Nickel-saving RE-containing austenitic stainless steel and its prepn
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
An austenitic and stainless steel technology, applied in the field of austenitic stainless steel and its preparation, can solve the problems of unscientific and reasonable composition design, poor corrosion resistance and high strength, saving precious nickel resources, reducing production costs, comprehensive good performance
Inactive Publication Date: 2006-05-17
CENT IRON & STEEL RES INST
View PDF0 Cites 34 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
In order to save nickel, the relevant domestic departments have researched and developed 200 or 201 chromium manganese nitrogen austenitic stainless steel ([Stainless Development] 2004, the first issue, pages 4-22; [World Metal Bulletin] 2004.9.7, total No. 1702 Period), currently in circulation in the market, but there are many problems with this type
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Example Embodiment
[0049] According to the chemical composition of the nickel-saving austenitic rare-earth stainless steel of the present invention, three furnaces of the steel of the present invention were smelted in a non-vacuum induction furnace. The chemical composition (wt%) of the three furnaces is shown in Table 1. After smelting, it is cast into ingots, and then ingot blooming, steel rolling and solution treatment are carried out according to the process steps of its preparation method. The relevant parameters of smelting, casting, ingot blooming, steel rolling and solution treatment are shown in Table 2. Subsequently, the product steel samples were sampled, and the mechanical performance test and the corrosion performance test were carried out. The results obtained are listed in Table 3 and Tables 4 and 5 respectively.
[0050] For comparison, under the same equipment conditions, a furnace was also smelted and processed with other components the same as or similar to the present invention, ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The present invention belongs to the field of alloy steel, and is nickel-saving RE-containing austenitic stainless steel comprising C not more than 0.08 wt%, Si 0.3-0.8 wt%, Mn 5.0-8.5 wt%, S not more than 0.05 wt%, P not more than 0.04 wt%, Ni 3.0-5.5 wt%, Cr 14-19 wt%, Cu 1.0-4.0 wt%, N not more than 0.20 wt%, total O not more than 0.005 wt%, RE 0.05-0.3 wt% and Fe the rest. The preparation process of the stainless steel includes the technological steps of: smelting, casting at 1500-1650 deg.c, cogging at initial temperature of 1080-1240 deg.c and final forging temperature over 900 deg.c, rolling at initial temperature of 1100-1240 deg.c and final temperature over 900 deg.c, and solution treatment at 1050-1150 deg.c for 20-30 min. During the smelting, the molten steel has oxygen content not more than 50 ppm before RE is added, and RE is added in 30 sec before casting.
Description
technical field [0001] The invention belongs to the field of alloy steel, and mainly relates to austenitic stainless steel and a preparation method thereof. Background technique [0002] In austenitic stainless steel, the more typical steel grade is SUS304 austenitic stainless steel, which has been widely used in the production of kitchen utensils, utensils, washing machine drums, automobile components and train carriages, etc. ([Stainless Steel Anthology] 1985, the first Issue, pp. 1-9; [Stainless Development] 2001, Issue 1, pp. 7-22; [Stainless] 2002, Issue 3, pp. 1-12). The prominent features of this steel are moderate strength, good plasticity and toughness, and good corrosion resistance. However, due to the high nickel content of more than 8%, the cost is relatively high and the price is expensive. In China, and even in the world, there are few mineable mineral reserves for nickel, so nickel is a scarce strategic material, and its application, especially in the future,...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more