等温淬火对中碳低合金高硅铸钢力学性能的影响  

The Influence of Isothermal Quenching Parameters to the Mechanical Properties of Medium Carbon Low Alloy High Silicon As-steel

作　　者：黄志求[1] 金宝士[1] 

机构地区：[1]佳木斯大学材料科学与工程学院,黑龙江佳木斯154007

出　　处：《热处理技术与装备》2007年第5期42-44,51,共4页Heat Treatment Technology and Equipment

基　　金：黑龙江省教育厅科学技术研究资助项目(11511385)

摘　　要：研究了等温淬火工艺参数对化学成分（质量分数）为0．42％C，2．1％Si，1．64％Mn，0．9％Cr中低碳低合金铸钢力学性能的影响。光学显微组织、透射电镜组织以及XRD物相分析结果表明，试样在340—380℃范围内经等温淬火处理后，可以获得无碳化物析出的奥氏体-贝氏体组织，且随着等温淬火温度的升高，贝氏体形貌由板条状下贝氏体逐渐向上贝氏体转变，试样的硬度≥HRC40，冲击韧性ak≥120J／cm^2。Influence of isothermal quenching on the mechanical properties of cast steel（ chemical composi- tien is 0.42% C,2.1%Si,1.64%Mn, 0.9% Cr） was investigation. LOM, TEM and XRD were adopted to analyze the structure, The test results showed specimens obtained austenite- bainite microstructure without carbide after austempefing technology rang from 340 ℃ to 380 ℃ quenching. With isothermal quenching temperature increasing, the microstructure shape of specimens changed from lathing lower bainite to upper bainite. The hardness was HRC 44 ,and toughness was more than 120 J/cm^2.

关 键 词：铸钢 等温淬火 奥氏体-贝氏体 力学性能 

分 类 号：TG156.3[金属学及工艺—热处理]