A kind of production method of high-carbon high-chromium stainless steel coil

A high-carbon, high-chromium, stainless steel coil technology, applied in temperature control, metal rolling, etc., can solve the problem of low yield of high-carbon, high-chromium stainless steel coils, and achieve the effect of avoiding the phenomenon of splitting and improving the yield

Active Publication Date: 2016-05-11
PANGANG GROUP JIANGYOU CHANGCHENG SPECIAL STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defect of low yield of high-carbon and high-chromium stainless steel coils in the existing method for producing high-carbon and high-chromium stainless steel coils, and provide a production method of high-carbon and high-chromium stainless steel coils with high rolling yield

Method used

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Examples

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Effect test

preparation example Construction

[0011] In the present invention, the method for preparing the blank can be a conventional method in the field, as long as the high-carbon high-chromium stainless steel coil of the present invention is made based on the total mass of the high-carbon high-chromium stainless steel coil, The content of the carbon is 0.9-1% by weight, and the content of the chromium is 17-19% by weight. Generally speaking, the preparation method of the billet includes: preliminary smelting of molten iron to obtain molten steel, and tapping the obtained molten steel into a ladle; and pre-deoxidizing and alloying the molten steel and increasing carbon during the tapping process; After the steel is tapped, the molten steel in the ladle is refined in a ladle furnace. The ladle furnace refining usually includes LF furnace refining and temperature adjustment treatment and vacuum refining to further remove inclusions in the molten steel and fine-tune the alloy, and then inject the refined molten steel The ...

Embodiment 1

[0026] This embodiment is used to illustrate the method for producing high carbon and high chromium stainless steel coils provided by the present invention.

[0027] The 95Cr18 stainless steel die-casting billet with a specification of 200mm*200mm*6000mm (based on the total weight of the billet, C: 0.90-1.0% by weight, Cr: 17.0-19.0% by weight) is carried out in a walking beam heating furnace. Preheating section (620-650℃), heating one section (880-900℃), heating section two (1000-1050℃), and soaking section (1160-1170℃) heating, while controlling the furnace pressure to 2.0Pa, The air-fuel ratio is controlled at 8:1. Before rolling, turn off the high-pressure water descaling device to make the temperature difference between the surface and the center of the rolling piece during the rolling process be 40℃, and then use the rough rolling mill to roll the billet to φ98mm in diameter, after rough rolling and before intermediate rolling A simple natural gas burner is used to heat th...

Embodiment 2

[0030] This embodiment is used to illustrate the method for producing high carbon and high chromium stainless steel coils provided by the present invention.

[0031] The 95Cr18MoV stainless steel die-casting billet with a specification of 200mm*200mm*6000mm (based on the total weight of the billet, C: 0.90-1.0 wt%, Cr: 17.0-19.0 wt%) is carried out in a walking beam heating furnace. Preheating section (650-680℃), heating one section (900-920℃), heating section two (1050-1150℃), and soaking section (1170-1180℃) heating, while controlling the furnace pressure to 4.0Pa, The air-fuel ratio is controlled at 9:1. Before rolling, turn off the high-pressure water descaling device to make the difference between the surface temperature and the center temperature of the rolling piece during the rolling process be 30℃; then use a rough rolling mill to roll the billet to a diameter of φ98mm, after rough rolling and intermediate rolling Previously, a simple natural gas burner was used to heat...

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Abstract

The invention provides a production method of a high-carbon high-chromium stainless steel coil. On the basis of total weight of the high-carbon high-chromium stainless steel coil, the carbon content is at 0.90-1.0%, and the chromium content is at 17.0-19.0%. The production method includes sequentially heating, rolling, coiling, cooling and annealing high-carbon high-chromium stainless steel coil blanks, and rolling includes rough rolling, intermediate rolling, pre-finish rolling and finish rolling. The production method is characterized in that inlet rolled piece temperature of pre-finish rolling is at 1000+ / -10 DEG C, and inlet rolled piece temperature of the finish rolling is at 1100+ / -10 DEG C. By the production method, the high-carbon high-chromium stainless steel coil can be obtained with rolling yield higher than 90%.

Description

Technical field [0001] The invention relates to a method for producing high-carbon and high-chromium stainless steel coils. Background technique [0002] At present, common high-carbon high-chromium stainless steels, such as 95Cr18 series stainless steels, whose metallographic structure is characterized by martensite, are generally used to produce stainless steel or weak acid media and oxidizing acids, organic acids and salts. Corroded balls, bearings, high-quality knives and scissors, surgical knives and high wear-resistant equipment parts, etc. This kind of stainless steel has high hardness, high wear resistance and corrosion resistance, but its own plasticity is poor, and it has certain difficulty in production and processing. In the prior art, in the process of rolling high-carbon and high-chromium stainless steel, the rolling is very difficult, and the phenomenon of head cracking often occurs in the early stage of hot rolling, and the head splitting is easy to occur during ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B3/02B21B37/74
Inventor 孙慎宏郭强荀家平
Owner PANGANG GROUP JIANGYOU CHANGCHENG SPECIAL STEEL
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