Method for producing high-speed mute and durable steel wire ropes for elevators

Abstract

The invention belongs to the field of application of steel for steel wire ropes, in particular to a method for producing high-speed mute and durable steel wire ropes for elevators. The steel for the steel wire ropes comprises the chemical components in mass percentage: 0.64-0.69% of C, 0.10-0.30% of Si, 0.30-0.60% of Mn, at most 0.020% of P, at most 0.010% of S and the balance of Fe and unavoidable impurities, wherein the target mass percentage of a part of chemical components is as follows: 0.65% of C, 0.50% of Mn and 0.15% of Si; and the size of the impurities is controlled by below 8mu m. The method comprises the following steps: (1) descaling and drawing a steel wire rod prepared from the steel components for the first-time annealing, drawing again for the second-time annealing, then drawing to obtain steel wires, wherein the drawing pass after the second-time annealing is 6, and finally standing the steel wires to form a semi-finished product of steel wire rope for elevators; (2)plastic-coating the semi-finished product of steel wire rope for elevators to form a flat ribbon, wherein the thickness of the flat ribbon is 3mm, and thus obtaining the high-speed mute and durable steel wire rope for elevators. The steel wire rope for elevators produced by the method has the advantages of high strength, muteness, durability, and the method has a simple process and is suitable forproduction application.

Description

technical field [0001] The invention belongs to the application field of steel for steel wire ropes, and specifically provides a production method for high-speed quiet and durable elevator steel wire ropes. Background technique [0002] The elevator car runs under the traction of the elevator wire rope. The elevator wire rope runs smoothly, has low noise, is not easy to break and is durable, which are the basic requirements of high-speed elevators. [0003] Depend on figure 1 As shown, the traditional elevator wire ropes are made of strands with a diameter of 0.47mm to 0.81mm through stranding, with an outer diameter of 12 to 16mm and a tensile strength of 1570MPa. figure 2 It is the cross section of the elevator wire rope. This kind of wire rope is in point contact with the drum when running, and the stress on the drum is as follows: image 3 shown. It can be seen from the figure that the metal point farthest from the drum bears the largest bending stress, and the stre...

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Problems solved by technology

Both of these points will cause damage to the steel wire, resulting in a reduction in the life of the steel wire

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