Nickel alloy seamless pipe and tube is a kind of special stainless steel tube. First of all, it is different from ordinary stainless steel 304 in chemical composition. It refers to a high-alloy stainless steel tube with high nickel, high chromium and high molybdenum.
Smelting: In order to obtain more pure molten steel, reduce the gas content and the content of harmful elements. At the same time, due to the presence of easily oxidizable elements such as Al and Ti in some alloys, non-vacuum smelting is difficult to control. In order to obtain better thermoplasticity, nickel-based heat-resistant alloys are usually smelted in a vacuum induction furnace, and even produced by vacuum induction smelting plus vacuum consumable furnace or electroslag furnace remelting.
In terms of deformation: forging and rolling processes are used. For alloys with poor thermoplasticity, they are even rolled after extrusion and billeting or are directly extruded with mild steel or stainless steel sheathing. The purpose of deformation is to break the casting structure and optimize the microstructure.
Casting: usually use vacuum induction furnace to smelt the master alloy to ensure the composition and control the gas and impurity content, and use the vacuum remelting-precision casting method to make parts.
Heat treatment: Deformed alloys and some cast alloys need to be heat-treated, including solution treatment, intermediate treatment and aging treatment, in order to obtain the required structure and good overall performance.
If you want to know more about Alloy Steel Seamless Pipe, please contact Huzhou Nanxun Yintuo Special Material Technology Co., Ltd.
