7、退火后硬度值。 表2-12 2Cr13钢的高温力学性能热处理制度试验温度℃бbMPaбsMPaδ5%ψ%αk105.J/m21000-1020℃油淬,720-750℃回火2070651021.068.06.37-17.130054439218.066.011.840051939716.558.520.145048537217.557.023.547048541222.571.0 50043135832.575.02555034127936.583.521.8试验温度,℃450470500530持久强度бb/1000 M