The oxide film on the surface of the hot-rolled seamless pipe is thin and high in density, and it is not easy to fall off. Under normal circumstances, the hot-rolled seamless pipe will cause 0.2-0.3mm oxide scale in the heat treatment equipment, and the casting defects in this range will be It can be removed with the oxidation of…
Read MoreSeamless steel pipes are often used as raw materials for ring-shaped metal material parts, which not only saves a lot of complicated technological processes, but also greatly reduces the wear and tear of stainless steel plates in the production process and saves product costs. The basic principle of this kind of production and processing is not difficult to understand….
Read MoreThere are many kinds of quality inspection methods for large-diameter seamless pipes, and physical methods are also the most common inspection methods. Physical inspection is a method of using some physical changes to carry out measurement or inspection. The inspection of the internal defects of raw materials or large-diameter seamless steel pipes is generally carried out by non-destructive testing….
Read MoreHow to test the quality of hot rolled seamless steel pipe? 1. High quality inspection of permeable layer and core. Check whether the strength of the surface and the core meets the technical standards, whether the gradient direction of the intensity conversion from the surface to the interior is effective, and whether the surface strength is consistent; 2. Check…
Read MoreUnder the background of advocating low-carbon, energy conservation and environmental protection, all kinds of transportation machinery are also developing in the direction of lightweight. In this paper, the mature TRIP steel production technology is applied to the production of steel pipe, and the thin-walled TRIP steel seamless pipe with ferrite, bainite, residual austenite and a small amount of martensite…
Read MoreThe mechanical properties of steel are important indicators to ensure the final performance of seamless pipe, which depends on the chemical composition and heat treatment system of the steel. In the seamless pipe standard, according to different use requirements, the tensile properties, hardness and toughness indicators, as well as the high and low temperature properties required by users, are…
Read MoreAlloy seamless pipe is a pearlite heat-resistant alloy structural steel, which has good high-temperature mechanical properties, high plasticity during cold deformation, no tempering brittleness tendency, good machinability and acceptable weldability. It is generally used under high-temperature normalizing and high-temperature tempering; It is mainly used for superheater tubes with working temperature of 570 ~ 585 ℃ in pressure boiler, pipeline…
Read MoreIndex analysis of mechanical properties of seamless pipes (smls pipe): 1. The performance index analysis of seamless pipe–plasticity. Plasticity refers to the ability of metal materials to produce plastic deformation without being damaged under load. 2. Analysis of performance index of seamless pipe–hardness. Hardness is a measure of the hardness of metal materials. At present, the commonly used method…
Read MoreXINYUE STEEL GROUP set up several production bases in Tianjin & Hebei Province, manufacturing ERW Steel Pipe, SSAW Steel Pipe, LSAW Steel Pipe, Seamless Steel Pipe, Scaffolding system and couplers, RHS, SHS, etc.
