Obtaining method of tempering temperature range and application thereof, evaluation method of applicability of temper bead welding, and implementation method of temper bead welding

原文（中国語）

An obtaining method of the tempering temperature range includes following operations: determining a determination criterion of a tempering weld bead effect of a steel obtained after a welding of; determining an Actemperature at which the steel begins to form or transform into austenite during a welding heating process; obtaining a temperature field distribution during a welding process, and determining a thermal cycle curve and a size distribution of the temperature field in different temperature ranges; using different peak tempering temperatures to simulate the thermal cycle curve and test performances on a microstructure of a weld coarse grained region, and determining a lowest peak temperature Tw and a highest peak temperature Tp meeting the determination criterion; and obtaining the tempering temperature range ΔTw according to the highest peak temperature Tp and the lowest peak temperature Tw of the steel, wherein Tp=Acfor some steel.