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Special austenitic stainless steel for beer barrel and production method of austenitic stainless steel

A technology of austenitic stainless steel and production method, which is applied in the field of stainless steel metallurgy, can solve the problems of delayed cracking stress, martensitic transformation, and intensified deformation and hardening of beer barrels, so as to reduce the amount of martensitic transformation and improve yield. Good strength and roughness

Inactive Publication Date: 2019-10-18
GUANGDONG GUANGQING METAL TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, when ordinary stainless steel is used to produce beer barrels, since the structure of 304 stainless steel after solution treatment is supersaturated metastable austenite, deformation-induced martensitic transformation is prone to occur when a large degree of plastic deformation occurs
For the processing of beer kegs, the appearance of deformation-induced martensite can easily lead to the aggravation of the deformation hardening of beer kegs, resulting in a decrease in the plastic deformation capacity of beer kegs and cracks during the preparation process, and it is also prone to delays in the later service of beer kegs Cracking and stress corrosion conditions
[0004] Chinese patent ZL201610178541.2 discloses austenitic stainless steel suitable for the production of beer barrels and its manufacturing method. It mainly focuses on pickling and cold annealing to eliminate the color difference on the surface of the steel strip. How to reduce the transformation of deformed martensite is no mention

Method used

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  • Special austenitic stainless steel for beer barrel and production method of austenitic stainless steel
  • Special austenitic stainless steel for beer barrel and production method of austenitic stainless steel
  • Special austenitic stainless steel for beer barrel and production method of austenitic stainless steel

Examples

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Embodiment 1

[0033] This embodiment provides a kind of austenitic stainless steel for beer kegs, the mass percentage content of chemical elements of the austenitic stainless steel is: carbon C: 0.049%; silicon Si: 0.40%; manganese Mn: 1.06%; phosphorus P: 0.033%; Sulfur S: 0.0048%; Chromium Cr: 18.39%; Nickel Ni: 8.05%; Copper Cu: 0.33%; Nitrogen N: 0.066%; Avoid impurity elements.

[0034] The above raw materials are sequentially subjected to AOD steelmaking, LF refining, and continuous casting to obtain steel slabs as high-quality raw material slabs, and then the obtained high-quality raw material slabs are sequentially subjected to hot rolling, hot rolling annealing and pickling, cold rolling, cold rolling annealing and pickling, so that Get austenitic stainless steel for beer kegs.

[0035] Among them, in the reduction stage of AOD steelmaking, low-aluminum ferrosilicon is used to reduce the amount of aluminum-containing elements; LF refining soft blowing 18min, calming 20min; pure ca...

Embodiment 2

[0048] This embodiment provides a kind of austenitic stainless steel for beer kegs, the mass percent content of chemical elements of the austenitic stainless steel is: carbon C: 0.057%; silicon Si: 0.47%; manganese Mn: 1.15%; phosphorus P: 0.032%; Sulfur S: 0.0018%; Chromium Cr: 18.28%; Nickel Ni: 8.05%; Copper Cu: 0.32%; Nitrogen N: 0.064%; Avoid impurity elements.

[0049] The preparation process of the austenitic stainless steel is basically the same as that of Example 1, except that the steelmaking process is LF refining, soft blowing for 20 minutes, and calming for 25 minutes; the continuous casting process has a large bale of 6.0 tons of excess steel, and the smallest bale tonnage accounts for 90.2%.

[0050] The Md30 value of the austenitic stainless steel is -11.7°C, and the number density of inclusions per unit area of ​​the raw blank is 4.00 pieces / cm 2 ;

[0051] The cold rolling annealing temperature is controlled at 1045°C, and the cold rolling reduction ratio i...

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Abstract

The invention discloses special austenitic stainless steel for a beer barrel and a production method of the austenitic stainless steel. The austenitic stainless steel for the beer barrel comprises thefollowing chemical elements of, in mass percentage, 0.048%-0.060% of C, 0.4%-0.6% of Si, 1.0%-1.3% of Mn, less than or equal to 0.045% of P, less than or equal to 0.006% of S, 18.0-18.5% of Cr, 8.0%-8.2% of Ni; 0.3-0.4% of Cu, 0.06-0.07%of N, less than or equal to 0.5% of Mo, B more than or equal to 15*10<-4> and less than or equal to 35*10<-4>, and balance Fe and inevitable impurity elements. According to the austenitic stainless steel for the beer barrel, a high-quality raw material blank is obtained by increasing the cleanliness of molten steel in the steelmaking stage, and a steel coil with excellent surface quality is obtained in combination with hot rolling; meanwhile, the temperature of a cold annealing material is reduced in the cold rolling annealing process, and crystal grains are refined to improve the yield strength; and in addition, through the proper component control, Md30 can be ensured to be minus 9-minus 13 DEG C, so that deformation-induced martensite phase-change transformation amount in the shaping processing process can be effectively reduced.

Description

technical field [0001] The invention relates to an austenitic stainless steel and a production method thereof, in particular to a production method of the austenitic stainless steel for beer kegs, belonging to the technical field of stainless steel metallurgy. Background technique [0002] Stainless steel beer kegs are beautiful and elegant, with reasonable overall structure, sturdy and durable, hygienic and safe. It is a popular keg type for beer storage and transportation in the world. Because its shell and inner tank are all made of stainless steel, and the insulation layer is injection-molded with polymer materials, the insulation effect is excellent, and it is especially suitable for keeping draft beer fresh. The shell of the stainless steel beer keg is usually stretched and welded with SUS3042B high-quality stainless steel plate. The handle and bottom ring are welded firmly to the barrel body by TIG welding. At present, beer manufacturers can choose high-quality and l...

Claims

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Application Information

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IPC IPC(8): C22C38/44C22C38/54C22C38/42C22C38/02C22C38/04C21D8/02
CPCC21D8/0205C21D8/0226C21D8/0236C21D8/0247C21D2211/001C22C38/001C22C38/02C22C38/04C22C38/42C22C38/44C22C38/54
Inventor 田伟光陆海飞徐佳林刘光勇尹帮伍江潇韩波
Owner GUANGDONG GUANGQING METAL TECH