Vanadium-containing plastic mold steel plate and manufacturing method thereof

A technology for a plastic mold and a manufacturing method, applied in the field of vanadium-containing non-quenched and tempered plastic mold steel plate and its manufacturing, can solve the problems of complex process, high alloy cost, affecting the internal quality and machinability of the mold steel, and achieve the production process flow. The effect of simplicity, low alloy cost, and wide tempering process window

Active Publication Date: 2019-01-04
SGIS SONGSHAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen from its composition that the steel contains relatively high Mn, Cr, and V elements, and at the same time, precious elements such as Cu and Ni are added, and the alloy cost is relatively high; in the smelting process, Al is used for deoxidation, and it is easy to form B-type inclusions, which affect The internal quality and machinability of die steel; the rolling process adopts controlled rolling and controlled cooling process, and the process is complex

Method used

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  • Vanadium-containing plastic mold steel plate and manufacturing method thereof
  • Vanadium-containing plastic mold steel plate and manufacturing method thereof
  • Vanadium-containing plastic mold steel plate and manufacturing method thereof

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Experimental program
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Effect test

Embodiment 1

[0026] The chemical composition of the steel is C: 0.38%, Si: 0.41%, Mn: 1.45%, P: 0.013%, S: 0.005%, Cr: 0.80-1.20%, V: 0.05-0.15%, Ti: ≤ 0.03%, B: 0.0017%, the balance is Fe and inevitable inclusions, of which Mn+Cr+V is 2.4~2.7%, Cr / V is 9-11, Ti / B≥8.

[0027] (1) Smelting: Smelting according to the above chemical composition. 120-ton converter smelting, LF refining in ladle furnace, RH refining in vacuum degassing furnace, calcium treatment after ladle out of RH furnace, soft blowing of Ar gas from the bottom of the ladle to molten steel, blowing Ar gas time ≥ 10 minutes;

[0028] (2) Pouring: Ladle to tundish adopts long nozzle to protect steel tapping, tundish to crystallizer adopts submerged nozzle to protect pouring, superheat of molten steel in tundish is controlled at ≤30°C; total light reduction in continuous casting process ≥5mm , the secondary cooling electromagnetic stirring is put into the whole process, and the continuous casting slab with a thickness of 270mm...

Embodiment 2

[0032] The chemical composition of the steel is C: 0.38%, Si: 0.40%, Mn: 1.55%, P: 0.013%, S: 0.005%, Cr: 0.80-1.20%, V: 0.05-0.15%, Ti: ≤ 0.03%, B: 0.0017%, the balance is Fe and inevitable inclusions, of which Mn+Cr+V is 2.4~2.7%, Cr / V is 9~11, Ti / B≥8.

[0033] (1) Smelting: Smelting according to the above chemical composition. 120-ton converter smelting, LF refining in ladle furnace, RH refining in vacuum degassing furnace, calcium treatment after ladle out of RH furnace, soft blowing of Ar gas from the bottom of the ladle to molten steel, blowing Ar gas time ≥ 10 minutes;

[0034] (2) Pouring: Ladle to tundish adopts long nozzle to protect steel tapping, tundish to crystallizer adopts submerged nozzle to protect pouring, superheat of molten steel in tundish is controlled at ≤30°C; total light reduction in continuous casting process ≥5mm , the secondary cooling electromagnetic stirring is put into the whole process, and the continuous casting slab with a thickness of 270mm i...

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Abstract

The invention relates to a manufacturing method of a vanadium-containing plastic mold steel plate. The vanadium-containing non-tempering plastic mold steel plate comprises, by weight, 0.28-0.40% of C,0.20-0.50% of Si, 1.20-1.60% of Mn, 0.030% or below of P, 0.025% or below of S, 0.80-1.20% of Cr, 0.05-0.15% of V, 0.030% or below of Ti, 0.00255 or below of B and the balance Fe and unavoidable impurities, wherein the content of Mn, Cr and V is 2.4-2.7%, the ratio of Cr to V is 9-11, and the ratio of Ti to B is equal to or higher than 8. The manufacturing method has the advantages that the alloycost is low, the tempering process window is wide, the internal quality is high, and the production process is short, and the manufacturing method can be widely used in the plastic mold manufacturingindustry.

Description

technical field [0001] The invention relates to a plastic mold steel plate and a manufacturing method thereof, in particular to a vanadium-containing non-tempered plastic mold steel plate and a manufacturing method thereof. Background technique [0002] As the world's mold manufacturing center shifts from developed countries to developing countries represented by China, my country's plastic mold manufacturing industry has grown rapidly. At the same time, the rapid development of industrial large-scale equipment and automation will inevitably promote the development of plastic mold steel in the direction of high purity, high isotropy, high uniformity, and easy cutting. Secondly, the iron and steel industry is facing severe market competition pressure, and they are all exploring new techniques for producing high-quality alloy die steel at low cost. [0003] The composition system of die steel plates in my country is mainly Cr-Mo and Cr-Mo-Ni. Die steel manufacturers have done...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/24C22C38/28C22C38/32C22C38/38C21D8/02
CPCC21D8/0226C21D8/0247C22C38/02C22C38/04C22C38/24C22C38/28C22C38/32C22C38/38
Inventor 李成良黄远坚温志红
Owner SGIS SONGSHAN CO LTD
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