Hot rolling manufacturing method of ultra-pure ferritic stainless steel
A manufacturing method and technology of stainless steel, applied in the direction of metal rolling, etc., can solve problems such as rough streak defects, affecting ultra-pure steel, etc., and achieve the effect of ensuring the surface quality of strip steel
Active Publication Date: 2016-04-27
SHANXI TAIGANG STAINLESS STEEL CO LTD
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Problems solved by technology
[0004] The technical problem solved by the present invention is aimed at the defects of the prior art. By researching and improving the hot-rolling process, a method for hot-rolling ultra-pure ferritic stainless steel is provided, which solves the key quality problems affecting the development of ultra-pure steel: Rough streaky defects on stainless steel surfaces induced by hot-rolled bonded rolls for stable mass production of ultra-pure ferritic stainless steel
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Embodiment 1
[0068] The dimensions of SPAH and TTS443 continuous casting slabs are: thickness 230mm, width 1280mm, length 9.4m and thickness 200mm, width 1280mm, length 8.6m. SPAH and TTS443 continuous casting slabs were heat treated in heating furnace 0# and 1# respectively, wherein the heating temperature of 0# heating furnace was 1250°C and the heating time was 200 minutes. 1# heating furnace is divided into preheating section, first heating section, second heating section and soaking section, among which the preheating section is heated at 850°C for 75 minutes, the first heating section is heated at 1080°C for 50 minutes, and the second heating section is heated at 1160°C 55 minutes, heat treatment at 1200°C for 55 minutes in the soaking section.
[0069] After heat treatment, the SPAH and TTS443 continuous casting slabs enter the high-pressure water descaling tank and are washed with water at a pressure of 17 MPa for 9.4 seconds and 8.6 seconds, respectively.
[0070] The SPAH and TT...
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Abstract
The invention provides a method for hot-rolling manufacture of ultra-pure ferrite stainless steel. The method for the hot-rolling manufacture of the ultra-pure ferrite stainless steel comprises the steps of heating, rough rolling and finish rolling, wherein the finish rolling step is that the reduction rate of each finish rolling machine frame is determined according to the following formula, a finish rolling machine comprises seven machine frames, the reduction rates of the first finish rolling machine frame, the second finish rolling machine frame, the third finish rolling machine frame and the fourth finish rolling machine frame are reduced, and the reduction rates of the fifth finish rolling machine frame, the sixth finish rolling machine frame and the seventh finish rolling machine frame are improved. By means of the method, the defect of rough stripes on the surface of the stainless steel caused by hot-rolling roller sticking is overcome, and stable batch production of the ultra-pure ferrite stainless steel is achieved.
Description
technical field [0001] The invention relates to the field of metal rolling, in particular to a method for manufacturing ultra-pure ferritic stainless steel by hot rolling. Background technique [0002] Ultra-pure ferritic stainless steel (TTS443, TTS439, TTS445, etc.) has the same atmospheric corrosion resistance as SUS304 stainless steel, and better formability than SUS430 stainless steel, and can replace SUS304 stainless steel under atmospheric conditions. Ultra-pure ferritic stainless steel is nickel-saving and high-efficiency ferritic stainless steel, with low cost and broad market prospects. [0003] Due to the difficulty in hot rolling production of ultra-pure ferritic stainless steel and the high level of technological requirements, the existing technology has always had the defects of hot-rolled sticky rolls and rough surfaces of hot plates, which seriously restrict batch and normal production. Therefore, improving the hot-rolled production technology of ultra-pure ...
Claims
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IPC IPC(8): B21B3/02
Inventor 赵新刚裴建文
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD