7Mn15Cr2Al3V2WMo无磁模具钢
价格:110.00
7Mn15Cr2Al3V2WMo钢的化学成分示于表2-31-1。表2-31-17Mn15Cr2Al3V2WMo钢的化学成分(GB/T1299—2000)w/%CSiMnCrMoWVAlPS0.65~0.75≤0.8014.5~16.02.0~2.50.5~0.80.5~0.81.5~2.02.7~3.3≤0.04≤0.037Mn15Cr2Al3V2WMo钢的物理性能示于表2-31-2~表2-31-5,其密度为7.81t/m³。表2-31-27Mn15Cr2Al3V2WMo钢的线(膨)胀系数温度/℃25~10025~20025~30025~40025~50025~60025~70025~80025~900线(膨)胀系数/℃-116.017.818.919.720.320.821.221.621.6表2-31-37Mn15Cr2Al3V2WMo钢的热导率温度/℃150300400500600700800900热导率λ/w·(m·k)-114.415.719.520.020.322.224.924.8表2-31-47Mn15Cr2Al3V2WMo钢的电阻率温度/℃150300400500600700800900电阻率/Ω·m1.05×10-61.15×10-61.17×10-61.23×10-61.25×10-61.31×10-61.33×10-61.35×10-6表2-31-57Mn15Cr2Al3V2WMo钢的磁导率状态磁导率μ/mH·m-11150℃固溶1180℃固溶1150℃固溶,700℃2h时效1180℃固溶,650℃20h时效1180℃固溶,700℃2h时效1180℃固溶,650℃20h时效,变形8.5%1180℃固溶,650℃20h时效,变形14.5%1180℃固溶,650℃20h时效,变形24.2%1180℃固溶,650℃20h时效,变形42.2%1.2602×10-31.2603×10-31.2639×10-31.2607×10-31.2602×10-31.2608×10-31.2608×10-31.2617×10-31.2704×10-37Mn15Cr2Al3V2WMo钢的热加工条件示于表2-31-6。表2-31-67Mn15Cr2Al3V2WMo钢热加工条件项目加热温度/℃加热时间/℃开锻时间/℃终锻温度/℃冷却方式钢锭钢坯1150~11701140~1160≥8≥81100~11201090~1110≥950≥950空冷空冷2.31.4热处理A预先热处理7Mn15Cr2Al3V2WMo钢的高温退火工艺示图2-31-1。B淬火7Mn15Cr2Al3V2WMo钢不同温度固溶和时效后的力学性能示于表2-31-7,推荐的固溶处理规范示于表2-31-8。表2-31-77Mn15Cr2Al3V2WMo钢不同温度固溶和时效后的力学性能热处理制度σb/MPaδ/%ψ/%αK/J·cm-11180℃固溶82072061.060.061.562.52302402401150℃固溶,700℃2h时效13701370138016.515.518.034.035.535.54845451165℃固溶,700℃2h时效3639401180℃固溶,700℃2h时效151014904.54.58.59.5151313表2-31-87Mn15Cr2Al3V2WMo钢推荐的固溶处理规范固溶温度/℃保温时间/℃冷却介质固溶硬度(HRC)1150~1160盐溶炉1520或空气炉水20~22注:因固溶温度较高,易氧化、脱碳,应采用盐溶炉加热。C回火7Mn15Cr2Al3V2WMo钢不同状态时的硬度示于表2-31-9,推荐的时效规范示于表2-31-10,气体软氮化示于表2-31-11,与回火有关的曲线示于图2-31-2和图2-31-3。表2-31-97Mn15Cr2Al3V2WMo钢不同状态时的硬度状态锻造退火固溶时效硬度(HRC)33~3528~3020~2247~48表2-31-107Mn15Cr2Al3V2WMo钢推荐的时效规范时效温度/℃保温时间/h冷却介质时效硬度(HRC)650700202空气空气48.048.5表2-31-117Mn15Cr2Al3V2WMo钢气体软氮化氮化温度/℃氮化时间/℃氮化层深度/mm氮化层硬度(HRC)560~5704~60.03~0.03950~1100注:为提高模具硬度和耐磨性而采用软氮化。)
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