Overheating can result in over tempered martensite ( OTM ) or untempered martensite ( UTM ) formations in the base metal .

过热会造成在本体金属中形成过回火马氏体（OTM）或者欠回火马氏体（UTM）。

The influence of heating temperature , forging-ending temperature and cooling speed on the mechanical properties of untempered 45V steel is investigated .

研究了加热温度、终锻温度、冷却速度对45V非调质钢力学性能的影响。

Application of untempered steel in construction machinery

非调质钢在工程机械上的应用

The heated temperature , the final forging temperature and the cooling speed are the important factors which influence the performance of untempered steel .

锻造加热温度、终锻温度和冷却速度是影响非调质钢性能的重要因素。