Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Production method of plastic die steel ZW636

A ZW636, plastic mold steel technology, applied in the direction of improving process efficiency and manufacturing converters, can solve the problems of reducing production costs, large temperature drop of molten steel, low purity of molten steel, etc., to reduce production costs and overcome temperature drop of molten steel big effect

Active Publication Date: 2021-11-23
CHENGDE JIANLONG SPECIAL STEEL
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the above technical problems, the present invention provides a production method of plastic mold steel ZW636. The production method sequentially carries out vanadium extraction blowing, desulfurization, converter steelmaking, ladle refining, vacuum refining, round billet continuous casting to vanadium-containing molten iron and cast slab slow cooling to obtain plastic mold steel ZW636. In the production method, semi-steel is mixed in converter steelmaking, nickel-containing pig iron is added, and additional scrap steel is not added. The temperature of the converter blowing process is used to melt nickel-containing pig iron to improve the converter. The nickel content at the end point can overcome the deficiencies in the prior art, such as the large temperature drop of molten steel after alloy addition, rapid slagging and temperature rise in ladle refining, low purity of molten steel, and defects in the internal and surface quality of continuous casting large round billets, and can greatly reduce production. cost, and can produce ZW636 large round blanks that meet the needs

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0115] The present embodiment provides a kind of production method of described plastic mold steel ZW636, and described production method comprises the following steps:

[0116] (1) Carry out vanadium-containing molten iron blowing for 5.5 minutes, add vanadium-extracting materials at 1380°C, and the oxygen supply intensity of the converter is 2.2m 3 / t·min, keep the final temperature of vanadium extraction and blowing at 1380°C, in which vanadium extraction materials include 25kg / t and iron oxide scale 13kg / t;

[0117] Desulfurization agent after vanadium extraction and blowing, wherein the desulfurization agent includes 9kg / t lime powder, 1.3kg / t fluorite powder and 0.8kg / t aluminum powder, desulfurize for 13min under the first stirring at a rotation speed of 83r / min, Obtaining a desulfurized semi-steel with a sulfur content of 0.01wt%;

[0118] (2) Mixing the desulfurized rear semi-steel and nickel-containing pig iron described in step (1), wherein the addition of nickel-c...

Embodiment 2

[0125] The present embodiment provides a kind of production method of described plastic mold steel ZW636, and described production method comprises the following steps:

[0126] (1) Carry out vanadium-containing molten iron blowing for 5 minutes, add vanadium-extracting materials at 1360°C, and the oxygen supply intensity of the converter is 2.3m 3 / t·min, keep the final temperature of vanadium extraction blowing at 1360℃, in which vanadium extraction materials include 20kg / t and iron oxide scale 15kg / t;

[0127] Desulfurization agent after vanadium extraction and blowing, wherein the desulfurization agent includes 8kg / t of lime powder, 1.5kg / t of fluorite powder and 1kg / t of aluminum powder, and desulfurizes for 15min under the first stirring with a rotation speed of 80r / min to obtain Desulfurized semi-steel with sulfur content ≤0.01wt%;

[0128] (2) Mixing step (1) described desulfurization rear semi-steel and nickel-containing pig iron, wherein the add-on of nickel-contain...

Embodiment 3

[0135] The present embodiment provides a kind of production method of described plastic mold steel ZW636, and described production method comprises the following steps:

[0136] (1) Carry out vanadium-containing molten iron blowing for 6 minutes, add vanadium-extracting materials at 1400°C, and the oxygen supply intensity of the converter is 2m 3 / t·min, keep the final temperature of vanadium extraction blowing at 1400℃, in which vanadium extraction materials include 30kg / t and iron oxide scale 10kg / t;

[0137] Desulfurization agent after vanadium extraction and blowing, wherein the desulfurization agent includes 10kg / t of lime powder, 1kg / t of fluorite powder and 0.5g / t of aluminum powder, and desulfurizes for 12min under the first stirring at a speed of 85r / min to obtain Desulfurized semi-steel with sulfur content ≤0.01wt%;

[0138] (2) Mixing the semi-steel and nickel-containing pig iron after desulfurization described in step (1), wherein the addition of nickel-containing...

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 provides a production method of plastic die steel ZW636. The production method comprises the following steps that vanadium extraction blowing and desulfurization are sequentially carried out on vanadium-containing molten iron to obtain desulfurized semi-steel; the desulfurized semi-steel and nickel-containing pig iron are mixed, and converter steelmaking, ladle refining and vacuum refining are sequentially carried out to obtain treated molten steel; and the treated molten steel is sequentially subjected to round billet continuous casting and casting billet slow cooling, and the plastic die steel ZW636 is obtained. According to the production method, semi-molten steel is added in converter steelmaking, the nickel-containing pig iron is added, extra scrap steel is not added, the end-point nickel content of a converter is increased, the defects that in the prior art, after alloy is added, molten steel temperature drop is large, slagging and heating are rapid in ladle refining, the molten steel purity is low, and the internal quality and the surface quality of a continuous casting large round billet have defects can be overcome, and the production cost can be greatly reduced.

Description

technical field [0001] The invention relates to the technical field of plastic mold steel ZW636, in particular to a production method of plastic mold steel ZW636. Background technique [0002] Plastic mold steel is a kind of mold steel used for plastic production. Plastic mold materials are mainly mold steel. The development of mold steel has promoted the development of industrial products in the direction of advanced, diversified, personalized and high added value. However, the existing technology has problems such as large temperature drop of molten steel after alloy addition, rapid slagging and temperature rise during ladle refining, low purity of molten steel, and defects in internal and surface quality of continuous casting blooms. [0003] CN110157984B discloses a high-uniformity and high-polishing plastic mold steel ZW636 and its preparation method. The preparation method includes electrode billet softening annealing, protective atmosphere electroslag remelting, elec...

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
IPC IPC(8): C22C33/06C21C5/28C21C7/06C21C7/064C21C7/10
CPCC22C33/06C21C7/0645C21C5/28C21C7/06C21C7/10Y02P10/20
Inventor 王雪原张国东巩飞董诗朋尹修刚司瑞强邢伟高宏亮王志利柴嘉悦
Owner CHENGDE JIANLONG SPECIAL STEEL
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com