What is the application of Q235B heavy plate

Q235 heavy plate mainly has the following application areas: 1. In terms of kitchen appliances, there are mainly sinks, shelves, cabinets and other overall facilities. 2. In the field of transportation, it is used in railway vehicles and automobile exhaust systems, bumpers and exterior trims. This alone has a global demand of 2 million tons. 3. The construction industry is also a major consumer of stainless steel pipes. It is used in roofs, interior and exterior decoration of buildings, home stairs, guardrails, and protective nets, and then replaces carbon steel for more beautiful performance. 4. It has excellent properties not available in many other metals, and has excellent corrosion resistance and recyclable performance. From aviation to navigation, from home to factory, the charm of stainless steel is fully exerted. As people's understanding of stainless steel pipes continues to deepen, their practical scope will become more extensive.

Properties of Q235B heavy plate

The hardenability is low, so a 10% saline solution with a large cooling rate should be used. After the workpiece enters water, it should be hardened, but not cold. If the workpiece is cold soaked in brine, it may crack the workpiece. This is because when the workpiece is cooled to about 180 ° C, austenite is rapidly transformed into martensite. Caused by excessive tissue stress. Therefore, when the quenched workpiece is rapidly cooled to this temperature region, a slow cooling method should be adopted. Because the temperature of the effluent is difficult to grasp, it must be operated by experience. When the jitter of the workpiece in the water stops, the effluent can be air-cooled (if oil cooling is better). In addition, the workpiece should not move or enter the water. It should be regularly moved according to the geometry of the workpiece. The stationary cooling medium plus the stationary workpiece results in uneven hardness and uneven stress, which deforms the workpiece and even cracks.