Research of exploitation of high temperature GX40NiCrNb 45-35 alloy

Abstract

In the paper, the properties and the structure of high temperature nickel-chromium alloy is discussed upon. The principal applications of the alloy are convection coil pipes and tubes sheets for furnaces. This alloy is considered one of the most important in the oilfield. Alteration of the alloy microstructure and conditions of the equipment exploitation are the principal factors that may cause a reduction of its operational life and destruction of the equipment. Hardness and microhardness tests of nickel-chromium alloy after 10 years of its exploitation as well as investigation of its microstructure and chemical composition had been arranged.