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Method for producing plastic mold steel slab with high flaw detection requirement by using elliptical continuous casting billet

A technology of plastic mold steel and continuous casting slabs, which is applied in the direction of metal rolling, can solve the problems of many harmful elements, large performance differences, and high production costs, and achieve the effects of less harmful elements, high internal density, and high production efficiency

Inactive Publication Date: 2018-05-18
JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Overcome the problems of the existing die-cast steel ingots and thick plates with large performance differences, many harmful elements, and high production costs

Method used

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  • Method for producing plastic mold steel slab with high flaw detection requirement by using elliptical continuous casting billet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The thickness of the plastic mold steel thick plate suitable for high flaw detection requirements involved in this embodiment is 260mm, and its chemical composition is calculated by mass percentage: C: 0.41%, Si: 0.28%, Mn: 1.60%, P: 0.005%, S : 0.002%, Cr: 2.0%, Mo: 0.28%, and the balance is Fe and unavoidable impurity elements.

[0027] The manufacturing process of the steel plate is as follows:

[0028] Production process: Converter steelmaking → refining → vacuum degassing → ф900*1350mm oval billet continuous casting → slow cooling → heating in soaking furnace → rolling → heat treatment → finishing → inspection → storage.

[0029] The specific operation of the main process is as follows:

[0030] Refining and vacuum degassing treatment reduce the five harmful elements in the steel; continuous casting with low superheat and constant drawing speed, and adopt electromagnetic stirring and light reduction technology to ensure the internal quality of the ф900*1350mm oval...

Embodiment 2

[0036] The thickness of the plastic mold steel thick plate suitable for high flaw detection requirements involved in this embodiment is 220mm, and its chemical composition is calculated by mass percentage: C: 0.42%, Si: 0.26%, Mn: 1.55%, P: 0.006%, S : 0.003%, Cr: 2.5%, Mo: 0.25%, and the balance is Fe and unavoidable impurity elements.

[0037] The manufacturing process of the steel plate is as follows:

[0038] Production process: Converter steelmaking → refining → vacuum degassing → ф900*1350mm oval billet continuous casting → slow cooling → heating in soaking furnace → rolling → heat treatment → finishing → inspection → storage.

[0039] The specific operation of the main process is as follows:

[0040] Refining and vacuum degassing treatment reduce the five harmful elements in the steel; continuous casting with low superheat and constant drawing speed, and the use of electromagnetic stirring and light reduction technology to ensure the internal quality of the ф900*1350mm...

Embodiment 3

[0046] The thickness of the plastic mold steel thick plate suitable for high flaw detection requirements involved in this embodiment is 200mm, and its chemical composition is calculated by mass percentage: C: 0.40%, Si: 0.25%, Mn: 1.60%, P: 0.005%, S : 0.003%, Cr: 2.4%, Mo: 0.23%, and the balance is Fe and unavoidable impurity elements.

[0047] The manufacturing process of the steel plate is as follows:

[0048] Production process: Converter steelmaking → refining → vacuum degassing → ф900*1350mm oval billet continuous casting → slow cooling → heating in soaking furnace → rolling → heat treatment → finishing → inspection → storage.

[0049] The specific operation of the main process is as follows:

[0050] Refining and vacuum degassing treatment reduce the five harmful elements in the steel; continuous casting with low superheat and constant drawing speed, and adopt electromagnetic stirring and light reduction technology to ensure the internal quality of the ф900*1350mm oval...

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Abstract

The invention relates to a method for producing a plastic mold steel slab with a high flaw detection requirement by using an elliptical continuous casting billet. The elliptical billet with the specification of phi 900*1350 mm is continuously cast to form a raw material, the maximum thickness reaches 260 mm, a reasonable heating mode, a rolling process and a heat treatment system are adopted, so that the plastic mold slab with good internal flaw detection quality is obtained, the flaw detection meets the requirement of SEP 1921 / 84D / D level, moreover, the number of harmful elements of the steel slab is small, the level of inclusions is low, the performance is uniform, and the processing performance is good. The plastic mold steel slab with the high flaw detection requirement comprises thecorresponding chemical components of 0.35-0.45% of C, less than or equal to 0.50% of Si, 0.80-1.60% of Mn, 1.50-3.00% of Cr, 0.10-0.50% of Mo, less than or equal to 0.020% of P, less than or equal to0.010% of S, and the balance Fe and inevitable impurities.

Description

technical field [0001] The invention relates to a steel billet post-treatment process, in particular to a plastic mold steel plate production process with high flaw detection requirements by using an elliptical billet. Background technique [0002] Mold is called "the mother of all industries" because in modern industrial production, 60-80% of parts need to be formed by molds, including electronics, automobiles, home appliances, electrical appliances and communications products. With the development and expansion of the mold market year by year, the amount of mold steel, the material used to produce molds, is also increasing significantly, especially plastic mold steel products account for more than 50% of all mold steel. [0003] In recent years, with the increase in size, complexity and precision of plastic products, the matching mold materials have also become larger and more demanding. The large-scale is reflected in the thickness specification of the mold steel plate, ...

Claims

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Application Information

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IPC IPC(8): B21B1/46B21B1/22C21D1/28C21D1/18
CPCB21B1/463B21B1/22B21B2001/225C21D1/18C21D1/28
Inventor 何广霞黄军高助忠李经涛吴扬葛恒贵储炜清
Owner JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD
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