Changsha Xiangjia Metal Materical Co., Ltd.

Both hot-rolling and cold-rolling of   spiral pipes   are processes for shaping steel sections or plates, which have a significant impact on the microstructure and properties of the steel. In steel rolling, mostly hot-rolling is used, while cold-rolling is mainly utilized for manufacturing small-sized sections and sheets. First, hot-rolling can disrupt the casting structure of ingots, refine the grain size, and eliminate defects in the microstructure, thereby making the steel texture denser and enhancing mechanical properties. This improvement mainly manifests in the rolling direction, making the steel to a certain extent no longer isotropic; bubbles, cracks, and porosities formed during pouring can also be welded under the action of high temperature and pressure. Second, cold-rolling refers to processing plates or strips into various forms of steel through cold-working methods such as cold-drawing, cold-bending, and cold-extrusion at room temperature. It features rapid formin...

Q235B square pipe   is one of the products with increasing demand, especially in the fields of petroleum, chemical, power generation, automobile, shipbuilding, construction and environmental protection. The annual consumption is about 700,000 tonnes. Domestic Q235B square pipes have covered the variety specifications of the world's standards, and the specifications and varieties of shaped pipes are more than a hundred kinds. Next, we will discuss the differences between hot rolled and cold rolled Q235B square tube: 1, Cold-rolled structural steel allows for local buckling, thus better utilizing its load-bearing capacity, whereas hot-rolled structural steel does not permit local buckling of the cross-section. 2, Hot rolled steel and cold rolled steel residual stresses of different reasons, so they are also very different distribution of the cross-section. Cold-formed thin-walled steel section on the distribution of residual stress is curved, and hot-rolled steel or welded steel sec...

Alloy steel seamless pipes   play a crucial role in various industries due to their exceptional strength and durability. In this article, we will delve into the intricate process of manufacturing these pipes. Alloy steel seamless tubes are crafted by incorporating different metals and non-metals into carbon steel. The specific composition of alloy steel is tailored to meet the desired properties and performance requirements. For instance, the addition of manganese results in alloy steel with distinct characteristics compared to alloy steel infused with copper. The selection of additives is pivotal in determining the final quality and functionality of the alloy steel. The manufacturing process typically involves melting the base materials in a furnace at high temperatures to achieve a homogeneous mixture. This molten alloy is then shaped into seamless pipes through a specialized rolling or extrusion process. The pipes undergo multiple stages of heat treatment and precision machinin...