工艺参数对2124合金蠕变时效成形的影响  

Effects of Processing Parameters on Creep Aging Forming in 2124 Aluminum Alloy

作　　者：李炎光[1] 湛利华[1] 谭斯格[1] 

机构地区：[1]中南大学机电工程学院

出　　处：《特种铸造及有色合金》2011年第6期580-582,共3页Special Casting & Nonferrous Alloys

基　　金：国家重点基础研究发展计划(973计划)资助项目(2010CB731700)

摘　　要：对2124铝合金板状试样在185℃,时效5－15h及试验应力为150－250MPa条件下,采用RWS50型电子式蠕变松弛试验机进行拉伸蠕变时效成形试验,得到了不同时效时间和试验应力下材料的蠕变应变。通过金相观察、硬度（HV）测试等方法,在185℃×8h、185℃×12h,试验应力为200－250MPa条件下,得到了材料蠕变时效后的金相组织和室温硬度。结果表明,时效时间和试验应力对材料的成形有较大的影响。在185℃×（0－15）h,200MPa应力条件下,材料的硬度随时效时间的增加而增加。在15h时,材料达到最大硬度（HV）为136.7。蠕变速率、应变量和晶粒尺寸随时效时间、试验应力的增加而增大。Tensile creep aging treatment was conducted with 2124 aluminum alloy plate on the RWS electronic creep-relaxation testing machine with aging at 185℃ for 5~ 15 hours and 150~250 MPa to obtain creep strain of the alloy at different aging time and stress. Microstructure and ambient hardness of the alloy with aging at 185℃ for 8 hours and 12 hours as well as 200~250 MPa were presented by OM （optical microscope） and the Vickers hardness testing. The results show that material forming is closely related to aging time and stress. At a given 200MPa stress, hardness of the alloy is increased with increasing in aging time at 185 ℃ for 0~15 hours, and maximum hardness value of the alloy reaches up to 136.7 Hv for 15 hours. Creep rate, strain rate and grain size in the alloy are increased with the increase of aging time and stress.

关 键 词：蠕变时效成形 2124铝合金 蠕变时间 试验应力 

分 类 号：TG115.57[金属学及工艺—物理冶金]