热处理工艺对低碳齿轮钢带状组织评级的影响  

Effect of Heat Treatment Process on Identifying Banded Structure Grade of Low Carbon Gear Steel

作　　者：任琪 

机构地区：[1]山钢股份莱芜分公司特钢事业部,山东莱芜271105

出　　处：《山东冶金》2016年第5期43-45,共3页Shandong Metallurgy

摘　　要：试验分析了3种低碳齿轮钢(20Cr Mn Ti H、20Cr Mo H和SAE8620H)在正火、完全退火、等温退火等工艺处理后带状组织的变化情况,结果显示低碳齿轮钢在不同热处理制度下的带状组织存在明显差异。完全退火处理后钢材带状组织级别较热轧状态偏高;正火处理与等温退火处理后钢材的带状级别与热轧状态无明显差别。不易产生贝氏体组织的Cr-Mn-Ti系低碳齿轮钢,可以在热轧状态或正火处理后进行带状组织评级;Cr-Mo系和Cr-Ni-Mo系低碳齿轮钢,应进行完全退火或等温退火处理消除贝氏体等非平衡态组织后再进行带状组织评级。The change of microstructure of three kinds of low carbon gear steel （20CrMnTiH, 20CrMoH and SAE8620H） after normalizing, full annealing and isothermal annealing were analyzed. The results showed that there was a significant difference in the banded structure of low carbon gear steel in different heat treatments. The handed structure grade of full annealing was higher than that of hot roiling. There was no significant difference between the banded structure grade of normalizing （or isothermal annealing） and that of hot rolling. Banded structure grade of the low carbon gear steel containing Cr, Mn and Ti can be identified in hot rolling or normalizing state. The low carbon gear steel containing Cr and Mo （or Cr, Ni and Mo） should be full annealed or isothermal annealed before being identified banded structure grade.

关 键 词：低碳齿轮钢 带状组织 正火 完全退火 等温退火 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TG161[金属学及工艺—金属材料]