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

4140 plastic die steel plate with delivery in annealed state and production method of 4140 plastic die steel plate

A technology of plastic mold and production method, applied in the field of plastic mold steel, can solve the problems of long process time, high energy consumption, not suitable for the production of medium and heavy plate products, etc. Effect

Active Publication Date: 2018-06-15
TANGSHAN IRON & STEEL GROUP +1
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The 4140 die steel delivered in the traditional annealed state adopts the isothermal annealing process, which takes a long time and consumes a lot of energy, which is not suitable for the production of medium and thick plate products

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

[0020] The thickness of the 4140 plastic mold steel plate delivered in the annealed state of this embodiment is 10 mm, and its chemical composition and mass percentage are: C: 0.38%, Mn: 0.75%, Si: 0.15%, S: 0.015%, P: 0.020 %, Cr: 0.80%, Mo: 0.15%, Al: 0.005%, and the rest are iron and unavoidable impurities.

[0021] The production method of the 4140 plastic mold steel plate delivered in the annealed state of this embodiment includes converter smelting, LF furnace refining, RH vacuum refining, continuous casting slab, controlled rolling and controlled cold rolling, high temperature tempering heat treatment process, and the specific process steps are as follows Said:

[0022] (1) Converter smelting process: into the molten iron in the converter, the sulfur content is 0.050%, and ferromolybdenum is added to the converter at 3.5kg / t steel and scrap steel; the carbon at the end of converter smelting is 0.10%, and the converter begins to tap 1 / 4 of the time Add steel sand alumin...

Embodiment 2

[0030] The thickness of the 4140 plastic mold steel plate delivered in the annealed state in this embodiment is 150 mm, and its chemical composition and mass percentage are: C: 0.43%, Mn: 1.00%, Si: 0.35%, S: 0.015%, P: 0.020 %, Cr: 1.10%, Mo: 0.25%, Al: 0.025%, and the rest are iron and unavoidable impurities.

[0031] The production method of the 4140 plastic mold steel plate delivered in the annealed state of this embodiment includes converter smelting, LF furnace refining, RH vacuum refining, continuous casting slab, controlled rolling and controlled cold rolling, high temperature tempering heat treatment process, and the specific process steps are as follows Said:

[0032] (1) Converter smelting process: The molten iron in the converter has a sulfur content of 0.060%. After pretreatment of the molten iron, it is loaded into the furnace. Ferromolybdenum is added to the converter at a rate of 3.8kg / t steel and scrap steel; the carbon at the end of converter smelting is 0.20...

Embodiment 3

[0040] The thickness of the 4140 plastic mold steel plate delivered in the annealed state of this embodiment is 100 mm, and its chemical composition and mass percentage are: C: 0.41%, Mn: 0.90%, Si: 0.30%, S: 0.015%, P: 0.020 %, Cr: 1.00%, Mo: 0.20%, Al: 0.020%, and the rest are iron and unavoidable impurities.

[0041] The production method of the 4140 plastic mold steel plate delivered in the annealed state of this embodiment includes converter smelting, LF furnace refining, RH vacuum refining, continuous casting slab, controlled rolling and controlled cold rolling, high temperature tempering heat treatment process, and the specific process steps are as follows Said:

[0042] (1) Converter smelting process: into the molten iron in the converter, the sulfur content is 0.040%, and ferromolybdenum is added to the converter at 3.8kg / t steel and scrap steel; the carbon at the end of converter smelting is 0.15%, and the converter begins to tap 1 / 4 of the time Add steel sand alumi...

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

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a 4140 plastic die steel plate with delivery in an annealed state and a production method of the 4140 plastic die steel plate. The plastic die steel plate is prepared from thefollowing chemical compositions in percentage by mass: 0.38-0.43 percent of C, 0.75-1.00 percent of Mn, 0.15-0.35 percent of Si, smaller than or equal to 0.015 percent of S, smaller than or equal to 0.020 percent of P, 0.80-1.10 percent of Cr, 0.15-0.25 percent of Mo, 0.005-0.025 percent of Al and the balance of iron and inevitable impurities. The production method comprises the following procedures of converter smelting, LF furnace refining, RH vacuum refining, continuous casting slab, controlled rolling and cooling rolling and high-temperature tempering heat treatment. According to the production method provided by the invention, the Al content is controlled to be 0.005-0.025 percent, other precious alloying elements such as Nb, Ti and V are not added, and the hardness of the steel plateis smaller than or equal to 230HB by adopting a high-temperature tempering heat treatment technology, so that the technology is simple, and the production cost is effectively lowered.

Description

technical field [0001] The invention belongs to the technical field of plastic mold steel, and in particular relates to a 4140 plastic mold steel plate delivered in an annealed state and a production method thereof. Background technique [0002] Plastic mold steel, as a molding mold material for the manufacture of plastic and rubber products, is widely used in the manufacture of plastic products in various industries such as household appliances, electronic communication equipment, living utensils, and vehicles. [0003] AISI 4140 plastic mold steel is a plastic mold steel with low alloy content and cost advantages. When delivered in the annealed state, the hardness is generally required to be ≤230HB. The 4140 die steel delivered in the traditional annealed state adopts the isothermal annealing process, which takes a long time and consumes a lot of energy, which is not suitable for the production of medium and thick plate products. Contents of the invention [0004] The ...

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): C22C38/04C22C38/02C22C38/06C22C38/22C21C7/10C21D1/18
CPCC21C7/10C21D1/18C22C38/02C22C38/04C22C38/06C22C38/22
Inventor 任树洋李行尹绍江秦坤王云阁石晓伟张锦兴万焱刘志勇
Owner TANGSHAN IRON & STEEL GROUP
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