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Method for manufacturing low-hardness steel wire

A production method and low-hardness technology, applied in the direction of wire drawing dies, manufacturing tools, furnace types, etc., can solve the problems that the toughness and strength of steel wires cannot be guaranteed, the surface hardness of steel wire ropes is reduced, and the quality is unstable. The effect of stable product quality and low raw material prices

Active Publication Date: 2015-02-18
JIANGSU SAFETY STEEL WIRE ROPE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The outer wires of some elevator wire ropes began to use low-grade wires for wire drawing to reduce the surface hardness of the wire ropes. 42A high-quality carbon steel or even 37A high-quality carbon steel began to be used as raw materials for rope-making steel wires. The price of this steel is high. The production is difficult, and because of the low steel grade, the toughness and strength of the steel wire cannot be guaranteed in the steel wire drawing, and the quality is not stable, especially in the water tank wire drawing machine, the relative sliding between the tower pulley and the steel wire has a great influence on the steel wire. Resilience matters a lot

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In the present embodiment, a kind of manufacturing method of low-hardness steel wire, it comprises the following steps:

[0021] Step 1: Select No. 45 hot-rolled normalized high-quality carbon steel, which is more common, less difficult to produce, and relatively lower in price.

[0022] Step 2: The above-mentioned wire rods are drawn with a wire drawing machine for the first time, and in this drawing, the wire rods are directly drawn with a dry wire drawing machine.

[0023] Step 3: heating and quenching the steel wire drawn for the first time, and then surface-treating to obtain a sorbite quenched steel wire. Heating is divided into

[0024] Heating for a period of time: temperature 970°C, time 2 minutes;

[0025] Heating stage 2: temperature 950°C, time 2 minutes;

[0026] Three stages of heating: temperature 940°C, time 2 minutes;

[0027] Soaking section: temperature 920°C, time 2 minutes;

[0028] Step 4. Draw the quenched steel wire obtained by the above hea...

Embodiment 2

[0036] In the present embodiment, a kind of manufacturing method of low-hardness steel wire, it comprises the following steps:

[0037] Step 1: Select No. 45 hot-rolled normalized high-quality carbon steel.

[0038] Step 2: The above-mentioned wire rods are drawn with a wire drawing machine for the first time, and in this drawing, the wire rods are directly drawn with a dry wire drawing machine.

[0039] Step 3: heating and quenching the steel wire drawn for the first time, and then surface-treating to obtain a sorbite quenched steel wire. Heating is divided into

[0040] Heating for a period: temperature 980°C, time 1.5 minutes;

[0041] Heating stage 2: temperature 960°C, time 1.5 minutes;

[0042] Three stages of heating: temperature 950°C, time 1.5 minutes;

[0043] Soaking section: temperature 930°C, time 1.5 minutes;

[0044] Step 4. Draw the quenched steel wire obtained by the above heat treatment. In this drawing, the compression rate of the outer layer wire used ...

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Abstract

The invention discloses a method for manufacturing a low-hardness steel wire. The method comprises the following steps of a, selecting a wire rod; b, performing primary drawing on the wire rod through a wire drawing machine; c, performing heating, quenching and surface treatment on the steel wire subjected to the primary drawing to obtain a sorbitic treatment quenching steel wire; d, performing drawing on the quenching steel wire obtained through the heat treatment; e, performing heating, quenching and surface treatment on the steel wire subjected to the secondary drawing to finally obtain a sorbitic treatment quenching steel wire; and f, performing drawing on the quenching steel wire obtained through the heat treatment to manufacture the required steel wire. The hardness range of the steel wire manufactured by the method for manufacturing the low-hardness steel wire is from 340HV to 360HV. The toughness and the strength of the steel wire can be ensured, the product quality is stable, the production difficulty is small, and the prices of raw materials are low. By utilizing the low-hardness steel wires to make elevator steel wire ropes, friction on traction sheaves caused by the elevator steel wire ropes is reduced, and service life of the traction sheaves and the elevator steel wire ropes can be greatly prolonged.

Description

technical field [0001] The invention relates to a method for manufacturing a steel wire, in particular to a method for manufacturing a low-hardness steel wire for an elevator wire rope. Background technique [0002] At present, the national standard elevator wire rope does not require the surface hardness of the steel wire rope. The actual test shows that the surface hardness of the elevator wire rope required by the national standard is at least 400HV, while the hardness of the traction sheave is mostly lower than 300HV. There is a big difference between the two. Wheel wear is severe. The outer wires of some elevator wire ropes began to use low-grade wires for wire drawing to reduce the surface hardness of the wire ropes. 42A high-quality carbon steel or even 37A high-quality carbon steel began to be used as raw materials for rope-making steel wires. The price of this steel is high. The production is difficult, and because of the low steel grade, the toughness and strength...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C1/02B21C3/02C21D8/06C21D1/18C21D9/52
Inventor 杨岳民周绍兵钱悦
Owner JIANGSU SAFETY STEEL WIRE ROPE
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