life measurement method and fatigue life length comparison To determine the fatigue life, it is necessary to use a wire rope fatigue testing machine to measure the fatigue life according to the national standard GB/T12347-2008 wire rope bending fatigue test method. Determining the fatigue life of steel wire ropes for elevators, according to industry standards, YB/T4288-2012 wire rope bending fatigue test method for elevators. The manganese-based phosphating coated steel wire rope of the same diameter, structure and performance and the smooth surface steel wire rope were tested on a fatigue testing machine until the first broken strand appeared, the fatigue life was recorded, and then the test data was compared. The test data proves that the fatigue life of the manganese-based phosphating coated steel wire rope is 3-5 times that of the smooth steel wire rope. The manganese-based phosphating film is extremely wear-resistant and has good corrosion resistance. This is the fatigue life of the manganese-based phosphating coated steel wire rope. The reason for the improvement. There are many structural specifications of steel wire ropes, and the fatigue life improvement range is different. If there is a fatigue testing machine, it is recommended to measure the fatigue life of manganese-based phosphating coated steel wire rope and smooth steel wire rope, and then compare. In general, the longer the fatigue life, the longer the service life, and they are proportional.
The scope of application of phosphating steel wire rope. During the phosphating process, some materials are dissolved. When the phosphating film weight is between 3g/m2 and 15g/m2, the diameter of the phosphating steel wire is almost constant; when the phosphating film weight exceeds 20g/m2, the steel wire The diameter increase value is also very limited, and the mechanical properties of the steel wire do not change significantly before and after phosphating (hydrogen removal is required to prevent hydrogen embrittlement). This feature makes the phosphating steel wire rope technology suitable for all kinds of wire rope products, especially those with strict requirements on fatigue resistance, such as elevator wire rope, wire rope for port loading and unloading machine, mine wire rope, aviation wire rope, oil machine Wire ropes and hoisting wire ropes for all types of cranes, etc., and there is no conflict with the current national standards for all wire ropes, that is, the phosphating coated steel wire rope can fully comply with the current technical requirements of the relevant national standards for wire ropes or industry standards.