What matters need attention in the production of weathering steel landscape(2)

When weathering steel landscape is produced, there are those matters that need to be paid attention to when producing, as

Weathering steel landscape

Manufacturers, let Xiaobian take you to understand!

(1) The internal component segregation of weathering steel landscape ingot is serious, especially C, S, P and other elements. Smelting and ingot should be paid attention to.

Due to the slow crystallization process of the inner solidification of large ingot, small inclusions converge into large inclusions that can be seen by naked eye or detected by ultrasonic detection. The lower part of the ingot is prone to some silicate deposits, which should be removed during the forging process.

(2) After the forging of the weathering plate, it is often possible to obtain non-uniform, coarse recrystallization grain structure, and the grain structure size of austenite is generally 3 to 4, and sometimes even larger. Weathering plates cannot be forged in a single fire. It needs to be heated a few times and forged a few times.

Weatherboard products are mainly used in structural parts of Chinese manufacturing enterprises, such as containers, railway vehicles, oil derricks, port buildings, oil company production management platform development and data from corrosion and chemical media containing sulfur container oil equipment. Due to these characteristics and the influence of segregation and inclusion, the core of the weathered plate should be fully forged, and the forging ratio should be in the range of 2.5 to 4, so that the internal structure of the ingot is uniform, cracked, and loosened by welding.

(3) In the process of heating and natural cooling system, the temperature difference between the inside and outside of the weathering plate has a large impact, and the thermal stress and structural design stress of the structure are also large, which may cause cracking due to improper treatment of heating and rapid cooling methods. Due to the large cross-section size of hydrogen, it is difficult to escape, so it is necessary to prevent white spots.

The rapid cooling of the weathering board after tempering will also produce residual organizational structure stress, which has a great impact. For example, the 34CrNi3Mo steel with a diameter of 700mn was forged 650 times. For example, in some of the ground landscape parks, these issues are a red steel floor, which can be folded or twisted according to the different topography of the enterprise and the surrounding structure, with a continuous strip covering the entire social national cultural park.

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