A pouring process of low segregation plastic mold steel

A technology of plastic mold steel and process, which is applied in the field of metallurgy, can solve the problems that the hardness of the whole module exceeds the standard, etc., and achieve the effect of reducing the tendency of carbon segregation, reducing the degree of carbon segregation, and improving the degree of carbon segregation

Active Publication Date: 2021-10-08
石钢京诚装备技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Multi-edge ingots are used, and the carbon segregation extreme difference at both ends of the nozzle riser is 0.20-0.30%. The subsequent heat treatment process needs to be repeated, and often causes the hardness of the entire module to exceed the standard.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In this embodiment, a low-segregation plastic mold steel casting process adopts a rectangular ingot mold production process, and the heat insulation board is imported. The pouring process includes the superheat of molten steel, the pouring time of the steel ingot body, the pouring time of the steel ingot riser, and the weight of the rectangular ingot. Control, the specific process steps are as follows:

[0027] (1) The superheat of molten steel: the superheat of molten steel is 30°C;

[0028] (2) Pouring time of steel ingot body: the pouring time of steel ingot body is 15 minutes;

[0029] (3) Pouring time of steel ingot riser: the pouring time of steel ingot riser is 7min;

[0030] (4) Rectangular ingot weight: The weight of the rectangular ingot is 26t.

[0031] In this embodiment, the minimum value of carbon in the rectangular ingot is 0.39%, the maximum value of carbon is 0.42%, the extreme difference of carbon segregation is 0.03%, and the yield of the forging re...

Embodiment 2

[0033] In this embodiment, a low-segregation plastic mold steel casting process adopts a rectangular ingot mold production process, and the insulation board is made in China. The pouring process includes the superheat of molten steel, the pouring time of the steel ingot ingot body, the pouring time of the steel ingot riser, and the weight of the rectangular ingot Control, the specific process steps are as follows:

[0034] (1) The superheat of molten steel: the superheat of molten steel is 40°C;

[0035] (2) Pouring time of steel ingot body: the pouring time of steel ingot body is 20 min;

[0036] (3) Pouring time of steel ingot riser: the pouring time of steel ingot riser is 7min;

[0037] (4) Weight of rectangular ingot: the weight of rectangular ingot is 25t.

[0038] In this embodiment, the minimum value of carbon in the rectangular ingot is 0.40%, the maximum value of carbon is 0.45%, the extreme difference of carbon segregation is 0.05%, and the yield of the forging re...

Embodiment 3

[0040] In this embodiment, a low-segregation plastic mold steel casting process adopts a rectangular ingot mold production process, and the insulation board is made in China. The pouring process includes the superheat of molten steel, the pouring time of the steel ingot ingot body, the pouring time of the steel ingot riser, and the rectangular ingot mold. Weight control, the specific process steps are as follows:

[0041] (1) The superheat of molten steel: the superheat of molten steel is 45°C;

[0042] (2) Pouring time of steel ingot body: the pouring time of steel ingot body is 24 minutes;

[0043] (3) Pouring time of steel ingot riser: the pouring time of steel ingot riser is 8 minutes;

[0044] (4) Weight of rectangular ingot: the weight of rectangular ingot is 28t.

[0045] In this embodiment, the minimum value of carbon in the rectangular ingot is 0.38%, the maximum value of carbon is 0.44%, the extreme difference of carbon segregation is 0.06%, and the yield of the fo...

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PUM

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Abstract

The invention discloses a pouring process of low segregation plastic mold steel. The production process of a rectangular ingot mold is adopted. The pouring process includes the superheat degree of molten steel, the pouring time of a steel ingot ingot body, the pouring time of a steel ingot riser, and the weight control of a rectangular ingot mold; The pouring time of the steel ingot body is controlled at 14-24 minutes; the pouring time of the steel ingot riser is controlled at ≥ 6 minutes; the weight of the rectangular ingot is controlled at 20-28t. The present invention adopts the production process of rectangular ingot mould, and by reasonably controlling the superheat of molten steel, the pouring time of steel ingot ingot body, the pouring time of steel ingot riser, and the weight of rectangular ingot mold, the carbon segregation degree is obviously improved, and the carbon segregation extreme value of the produced rectangular ingot is controlled within 0.03‑0.07%, the yield of forgings reaches more than 75%.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a pouring process of low-segregation plastic mold steel. Background technique [0002] As the application range of plastic products becomes wider and wider, the requirements of the plastic mold industry for mold steel are increasing day by day. The development of large-scale, precision and multi-cavity has put forward higher requirements for the quality of mold steel. [0003] Uniformity of hardness is a decisive indicator of module quality. The degree of segregation of carbon is crucial to the uniformity of hardness. For a long time, multi-edge ingots have been used to produce modules, and carbon segregation has always been heavy. With the continuous improvement of the hardness uniformity requirements of modules, it is difficult to meet the requirements, which has plagued the development of high-end die steel. [0004] When multi-edge ingots are used for product...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D7/06B22D46/00
CPCB22D7/06B22D46/00
Inventor 张玉亭刘宪民许长军
Owner 石钢京诚装备技术有限公司
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