Steel wire rod for furniture spring and production method of steel wire rod

Abstract

The invention relates to a steel wire rod for a furniture spring, which comprises the following main components in percentage by weight (wt%): 0.58-0.67 percent of C, 0.19-0.25 percent of Si, 0.60-0.68 percent of Mn and the balance of Fe. The steel wire rod further comprises the following residual components in percentage by weight (wt%): less than 0.027 percent of P, less than 0.012 percent of S, less than 0.04 percent of Cu, less than 0.03 percent of As, less than 0.028 percent of Sn, less than 0.03 percent of Ti, less than 0.005 percent of Nb, less than 0.0005 percent of B, less than 0.097 percent of Cr, less than 0.03 percent of Ni, less than 0.005 percent of V, less than 0.01 percent of Mo and less than 0.005 percent of Als. The steel wire rod has the characteristics of simple production process, low processing cost, excellent comprehensive performance and the like and can meet the requirement of wire rod raw materials of a mattress spring.

Description

technical field [0001] The invention belongs to the technical field of non-alloy steel and its manufacturing process, and relates to a steel wire rod for furniture springs and a production method thereof. Background technique [0002] With the development of my country's industrial economy and the improvement of people's quality of life, springs have become the most commonly used parts in the machinery industry and daily life, and various production processes and manufacturing methods of steel wire rods for springs have also emerged, such as: [0003] The Chinese patent document with the publication number CN101716721A discloses a production process of spring steel wire rod, which mainly includes the following processes: raw material preparation, EAF eccentric bottom tapping electric arc furnace smelting, LF refining outside the furnace, VD vacuum degassing treatment, CCM continuous casting, continuous casting slab shot blasting, flaw detection, grinding, heating and high-sp...

AI Technical Summary

Problems solved by technology

The substantial increase in the Si content of the alloying element not only wastes a large amount of Si alloy resources, but also greatly increases the cost of steel; and when the Si content is too high, it will reduce the plasticity and toughness of the steel, and it is prone to debonding during the rolling and heating process of the steel. Carbon tendency, easy to form inclusions, and deteriorate the fatigue resistance of spring steel

[0008] (2) Electric arc furnace smelting is adopted, which consumes more electric energy, and the cost of electric arc furnace smelting is obviously higher than that of converter smelting, and refining requires vacuum treatment, which greatly increases the cost of steelmaking

[0009] (3) The produced spring steel wire needs high temperature quenching and medium temperature tempering heat treatment, which increases the investment of downstream users in heat treatment equipment and the high operating cost of heat treatment process

For example, the spring steel wire of CN102162068A requires high-temperature quenching (850-910°C) and medium-temperature tempering (400-620°C), which require downstream users to increase investment in heat treatment equipment and high costs for heat treatment operations

Images