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Steel for stamping die and method of manufacture

A manufacturing method and stamping die technology, applied in the direction of manufacturing tools, temperature control, heat treatment process control, etc., can solve the problem of increasing the energy consumption of billet opening and product manufacturing costs, yield strength, plastic elongation, section shrinkage, and carbide non-uniformity Low main performance index, high production cost and other problems, to achieve the effect of saving energy consumption, reducing billet cost and improving economic benefits

Active Publication Date: 2008-11-26
宝武特种冶金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 2) The forging blanking process is adopted, resulting in higher production costs;
[0007] 3) Forging billet opening needs 5 fires, which increases the energy consumption and product manufacturing cost required for billet opening;
[0008] 4) The main performance indicators such as yield strength, plastic elongation, section shrinkage, and carbide unevenness are low

Method used

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  • Steel for stamping die and method of manufacture
  • Steel for stamping die and method of manufacture
  • Steel for stamping die and method of manufacture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1. The weight percentage of the chemical composition of steel is: C 0.38wt%, Mn 0.45wt%, Cr 5.20wt%, Si 0.48wt%, Mo 3.71wt%, V 0.60wt%, Cu 0.21wt%, Ni 0.18wt%, P 0.011wt%, S 0.008wt%, the rest is Fe and unavoidable impurities;

[0041] 2. Process the steel with the above chemical composition ratio as follows:

[0042] (1) After refining in the electric furnace and outside the furnace, it is poured into a steel ingot of 2350Kg;

[0043] (2) The steel ingot is heated in the heating furnace of the blooming mill. The temperature of the steel ingot is 780℃. The steel ingot is heated to 1230℃ at a rate of 100℃ / h in the heating furnace of the blooming mill. During the heat preservation process, a steel turning treatment is performed 1.9 hours after the start of the heat preservation, and the heating process curve is shown in figure 1 Shown

[0044] (3) The steel ingot is bloomed and bloomed by the blooming mill, the start-rolling temperature is 1140℃, and the final rolling temper...

Embodiment 2

[0048] 1. The weight percentage of the chemical composition of steel is: C 0.35wt%, Mn 0.44wt%, Cr 4.70wt%, Si 0.50wt%, Mo 3.00wt%, V 0.55wt%, Cu 0.22wt%, Ni 0.30wt%, P 0.009wt%, S 0.007wt%, the rest is Fe and unavoidable impurities;

[0049] 2. Process the steel with the above chemical composition ratio as follows:

[0050] (1) After refining in the electric furnace and outside the furnace, it is poured into a steel ingot of 2350Kg;

[0051] (2) The steel ingot is heated in the heating furnace of the blooming mill. The temperature of the steel ingot is 700℃. The steel ingot is heated to 1250℃ at a rate of 100℃ / h in the heating furnace of the blooming mill. During the heat preservation process, a steel turning treatment will be carried out 1.7 hours after the start of heat preservation

[0052] (3) The steel ingot is bloomed and billeted by the blooming mill, the start-rolling temperature is 1150℃, and the final rolling temperature is 1020℃;

[0053] (4) After the blooming billet ...

Embodiment 3

[0056] 1. The chemical composition weight percentage of steel is: C 0.40wt%, Mn 0.60wt%, Cr 5.23wt%, Si 0.30wt%, Mo 4.00wt%, V 0.40wt%, Cu 0.30wt%, Ni 0.21wt%, P 0.011wt%, S 0.015wt%, the rest is Fe and unavoidable impurities;

[0057] 2. Process the steel with the above chemical composition ratio as follows:

[0058] (1) After refining in the electric furnace and outside the furnace, it is poured into a steel ingot of 2350Kg;

[0059] (2) The steel ingot is heated in the heating furnace of the blooming mill. The temperature of the steel ingot is 800℃. The steel ingot is heated to 1210℃ at a rate of 80℃ / h in the heating furnace of the blooming mill. During the heat preservation process, turn over the steel 1.5 hours after the start of heat preservation

[0060] (3) The steel ingot is bloomed and bloomed by the blooming mill, the start-rolling temperature is 1120℃, and the final rolling temperature is 1070℃;

[0061] (4) After the blooming billet is forged into a finished product. ...

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Abstract

The invention discloses steel used for punching die and a manufacturing method thereof. The weight percentages of the chemical composition of the steel are as follows: C, 0.35 to 0.40 wt percent; Mn, 0.30 to 0.60 wt percent; Cr, 4.70 to 5.50 wt percent; Si, 0.30 to 0.50 wt percent; Mo, 3.00 to 4.00 wt percent; V, 0.40 to 0.70 wt percent; Cu, less than or equal to 0.30 wt percent; Ni, less than or equal to 0.30 wt percent; P, less than or equal to 0.020 wt percent; S, less than or equal to 0.015 wt percent; the rest, Fe and inevitable impurity elements. The manufacturing method mainly comprises the following steps: 1) casting of ingots; 2) heating the ingots in a blooming mill furnace and carrying out heat preservation for three to five hours; 3) rolling and forging into products. The steel used for punching die produced by the invention has the advantages of improving performance indexes significantly, lowering production cost and improving the economic benefit of the products.

Description

Technical field [0001] The invention relates to a stamping die steel and a metallurgical manufacturing method thereof, in particular to a stamping die steel used for manufacturing cold stamping forming dies in the machinery industry and a metallurgical manufacturing method thereof. Background technique [0002] Die steel can generally be divided into three categories: hot work die steel, cold work die steel and plastic die steel. The stamping die steel used in the manufacturing of cold forming stamping dies used in the machinery industry is one of the more commonly used cold work die steels. Widely used in the manufacture of stamping and forming molds; hot work die steel is mainly used for the manufacture of hot forming molds, generally used for the manufacture of aluminum alloy die-casting molds under high temperature conditions; plastic mold steel is mainly used for the manufacture of plastic forming molds. The steel used for stamping dies in my country currently adopts the nat...

Claims

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Application Information

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IPC IPC(8): C22C38/24C22C38/46C22C33/04C21D8/00C21D11/00B21B37/74
Inventor 续维吴振毅
Owner 宝武特种冶金有限公司
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