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

High-strength toughness cold working die steel and method of producing the same

A technology of cold working die steel with high strength and toughness, which is applied in the field of alloy steel manufacturing process, and can solve problems such as anisotropy of mechanical properties and physical properties, increased tendency of quenching crack formation, poor grinding and grinding properties, etc. , to achieve the effect of improving macro and microstructure, improving hardness and impact resistance, and compacting the structure

Active Publication Date: 2009-07-29
上大鑫仑材料科技(上海)有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (2) Performance of Cr12MoV: high hardness and high wear resistance, low impact toughness
[0008] (3) Deficiencies of Cr12MoV: Ribbon carbides cause obvious anisotropy in the mechanical and physical properties of steel, and reduce impact toughness
The uneven distribution of carbides makes the grinding and abrasiveness of steel worse, and the tendency to form quenching cracks increases

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
  • High-strength toughness cold working die steel and method of producing the same
  • High-strength toughness cold working die steel and method of producing the same
  • High-strength toughness cold working die steel and method of producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: In the present embodiment, the chemical composition and weight percentage of alloy steel are as follows:

[0029] C 0.95%, Cr 9.5%, Mo 2.0%, V 1.0%, Si 1.0%, P<0.02%, S<0.02%, Fe balance.

[0030] The preparation process and steps of alloy steel in the present embodiment are as follows:

[0031] (a) Melting: After the alloy is designed according to the above composition, it is smelted according to the traditional conventional method. The alloy charge according to the above formula is placed in an intermediate frequency induction furnace or an electric arc furnace, and is smelted at a temperature above 1500°C, and then the steel ingot is poured into the next one step to use;

[0032] (b) Electroslag remelting: using electric current to generate resistance heat through the electroslag layer to melt the alloy steel base material of the consumable electrode, the liquid metal falls through the slag pool in the form of molten droplets into the metal molten pool...

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 relates to a high-strength and tenacity cold die steel and a prepare method hereof; the invention belongs to the alloy steel prepare process and technology field. The chemical components with the corresponding weight percents of the invention are: 0.9 percent to 1.0 percent of C, 9 percent to 10 percent of Cr, 2.0 percent of Mo, 0.8 percent to 1.0 percent of V, 1.0 percent of Si, the weight percent of P which is less than 0.02 percent, the weight percent of S which is less than 0.02 percent and the rest is Fe. The prepare process and steps of the cold die steel of the invention are as follows: melting, electro-slag re-melting, annealing, rough forge, re-annealing, spheroidized annealing and quench tempering. The rigidity of the alloy steel prepared according to the method of the invention can reach 61 to 63HRC and the ballistic work AK can reach 61 to 85 J, which increase by more than three times against that of the original Cr12MoV steel.

Description

technical field [0001] The invention relates to a high-strength toughness cold-working die steel and a preparation method thereof, belonging to the technical field of alloy steel manufacturing technology. Background technique [0002] Due to the wide variety of chemical components of cold work die steel, the inhomogeneity of eutectic carbides in high chromium steel increases with the increase of carbon content, resulting in a decrease in the toughness of the steel. [0003] Such as the existing Cr12MoV steel: [0004] (1) The composition of Cr12MoV is shown in the following table: [0005] Chemical composition table of Cr12MoV [0006] [0007] (2) Performance of Cr12MoV: It has high hardness and high wear resistance, and low impact toughness. [0008] (3) Deficiencies of Cr12MoV: Ribbon carbides cause obvious anisotropy in the mechanical and physical properties of the steel, and reduce the impact toughness. The uneven distribution of carbides deteriorates the grindab...

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): C22C38/24C22C33/06C21D1/26C21D8/00C21D1/18
Inventor 吴晓春谢殷子
Owner 上大鑫仑材料科技(上海)有限公司