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

Method for manufacturing large cake forgings of high-carbon and high-chromium cold working die steel

A cold work die steel, high carbon and high chromium technology, applied in metal processing equipment and other directions, can solve the problems of low yield, longitudinal cracks at the surface drum, high rejection rate of large cake forgings, and achieve uniform composition and reduced Side drum shape, easy to measure and control the effect

Active Publication Date: 2012-02-15
PANGANG GROUP JIANGYOU CHANGCHENG SPECIAL STEEL
View PDF7 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, when upsetting, the side of the billet is drum-shaped, and this uneven deformation is likely to cause longitudinal cracks at the drum-shaped part of the surface for low-plasticity steel.
[0008] The above problems lead to the high scrap rate and low yield of high-carbon high-chromium cold-working die steel large-scale cake forgings manufactured by the prior art method, only 20-30%

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
  • Method for manufacturing large cake forgings of high-carbon and high-chromium cold working die steel
  • Method for manufacturing large cake forgings of high-carbon and high-chromium cold working die steel
  • Method for manufacturing large cake forgings of high-carbon and high-chromium cold working die steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for manufacturing a high-carbon and high-chromium cold-work die steel large-scale cake forging, comprising the following steps:

[0032] a. Smelting: The primary smelting of electric furnace, ladle refining and vacuum degassing process are used for smelting. The composition and mass percentage of the obtained steel are C 1.50%, Mn≤0.60%, Si ≤0.40%, P≤0.030%, S0.008 %, Cr 12.10%, Mo 0.53%, V 0.21%, and the balance is iron; cast into 6 t octagonal ingot after tapping;

[0033] b. Forging cake blank: Send 6 t octagonal ingots to a 4500MN press at a temperature of ≥300°C for forging to a size of 300-500mm in diameter. After the flaw detection is qualified, then the end face is cold-sawed and blanked into a cake blank;

[0034] c. Forging cake forgings: use the above-mentioned lathe cake blank, reheat it to 1150°C~1190°C, then upsetting and forging with a 4500MN press, and finally anneal and lathe to produce large cake forgings of high-carbon and high-chromium cold...

Embodiment 2

[0039] A method for manufacturing a high-carbon and high-chromium cold-work die steel large-scale cake forging, comprising the following steps:

[0040] a. Smelting: The primary smelting of electric furnace, ladle refining and vacuum degassing process are used for smelting. The composition and mass percentage of the obtained steel are C 1.58%, Mn≤0.40%, Si ≤0.40%, P≤0.030%, S0.005 %, Cr 11.72%, Mo 0.75%, V 0.71%, and the balance is iron; cast into 9 t octagonal ingot after tapping;

[0041] b. Forging cake blank: send 9 t octagonal ingots to a 4500MN press at a temperature of ≥500°C for forging to a size of 400-600mm in diameter. After the flaw detection is qualified, then the end face is cold-sawed and blanked into a cake blank;

[0042] c. Forging cake forgings: use the above-mentioned lathe cake blank, reheat it to 1150°C~1190°C, then upsetting and forging with a 4500MN press, and finally anneal and lathe to produce large cake forgings of high-carbon and high-chromium cold...

Embodiment 3

[0047] A method for manufacturing a high-carbon and high-chromium cold-work die steel large-scale cake forging, comprising the following steps:

[0048] a. Smelting: use electric furnace primary smelting, ladle refining and vacuum degassing process to smelt. The composition and mass percentage of the obtained steel are C 1.45%, Mn≤0.60%, Si ≤0.40%, P≤0.030%, S0.003 %, Cr 12.48%, Mo 0.45%, V 0.26%, and the balance is iron; cast into 9 t octagonal ingot after tapping;

[0049] b. Forging cake blank: send 9 t octagonal ingots to a 4500MN press at a temperature of ≥500°C for forging to a size of 400-600mm in diameter. After the flaw detection is qualified, then the end face is cold-sawed and blanked into a cake blank;

[0050] c. Forging cake forgings: use the above-mentioned lathe cake blank, reheat it to 1150°C~1190°C, then upsetting and forging with a 4500MN press, and finally anneal and lathe to produce large cake forgings of high-carbon and high-chromium cold-working die ste...

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 method for manufacturing large cake forgings of high-carbon and high-chromium cold working die steel. The method is characterized by comprising the following steps of: obtaining Cr12MoV or Cr12Mo1V1 steel by adopting primary smelting with an electric furnace, ladle refining and vacuum degassing process smelting; pouring the tapped steel to form a 6 to 9t octangular ingot; conveying the octangular ingot to a press at the temperature of more than or equal to 300 DEG C, forging the octangular ingot to a blank with the diameter of 300 to 700 millimeters, removing surface defects by annealing, polishing or turning and local grinding, performing cold saw cutting on the end face and blanking to form a cake blank; and heating the cake blank to the temperature of between 1,150 and 1,190 DEG C, upsetting and forging the cake blank by using the press, annealing and turning, and thus obtaining the large cake forgings of the high-carbon and high-chromium cold working die steel. By adopting the method, the yield is improved to 40 to 60 percent; and the manufactured large cake forgings of the high-carbon and high-chromium cold working die steel can comprehensively meet the requirements of hardness, impact toughness and the like and ultrasonic flaw detection quality.

Description

technical field [0001] The invention belongs to a method for manufacturing iron-based alloy steel products, and relates to a method for manufacturing large-scale cake forgings of high-carbon and high-chromium cold-working die steel, in particular to large-scale cake forgings of Cr12MoV and other type tool steels containing 12% Cr (diameter 600~ 1000mm, height 150 ~ 500mm) manufacturing method. The products produced by the invention are mainly suitable for cold working tools such as punches and molds. Background technique [0002] Cr12MoV, Cr12Mo1V1 (D2, SKD11, DIN1.2379), etc. belong to high-carbon and high-alloy ledeburite cold work die steel, with a carbon content as high as 1.40-1.75%, and the volume of Cr7C3 herringbone-like ledeburite eutectic carbide in the steel The percentage can reach about 20%. Due to the high thermal deformation resistance and extremely low plasticity, the English alias is "high chromium pig iron". [0003] The production process of high-carbon ...

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): B21J5/08B21J3/00
Inventor 谢珍勇屈小科黎江吴欣容韩福胡峰荣岳振峰王槐柳余志川杨再春王信才
Owner PANGANG GROUP JIANGYOU CHANGCHENG 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