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Thin belt continuous casting austenitic stainless steel belt and manufacturing method thereof

A technology of austenitic stainless steel and manufacturing method, applied in the direction of manufacturing tools, metal rolling, metal rolling, etc., can solve the problems of cost increase, pitting corrosion resistance decrease, crack tendency intensification, etc., to achieve easy control and reduce investment Cost and operating costs, the effect of simple and stable production process

Active Publication Date: 2008-03-26
BAOSHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ferrite in austenitic stainless steels will increase the tendency to crack during hot working and also lead to a decrease in pitting resistance
The commonly used method to reduce the amount of ferrite is to increase the Ni / Cr equivalent ratio, which will increase the amount of Ni and greatly increase the cost

Method used

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  • Thin belt continuous casting austenitic stainless steel belt and manufacturing method thereof
  • Thin belt continuous casting austenitic stainless steel belt and manufacturing method thereof
  • Thin belt continuous casting austenitic stainless steel belt and manufacturing method thereof

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Embodiment Construction

[0049] The composition of the embodiment is shown in Table 1, and the process route is shown in Table 2. In the process route of Table 2, pickling process is required before cold rolling process 1 and cold rolling process 2.

[0050] Referring to Figure 6, the molten steel that meets the composition requirements is passed from the ladle 1 through the tundish 2 and the submerged nozzle 3 into the molten pool formed by the rotating water-cooled crystallization roller 5 and the side sealing plate 5, and is cooled by the water-cooled crystallization roller 4 to form a 1-5mm The casting belt 6, the casting belt passes through the pinch roller 7, the conveying roller table 8 and the cooling control device 9, so that the temperature of the casting belt is lower than 600°C, then passes through the pinch roller 10 before coiling, and enters the coiler 11. The cast strip unloaded from the coiler is kept at a temperature of 1050-1150°C for 5-8 minutes, and then air-cooled for solid solut...

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Abstract

The present invention discloses one kind of continuously cast austenite stainless steel sheet band and its production process. The austenite stainless steel sheet band has the components including C 0.04-0.12 wt%, Si0.2-1 wt%, Mn 0.8-2 wt%, P not more than 0.04 wt%, S not more than 0.03 wt%, Cr 0.017-0.019 wt%, Ni 0.08-0.011 wt%, Sn 0.005-0.04 wt%, and Fe and inevitable impurity for the rest. Its production process includes the following steps: smelting, continuously casting to form 1-5 mm thick band and winding; solid solution treatment at 1050-1150 deg.c for 5-8 min; pickling, cold rolling, annealing at 1050-1100 deg.c for 3-8 min, re-pickling and cold rolling for the second time to reach required thickness. The present invention has utilization of Sn in waste steel, reduced residual ferrite, reduced nickel consumption, lowered production cost and raised comprehensive performance.

Description

technical field [0001] The invention relates to a method for manufacturing stainless steel, in particular to a thin-strip continuous casting austenitic stainless steel strip and its manufacturing method. Background technique [0002] Stainless steel is widely used in food machinery, sanitation facilities, kitchens, architectural decoration, automobiles, chemicals and electrical products due to its good corrosion resistance, high temperature resistance, high strength and toughness, exquisite appearance and excellent processability. In the stainless steel market, the demand for stainless steel sheets accounts for more than 80%, and the main product is stainless steel cold-rolled sheets. [0003] The traditional production process of stainless steel strip is completed by continuous casting, hot rolling and cold rolling. Generally, the thickness of the slab in the traditional continuous casting process is 200mm. There are two types of hot rolling production processes for stain...

Claims

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Application Information

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IPC IPC(8): C22C38/40C22C38/58C22C33/04B21B3/00B21B37/00C21D8/04C21D1/26C21D11/00B21D5/00
Inventor 于艳方园吴建春崔健
Owner BAOSHAN IRON & STEEL CO LTD
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