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A kind of 3cr17nimov stainless steel strip steel and its preparation method

A technology of stainless steel strip and molten steel, applied in the field of stainless steel materials, can solve the problems of DIN1.2316, such as heavy dependence on foreign imports, high cost, and inability to ensure timely delivery, and achieve excellent wear resistance, quality assurance, and high hardness.

Active Publication Date: 2016-01-06
常熟市长江不锈钢材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these two options can barely meet the normal demand for plastic mold steel at this stage, the disadvantages are also very obvious: choosing DIN1. Key performance requirements such as purity, wear resistance and corrosion resistance cannot meet the needs of high quality

Method used

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  • A kind of 3cr17nimov stainless steel strip steel and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take the preparation of 3Cr17NiMoV stainless steel strip with a width of 270mm and a thickness of 18mm as an example.

[0027] A) Smelting, adding mold steel waste, carbon steel or bonded steel waste with the same steel type or similar chemical composition, and accurately calculated related ferroalloys to the intermediate frequency furnace for preliminary smelting according to different periods to obtain primary molten steel , Sampling and analyzing the initial molten steel and adjusting the mass % content of chemical elements in the initial molten steel: 0.32% carbon, 0.46% silicon, 34% manganese, 0.013% phosphorus, 0.006% sulfur, 16.32% chromium, 0.68% nickel, 0.95% molybdenum and 0.72% vanadium, and the rest is iron. After the above-mentioned samples are analyzed and the mass % content of the chemical elements is adjusted, the slag is removed and reduced to obtain a qualified composition, slag white , Primary molten steel with good fluidity, the temperature of the pr...

Embodiment 2

[0035] Take the preparation of 3Cr17NiMoV stainless steel strip with a width of 249mm and a thickness of 28mm as an example.

[0036] A) smelting, throwing mold steel scrap, carbon steel scrap and ferroalloy into the intermediate frequency furnace for primary refining to obtain primary molten steel, sampling and analyzing the primary molten steel and adjusting the mass % content of the chemical elements of the primary molten steel to be: 0.34% carbon, 0.40% silicon, 32% manganese, 0.009% phosphorus, 0.004% sulfur, 16.25% chromium, 0.73% nickel, 0.92% molybdenum and 0.74% vanadium, the rest is iron, the After sampling and analyzing and adjusting the mass % content of chemical elements, the slag is removed and reduced to obtain the primary molten steel with qualified composition, white slag and good fluidity. The temperature of the primary molten steel is controlled at 1615°C. Afterwards, the primary molten steel is mixed into the LF furnace ladle for LF furnace refining. In the...

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Abstract

The invention discloses a 3Cr17NiMoV stainless steel strip and a preparation method, which relate to the technical field of stainless steel materials. The 3Cr17NiMoV stainless steel strip comprises the following chemical elements in percentage by mass: 0.30-0.40 percent of carbon, less than or equal to 0.60 percent of silicon, less than or equal to 0.60 percent of manganese, less than or equal to 0.025 percent of phosphor, less than or equal to 0.015 percent of sulfur, 16.00-17.50 percent of chromium, 0.6-1.0 percent of nickel, 0.80-1.30 percent of molybdenum, 0.72-0.76 percent of vanadium and the balance of iron, wherein the contents of gases in the steel are as follows: the content of [N] is equal to 200-400 ppm, the content of [H] is less than or equal to 2.5 ppm and the content of [O] is equal to 20-40 ppm. According to the technical scheme, since the chemical elements and the mass percentage contents thereof are rationally selected and the contents of the harmful gases such as the hydrogen, oxygen and nitrogen are properly controlled, the 3Cr17NiMoV stainless steel strip has high hardness, superior wear resistance, good corrosion resistance and ideal toughness. The preparation method has the advantages of high yield so as to save energy, short process flow, capability of saving energy and capability of guaranteeing the quality by controlling the contents of the harmful gases of the hydrogen, oxygen and nitrogen and effectively removing the harmful elements and inclusions.

Description

technical field [0001] The invention relates to the technical field of stainless steel materials, in particular to a 3Cr17NiMoV high-polished mirror-surface plastic mold steel, and also relates to a manufacturing method of the highly-polished mirror-surface plastic mold steel. Background technique [0002] With the continuous improvement of science and technology and people's living standards, the current mold steel industry has higher and higher requirements for the surface hardness, purity and smoothness, corrosion resistance and wear resistance of mold steel materials. Traditional mold steel materials have It cannot fully meet the performance requirements of customers for mold steel materials, and the above-mentioned performance factors of these mold steels will greatly affect the quality of mold products and various technical indicators. In order to meet this new market demand, our factory has independently developed a new high-polish mirror plastic mold steel, namely 3C...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/46
Inventor 金振华孙传国谭明
Owner 常熟市长江不锈钢材料有限公司