The Characteristics of Refractory Steel and Its Development and Application in Petroleum and Other Fields

Abstract Because the strength of structural steel decreases sharply at high temperature, it must be sprayed with fire-resistant coating or fire-resistant materials for composite use. The strength of refractory steel can be reduced by no more than 1/3 of the room temperature at high temperature, and maintain good high temperature strength. This article mainly summarizes the development history of refracto-ry steel in China and other countries, analyzes the material selection basis and strengthening mecha-nism of refractory steel, and finds that by combining Mo element solid solution strengthening, phase transformation strengthening, and Nb, the strength guarantee of refractory steel at high temper-atures and V element precipitation strengthening are obtained. Designers can calculate the service temperature of steel structure through the initial stress and design strength of components to select refractory steel. Finally, the application status of refractory steel and its application prospect in the field of oil rescue are summarized and prospected.