Study on Low-temperature Toughness of 07MnNiCrMoVDR Welded Joint
07MnNiCrMoVDR steel and welded joint were studied.The effects of temperature on low-temperature toughness and define ductile-brittle transition temperature of 07MnNiCrMoVDR steel were studied by impact test.The results show that low-temperature toughness of 07MnNiCrMoVDR welded joint decreases with the decrease of temperature.The ductile-brittle transition temperature of welded joint is less than the lowest used temperature(-40℃).So,07MnNiCrMoVDR steel and welded joint can meet the request of application.