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A preparation method of ultrapure ferritic stainless steel spectral standard sample

A spectral standard sample, stainless steel technology, applied in the direction of color/spectral characteristic measurement, manufacturing tools, casting molding equipment, etc., can solve the problems of lack of domestic market, large difference in matrix effect, sample inspection and detection deviation, etc., to achieve process quality, The effect of solving errors and good stability

Active Publication Date: 2021-09-28
JIUQUAN IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the research and development of ultra-pure ferritic stainless steel standards seriously lags behind the development of new varieties and new materials in the steel industry, resulting in a lack of international and domestic markets.
Although multiple non-similar stainless steel standard samples can be used to calibrate the direct-reading spectrometer and X-ray fluorescence spectrometer, due to the differences in the smelting process state and the matrix effect of different samples, there are unavoidable detection deviations in the sample inspection, which cannot be Realize precise control of process quality

Method used

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  • A preparation method of ultrapure ferritic stainless steel spectral standard sample
  • A preparation method of ultrapure ferritic stainless steel spectral standard sample
  • A preparation method of ultrapure ferritic stainless steel spectral standard sample

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Embodiment 1

[0050] This embodiment is the preparation method of 436 L series ultra-pure ferritic stainless steel spectral standard sample. The data in Table 1 are 436L series

[0051] List the general requirements for the chemical composition of stainless steel.

[0052] Table 1 436L series stainless steel chemical composition range table (%)

[0053]

[0054] Step 1. Billet mold design

[0055] The inner dimension of the billet mold is designed to be 70mm×200mm×270mm;

[0056] Step 2. Billet mold baking preheating

[0057] After cleaning the billet mold used, bake it at a temperature of 800°C for 2 hours, and then cool it naturally;

[0058] Step 3. Composition Design

[0059] Refer to the national standard GB / T 20878-2007 "Stainless Steel Heat-resistant Steel Grades and Chemical Composition" for composition design, see Table 1.

[0060] Step 4, the choice of charging material

[0061] 436 L ultra-pure ferritic stainless steel trimmings after rolling are used as furnace materia...

Embodiment 2

[0085] This embodiment is a preparation method of 441 series ultra-pure ferritic stainless steel spectral standard samples. The data in Table 5 is for 441 series not

[0086] General requirements for the chemical composition of stainless steel.

[0087] Table 5 441 series stainless steel chemical composition range list (%)

[0088]

[0089] Step 1. Billet mold design

[0090] The inner dimension of the billet mold is designed to be 70mm×200mm×270mm;

[0091] Step 2. Billet mold baking preheating

[0092] After cleaning the billet mold used, bake it at a temperature of 600°C for 3 hours, and then cool it naturally;

[0093] Step 3. Composition Design

[0094] Refer to the national standard GB / T 20878-2007 "Stainless Steel Heat-resistant Steel Grades and Chemical Composition" for composition design, see Table 5.

[0095] Step 4, the choice of charging material

[0096] The 441 ultra-pure ferritic stainless steel trimmings after rolling are used as the furnace material,...

Embodiment 3

[0120] This embodiment is a preparation method of 444 series ultra-pure ferritic stainless steel spectral standard sample. The data in Table 9 is for 444 series not

[0121] General requirements for the chemical composition of stainless steel.

[0122] Table 9 444 series stainless steel chemical composition range table (%)

[0123]

[0124] Step 1. Billet mold design

[0125] The inner dimension of the billet mold is designed to be 70mm×200mm×270mm;

[0126] Step 2. Billet mold baking preheating

[0127] After cleaning the billet mold used, bake it at a temperature of 500°C for 4 hours, and then cool it naturally;

[0128] Step 3. Composition Design

[0129] Refer to the national standard GB / T 20878-2007 "Stainless Steel Heat-resistant Steel Grades and Chemical Composition" for composition design, see Table 9.

[0130] Step 4, the choice of charging material

[0131] The 444 ultra-pure ferritic stainless steel trimmings after rolling are used as the furnace material,...

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Abstract

The invention discloses a method for preparing an ultra-pure ferritic stainless steel spectral standard sample, belonging to the technical field of metallurgical sample detection. The method includes the following steps: billet mold design → billet mold baking preheating → composition design → furnace material selection → vacuum induction furnace smelting → demoulding → physical performance inspection → chemical composition and segregation preliminary inspection → casting blank sample sampling → Qualified inspection of chemical composition of samples → initial inspection of uniformity → segregation inspection → spectral block processing. In strict accordance with the requirements of GB / T15000 "Guidelines for International Standard Sample Work" and YB / T082‑1996 "Technical Specifications for International Standard Samples for Metallurgical Analysis", the invention prepares ultra-pure ferritic stainless steel with good uniformity and stability The spectral standard sample can replace the standard sample of non-similar stainless steel for comparison and calibration of direct reading spectrometer and X-ray fluorescence spectrometer, which solves the problem of detection deviation caused by matrix effect in the inspection of ultra-pure ferritic stainless steel samples, thus To achieve precise control of process quality.

Description

technical field [0001] The invention belongs to the technical field of detection of metallurgical samples, and in particular relates to a method for preparing an ultra-pure ferritic stainless steel spectral standard sample. Background technique [0002] Due to the extremely low carbon and nitrogen content, ultra-pure ferritic stainless steel has superior corrosion resistance and welding performance than ordinary ferritic stainless steel, and has been vigorously developed and widely used in the past half century. In recent years, major domestic steel enterprises have accelerated research and development in the field of ultra-pure ferrite respectively, and their production capacity has been expanded, which has continuously expanded the application of ultra-pure ferritic stainless steel in industries such as automobile exhaust systems, hardware products, home appliances, and solar energy. Ultra-pure ferritic stainless steel 443, 444, etc. have been widely used. The smelting pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/25C22C38/50C22C38/44C22C38/42C22C38/28C22C38/22C22C38/20C22C38/04C22C38/02C22C33/04B22C9/06
CPCB22C9/06C22C33/04C22C38/02C22C38/04C22C38/20C22C38/22C22C38/28C22C38/42C22C38/44C22C38/50G01N21/25
Inventor 唐东王化明陈兴润王林虎王宝君
Owner JIUQUAN IRON & STEEL GRP
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