Unlock instant, AI-driven research and patent intelligence for your innovation.

Production Technology of Spring Steel 60si2mn Hot Rolled Wire Rod for Automobile Suspension

A production process, hot-rolled wire rod technology, applied in the production process field of spring steel 60Si2Mn hot-rolled wire rod for automobile suspension, can solve the problems of increased production cost, long heating time, high heating temperature, etc., and achieve optimal rolling speed , Guarantee the organization and performance, the uniform effect of chemical elements

Active Publication Date: 2020-06-30
HANDAN IRON & STEEL GROUP +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method solves the problem of surface decarburization, the overall heating time is longer and the heating temperature is higher, which increases the production cost

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Production Technology of Spring Steel 60si2mn Hot Rolled Wire Rod for Automobile Suspension
  • Production Technology of Spring Steel 60si2mn Hot Rolled Wire Rod for Automobile Suspension
  • Production Technology of Spring Steel 60si2mn Hot Rolled Wire Rod for Automobile Suspension

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The production process of spring steel 60Si2Mn hot-rolled wire rod for automobile suspension in this embodiment includes hot metal pretreatment, converter smelting, LF refining, RH vacuum treatment, continuous casting, blooming, casting slab grinding, wire rod rolling process, and the specific process The steps are as follows:

[0027] (1) Hot metal pretreatment process: After hot metal pretreatment, S: 350ppm;

[0028] (2) Converter smelting process: the converter scrap ratio is controlled at 15%; when tapping, the infrared slide board + slag stop cone double gear is used to strictly control the slag, and 12.0kg / t steel SiMn and 17.0kg / t steel are added during tapping. Ferrosilicon is precipitated, deoxidized and alloyed, and 3.0kg / t steel of synthetic refined slag is added along the steel flow at 1 / 2 of the tapping time;

[0029] (3) LF refining process: using aluminum-free deoxidation, adding 1.1kg / t steel SiC diffusion deoxidation, adding 5.4kg / t steel active lime, 1.2kg / ...

Embodiment 2

[0039] The production process of the spring steel 60Si2Mn hot-rolled wire rod for automobile suspension in this embodiment includes hot metal pretreatment, converter smelting, LF refining, RH vacuum treatment, continuous casting, blooming, casting slab grinding, wire rod rolling process, and the specific process The steps are as follows:

[0040] (1) Hot metal pretreatment process: After hot metal pretreatment, S: 320ppm;

[0041] (2) Converter smelting process: the converter scrap ratio is controlled at 19%; when tapping, the infrared slide board + slag stop cone double gear is used to strictly control the slag, and 13.0kg / t steel SiMn and 18.0kg / t steel are added in the tapping process. Ferrosilicon is precipitated, deoxidized and alloyed, and 3.0kg / t steel of synthetic refined slag is added along the steel flow at 1 / 2 of the tapping time;

[0042] (3) LF refining process: using aluminum-free deoxidation, adding 1.1kg / t steel SiC diffusion deoxidation, adding 5.4kg / t steel active ...

Embodiment 3

[0051] The production process of the spring steel 60Si2Mn hot-rolled wire rod for automobile suspension in this embodiment includes hot metal pretreatment, converter smelting, LF refining, RH vacuum treatment, continuous casting, blooming, casting slab grinding, wire rod rolling process, and the specific process The steps are as follows:

[0052] (1) Hot metal pretreatment process: After hot metal pretreatment, S: 350ppm;

[0053] (2) Converter smelting process: the converter scrap ratio is 13%; when tapping, the infrared slide board + slag stop cone double gear is used to strictly control the slag. The tapping process adds 10.0kg / t steel SiMn and 15.0kg / t steel silicon Iron precipitation is deoxidized and alloyed, and 3.5kg / t steel of synthetic refined slag is added along the steel flow at 1 / 2 of the tapping time;

[0054] (3) LF refining process: using aluminum-free deoxidation, adding 1.1kg / t steel SiC diffusion deoxidation, adding 5.2kg / t steel active lime, 1.1kg / t steel fluorit...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a production technology of a spring steel 60Si2Mn hot-rolled wire rod for an automotive suspension. The production technology comprises the steps of a hot metal pretreatment working procedure, a converter smelting working procedure, an LF refining working procedure, an RH vacuum treatment working procedure, a continuous casting working procedure, a cogging working procedure, an ingot blank polishing working procedure and a wire rod rolling working procedure. According to the production technology, the generation of AL2O3 inclusion is controlled from the source by meansof hot metal pretreatment desulfurization, silicon iron deoxygenation, silicon carbide diffusion deoxygenation and wollastonite and active lime slag formation; by the adoption of special carburant andspecial silicon iron, the content of nitrogen and the content of titanium in steel are controlled, argon protection in the whole process and the sufficient standing time are adopted, the situation that the inclusion fully and upwards floats is guaranteed, and D and Ds inclusion in the molten steel is controlled; by means of large ladle slag detection and special covering slag, the phenomenon thatthe molten steel is subjected to secondary pollution can be completely eradicated, and a good effect of thermal-insulating adsorption of the inclusion can be achieved; by means of the stir and soft press operation of a large rectangular blank crystallizer, the internal quality of an ingot blank is ensured; and in the rolling process, due to the optimization of the rolling speed and the control over the rolling temperature, the structure and the performance of a finished product are guaranteed.

Description

Technical field [0001] The invention belongs to the technical field of special hot-rolled wire rod production, and specifically relates to a production process of spring steel 60Si2Mn hot-rolled wire rod for automobile suspension. Background technique [0002] 60Si2Mn is one of the most widely used and produced spring steel grades in China. It is mainly used in the transportation industry for shock-absorbing springs of automobiles and tractors. The spring bears alternating stress for a long time, so fatigue fracture is the main form of failure. Because springs have very high requirements for fatigue life and reliability, the physical quality requirements for spring steel wires are very strict. Decarburization of the spring steel surface will seriously damage the fatigue performance of the spring. The fatigue strength decreases with the decrease of the surface carbon content. For example, the full decarburization of ferrite on the surface of the spring steel can reduce the fatigu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/34C22C38/42C22C38/06C21D8/06C21C7/00C21C7/06C21C7/10
CPCC21C7/0006C21C7/0025C21C7/0068C21C7/06C21C7/10C21D8/065C22C38/002C22C38/02C22C38/04C22C38/06C22C38/34C22C38/42Y02P10/20
Inventor 许斌郝志超徐斌肖国华赵江孙俊喜申文军李国涛
Owner HANDAN IRON & STEEL GROUP