论文部分内容阅读
成分为0.54～0.63％C、0.5～0.9％Mn的整轧车轮钢的临界点如下:Ac_3850～775℃,Arq720～750℃,M开始275～295℃。当钢加热到800～830℃时发生完全奥氐体化。5％以下的铁素体(非网状形式)不致影响钢的韧性。为了保证轮辋截面上必要的组织和规定的机械性能,其淬火冷却速度应不低于200℃/分;辐板部分的冷却速度应不低于150°/分。这些条件
The critical points of the finished rolled steel with the composition of 0.54-0.63% C and 0.5-0.9% Mn are as follows: Ac_3850 ~ 775 ℃, Arq720 ~ 750 ℃, M start 275 ~ 295 ℃. When the steel heated to 800 ~ 830 ℃ occurred when the complete Austrian body 氐 body. Ferrite (non-reticular form) below 5% does not affect the toughness of the steel. In order to ensure the necessary section of the rim section of the organization and the prescribed mechanical properties, the quenching speed should not be less than 200 ℃ / min; web part of the cooling rate should not be less than 150 ° / min. These conditions