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13020559675
+86 13020559675
sales01@jianshousteel.com
Tel: +86 13020559675
E-mail: sales01@jianshousteel.com
Address: Huitong International Logistics Park, Liaocheng City, Shandong Province
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+86 13020559675
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National E-mail:
National Hotline:
+86 13020559675
Mobile: +86 13020559675
Email: sales01@jianshousteel.com
Add: Huitong International Logistics Park, Liaocheng City, Shandong Province
Stainless steel plate is divided into two types: hot rolling and cold rolling, including 0.02-4mm thick thin cold plate and 4.5-50 mm medium thickness plate.
According to the structure characteristics of steel, it can be divided into five types: austenite ferritin, Ferritic, martensite and precipitation hardening.
It is required to withstand the corrosion of various acids, and is widely used in chemical, food, paper, petroleum, atomic energy and other industries, as well as various parts of buildings, kitchenware, tableware, vehicles and household appliances.
In order to ensure that the mechanical properties of various stainless steel plates such as yield strength, tensile strength, elongation and hardness meet the requirements, the steel plate must be annealed, solution treated and aging treated before delivery.
The corrosion resistance of stainless steel mainly depends on its alloy composition (chromium, nickel, titanium, silicon, manganese, etc.) and the internal structure, and the main role is chromium. Chromium has high chemical stability, can form passivation film on the steel surface, isolate metal from the outside, protect the steel plate from oxidation, and increase the corrosion resistance of steel plate. After the passivation film is destroyed, the corrosion resistance decreases.
The edge scale defects formed in the production process of stainless steel cold-rolled sheet are mostly short needle like thin wire, the length is about 5-8mm, and a small amount of length can reach 120mm or even longer. The edge scale and normal rolling surface are not in the same plane, the depth is 5-25lm, the bottom and side surface are rough and uneven, the normal rolling place is relatively flat, the boundary between narrow edge scale and normal rolling surface is not obvious, the boundary between wide edge scale and normal rolling surface is obvious.
Because the inclusions in stainless steel plate edge are mainly chromium oxide and iron oxide. Therefore, the main reason for the formation of edge scale defects is that the pressed iron scale forms grooves on the surface of stainless steel strip. After pickling, the oxide scales in the upper and middle parts of the groove will be removed, and there will still be residual oxide scales on the edge of the groove that are not cleaned by pickling.
Low temperature annealing has little effect on the yield strength of 304 stainless steel. Annealing at 500 C has little effect on the yield strength of 304 stainless steel. High temperature annealing has higher effect on the yield strength of 304 stainless steel. When the preform is 15%, re decreases to 260mpa after annealing at 1050 C, and RM almost decreases linearly with the annealing temperature, but the change range is much smaller than re. The Vickers hardness decreases with the increase of annealing temperature.
With the increase of annealing temperature, the elongation of the sample increases significantly, especially in the high temperature annealing state, re decreases significantly and reaches the complete softening state. When annealed at 1050 C, elongation A and hardness HV reach the combination of softening.
Tel: +86 13020559675
E-mail: sales01@jianshousteel.com
Address: Huitong International Logistics Park, Liaocheng City, Shandong Province
