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Manufacturing process of spring steel wire rod

A production process, spring steel technology, applied in the field of metallurgy, can solve the problems of poor plasticity and toughness, complex production process, high production cost, etc., and achieve the effect of good physical quality, high dimensional accuracy and high production efficiency

Inactive Publication Date: 2010-06-02
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing raw material of spring steel wire rod is made into elastic rod by thermal processing, the production process is relatively complicated, the energy consumption is high, the carbon content, plasticity and toughness are not very good, and the production cost is high.

Method used

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  • Manufacturing process of spring steel wire rod

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The production process of 38Si7 spring steel wire rod is characterized in that it 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-speed wire rolling mill rolling into wire rod.

[0018] Raw material preparation process: the furnace charge is composed of high-quality steel scrap, molten iron and pig iron, and the composition is as follows (Wt%):

[0019] Table 2

[0020] C

mn

P

S

Si

Cr

Al

Cu

Fe

0.35

0.50

0.025

0.025

1.50

0.35

0.050

0.20

margin

[0021] Control the total amount of harmful residual elements within 0.25%; add 38% of molten iron in each furnace; keep all raw materials in the furnace dry, and add the alloy after baking. ...

Embodiment 2

[0029] The production process of 38Si7 spring steel wire rod is characterized in that it 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-speed wire rolling mill rolling into wire rod.

[0030] Raw material preparation process: the furnace charge is composed of high-quality steel scrap, molten iron and pig iron, and the composition is as follows (Wt%):

[0031] table 3

[0032] C

mn

P

S

Si

Cr

Al

Cu

Fe

0.4

0.7

0.020

0.020

1.70

0.3

0.040

0.15

margin

[0033] Control the total amount of harmful residual elements within 0.25%; add 40% of molten iron to each furnace; keep all raw materials in the furnace dry, and add the alloy after baking.

...

Embodiment 3

[0041] The production process of 38Si7 spring steel wire rod is characterized in that it 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-speed wire rolling mill rolling into wire rod.

[0042] Raw material preparation process: the furnace charge is composed of high-quality steel scrap, molten iron and pig iron, and the composition is as follows (Wt%):

[0043] Table 4

[0044] C

mn

P

S

Si

Cr

Al

Cu

Fe

0.42

0.80

0.015

0.018

1.80

0.30

0.040

0.1

margin

[0045] Control the total amount of harmful residual elements within 0.25%; add 45% of molten iron to each furnace; keep all raw materials in the furnace dry, and add the alloy after baking. ...

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Abstract

The invention belongs to the field of metallurgy and discloses a manufacturing process of a spring steel wire rod, which comprises the following steps: preparing raw materials, smelting the raw materials in an EAF eccentric bottom tapping electric arc furnace, refining the raw materials outside an LF furnace, performing vacuum degassing (VD) treatment, performing CCM continuous casting, performing shot blasting on a continuous casting billet, performing flaw detection, polishing, heating and rolling to manufacture the steel wire rod by a high-speed wire-rod rolling mill. The manufacturing process of the invention has the advantages of simple process, low energy consumption, less investment equipment and high production efficiency; and compared with the spring steel wire rod used by the traditional domestic railway spring strip, the spring steel wire rod of the invention has the advantages of low carbon content, good plasticity and toughness, delivery in the form of the steel wire rod, high size precision and yield, and good quality of a real object, capacity of being machined into the steel wire rod, and low manufacturing cost.

Description

technical field [0001] The invention belongs to the field of metallurgy and relates to a production process of wire rods, in particular to a production process of spring steel wire rods. Background technique [0002] In the existing domestic railway clip technology, 60Si2MnA and 60Si2CrA spring steels are generally used as materials for making railway clips. The existing spring steel wire rod raw material is thermally processed into elastic rods, the production process is relatively complicated, the energy consumption is high, the carbon content, plasticity and toughness are not very good, and the production cost is high. Contents of the invention [0003] The technical problem to be solved by the present invention is to propose a production process for spring steel wire rods, which has simple process, low energy consumption, low equipment investment, high production efficiency, good product quality, and can Cold processed into wire rod, low manufacturing cost. [0004] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P17/00C22C38/34C21C5/52C21C7/072B22D11/16B21B37/74
CPCY02P10/20
Inventor 王德炯沈朴恒
Owner NANJING IRON & STEEL CO LTD
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