Preparation method of ultrapure ferritic stainless steel spectral standard sample

A spectral standard sample, stainless steel technology, applied in color/spectral characteristic measurement, manufacturing tools, casting and molding equipment, etc., can solve the problems of large difference in matrix effect, sample inspection and detection deviation, precise control, etc.

Active Publication Date: 2019-04-09
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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  • Preparation method of ultrapure ferritic stainless steel spectral standard sample
  • Preparation method of ultrapure ferritic stainless steel spectral standard sample
  • Preparation method of ultrapure ferritic stainless steel spectral standard sample

Examples

Experimental program
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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 table (%)

[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 samples. 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 preparation method of an ultrapure ferritic stainless steel spectral standard sample, and belongs to the technical field of detection of metallurgical samples. The method comprises the following steps: design of a billet mold, baking and preheating of the billet mold, component design, selection of furnace material, smelting of a vacuum induction furnace, de-molding, testof physical properties, preliminary test of chemical composition and segregation, casting billet sampling, acceptance test of chemical compositions of the sample, preliminary test of uniformity, andprocessing of spectral blocks. The preparation method prepares the ultrapure ferritic stainless steel spectral standard sample with good uniformity and stability by strictly following the requirementsof GB/T15000 "International Standard Sample Working Guidelines" and YB/T082-1996 "Technical Specifications for International Standard Samples for Metallurgical Analysis", which can replace the standard sample of non-similar stainless steel for comparison and calibration of the direct reading spectrometer and the X-ray fluorescence spectrometer, and solves the problem of detection deviation causedby the matrix effect in the inspection of the ultrapure ferritic stainless steel sample, thereby achieving 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 Applications(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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