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
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[0025] Example 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%, the balance is Fe and inevitable impurity elements.
[0027] The manufacturing process of the steel plate is as follows:
[0028] Production process flow: converter steelmaking → refining → vacuum degassing → ф900*1350mm oval billet continuous casting → slow cooling → soaking furnace heating → rolling → heat treatment → finishing → inspection → storage.
[0029] The specific operations of the main process are as follows:
[0030] Refining and vacuum degassing treatment reduce the five harmful elements in steel; low superheat constant drawing speed continuous casting, and electromagnetic stirring and light reduction technology are used to ensure the internal quality of ф900*1350mm oval bille...
Example Embodiment
[0035] Example 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%, the balance is Fe and inevitable impurity elements.
[0037] The manufacturing process of the steel plate is as follows:
[0038] Production process flow: converter steelmaking → refining → vacuum degassing → ф900*1350mm oval billet continuous casting → slow cooling → soaking furnace heating → rolling → heat treatment → finishing → inspection → storage.
[0039] The specific operations of the main process are as follows:
[0040] Refining and vacuum degassing treatment reduce the five harmful elements in steel; low superheat constant drawing speed continuous casting, and electromagnetic stirring and light reduction technology are used to ensure the internal quality of ф900*1350mm oval bille...
Example Embodiment
[0045] Example 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%, the balance is Fe and inevitable impurity elements.
[0047] The manufacturing process of the steel plate is as follows:
[0048] Production process flow: converter steelmaking → refining → vacuum degassing → ф900*1350mm oval billet continuous casting → slow cooling → soaking furnace heating → rolling → heat treatment → finishing → inspection → storage.
[0049] The specific operations of the main process are as follows:
[0050] Refining and vacuum degassing treatment reduce the five harmful elements in steel; low superheat constant drawing speed continuous casting, and electromagnetic stirring and light reduction technology are used to ensure the internal quality of ф900*1350mm oval bille...
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