通过用户网带炉淬火+回火热处理工艺，实现强韧性匹配。热处理工艺制度：奥氏体化温度900℃保温1小时，在620-630℃下保温2小时，控制10.9级耐火耐候螺栓（M20×70mm）室温下力学性能满足标准性能要求：Rm 1040-1240MPa，Rp0.2≥940MPa，A≥10%，Z≥42%，AKU≥47J，HRC在33-39HRC。

The matching of strength and toughness can be realized through the process of user mesh belt furnace quenching and tempering heat treatment. Heat treatment process: Austenitizing temperature 900℃ for 1 hour, 620-630℃ for 2 hours, control 10.9 grade refractory bolt (M20×70mm) mechanical properties meet the standard performance requirements at room temperature: Rm 1040-1240mpa, Rp0.2≥940MPa, A≥10%, Z≥42%, AKU≥47J, HRC 33-39HRC.