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9Cr13MoVCo stainless steel strip steel and preparation method thereof

A technology of stainless steel strip and molten steel is applied in the field of stainless steel materials to achieve the effect of improving quenching hardness, excellent wear resistance and high hardness

Active Publication Date: 2014-05-28
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

[0003] At present, in the fields of high-end hairdressing scissors, military and police daggers, and high-end collection knives, martensitic stainless steel has higher quenching hardness requirements. However, there is no similar material in China to meet these needs, and we can only rely on AUS10 imported from Japan's Aichi Steel

Method used

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  • 9Cr13MoVCo stainless steel strip steel and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take the preparation of 9Cr13MoVCo stainless steel hot-rolled strip steel with a width of 250mm and a thickness of 18mm as an example:

[0028] A) Smelting, adding high-carbon martensitic stainless steel, carbon steel waste 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: 0.88% carbon, 0.56% silicon, 37% manganese, 0.015% phosphorus, 0.007% sulfur, 13.22% Chromium, 0.20% molybdenum and 0.15% vanadium, 0.30% cobalt, and the remainder 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 qualified components, slag white, The primary molten steel with good fluidity should be controlled at 1617°C; after that, the primary ...

Embodiment 2

[0036] Take the preparation of 9Cr13MoVCo stainless steel strip with a width of 250mm and a thickness of 4.0mm as an example:

[0037] A) Smelting, putting mold steel scrap, carbon steel scrap and ferroalloy into the intermediate frequency furnace for primary smelting to obtain primary molten steel, sampling and analyzing the primary molten steel and adjusting the mass % content of chemical elements in the primary molten steel to: 0.90% carbon, 0.46% silicon, 40% manganese, 0.013% phosphorus, 0.005% sulfur, 13.45% chromium, 0.25% molybdenum and 0.10% vanadium, 0.25% cobalt, and the rest is iron. After the above-mentioned sampling analysis and adjustment of the mass % content of chemical elements, slag removal and reduction are carried out to obtain a primary molten steel with qualified components, slag white, and good fluidity. The temperature of the primary molten steel is controlled at 1615°C; after that Put the initial molten steel into the LF furnace ladle for LF furnace r...

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Abstract

The invention relates to 9Cr13MoVCo stainless steel strip steel and a preparation method thereof. The steel comprises the chemical elements by the mass percentage: 0.88-0.95% of carbon, not more than 0.60% of silicon, not more than 0.60% of manganese, not more than 0.030% of phosphorus, not more than 0.030% of sulfur, 13.00-13.50% of chromium, 0.20-0.25% of molybdenum, 0.10-0.15% of vanadium, 0.20-0.30% of cobalt, and the balance iron. The gas contents in the steel comprise [N]=200-400 ppm, [H]<=2.5 ppm, and [O]=20-40 ppm. The steel has the advantages of high hardness, excellent wear resistance, good corrosion resistance and ideal toughness, has a biggest characteristic of scientific addition of an appropriate amount of cobalt, and can effectively improve the material quenching hardness for meeting special needs.

Description

technical field [0001] The invention relates to the technical field of stainless steel materials, in particular to a 9Cr13MoVCo high-carbon, high-quenching-hardness special martensitic stainless steel, and also relates to a method for manufacturing the high-carbon, high-quenching-hardness special martensitic stainless steel. Background technique [0002] With the continuous improvement of science and technology and people's living standards, the current market demand for martensitic stainless steel tends to be diversified, and more surface hardness, strength, corrosion resistance and wear resistance of martensitic stainless steel are higher The requirements are constantly emerging, and the traditional martensitic stainless steel materials can no longer fully meet the performance requirements of customers for high hardness and high strength martensitic stainless steel. In order to meet this new market demand, our factory has independently developed a new high-carbon and high-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/30C22C33/04C21D8/02
Inventor 金振华
Owner 常熟市长江不锈钢材料有限公司
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