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连续退火冷却速率对热镀锌双相钢DP780屈服平台的影响鲍成人1,李众1,谭谨峰1,邸洪双2,潘恩宝3(1.河北省唐山市首钢京唐钢铁联合有限责任公司冷轧作业部2.东北大学 轧制技术及连轧自动化国家重点实验室,辽宁沈阳 1100043.东北大学轧 制技术及连轧自动化国家重点实验室,辽宁沈阳 110004)摘 要:采用光亮连续退火模拟试验机研究了热镀锌双相钢DP780在连续退火中不同冷却速率对其组织和屈服现象的影响.试验结果表明:随着冷却速率的提高,组织中马氏体含量增加,晶粒尺寸减小.当冷速低于12℃/s时,应力应变......
新型Q-P-T和传统Q-T工艺对不同C含量马氏体钢组织和力学性能的影响张柯1,许为宗1,郭正洪1,戎咏华1,王毛球2,董瀚2(1.上海市上海交通大学材料科学与工程学院2.钢铁研究总院 先进钢铁材料技术国家工程研究中心,北京 100081)摘 要:对比新型淬火-分配-回火(Q-P-T)和传统淬火-回火(Q-T)处理对中,低碳钢力学性能的影响发现,在提高材料的强塑积方面Q-P-T处理远胜于Q-T处理,特别是对中碳钢的效果更为显著.在所研究的试样中,Fe-0.42C-1.46Mn-1.58Si-0.028Nb合金的强......
N含量对29Cr铸造超级双相不锈钢组织及性能的影响向红亮1,黄伟林1,刘东1,何福善1(1.福建省福州市福州大学机械工程及自动化学院)摘 要:制备了含N量分别为0.11%,0.26%和0.42%的29Cr铸造超级双相不锈钢,利用XRD,SEM,EDS,电化学工作站和XPS研究了含N量对双相不锈钢显微组织,力学性能和耐蚀性的影响.结果表明:N能增加双相不锈钢中奥氏体含量,并且有φ(γ)=60×ω(N)+21.97的线性关系;由于N具有固溶强化和降低(Mn,Cr)S夹杂粒子的作用,能有效提高材料的抗拉强度和延伸率,......
was also evaluated by free-expansion test. The results show that there exists a quick decrease of total elongation along hoop direction at the temperature range of 150-230 ℃, which is quite different from that along axial direction. The total elongation along hoop direction of welded tube is quite close to that of seamless tube until 230 ℃ is reached. At higher temperature, the total elongation......
Mn和P在超低碳烘烤硬化钢中的分布形态及其对拉伸行为的影响研究王华1,史文1,符仁钰1,李麟1(1.上海市上海大学材料科学与工程学院)摘 要:将2种不同成分的烘烤硬化钢(BH-Mn钢和BH-P钢)加热至800℃,保温2 min后水淬;采用3DAP技术,内耗实验及拉伸性能检测分析Mn和P对超低碳BH钢的间隙原子分布及Cottrell气团的影响,从而得出固溶元素分布对拉伸行为的影响机制.结果显示,在BH-P钢中,P以明显的偏聚形式存在,并和C发生共偏聚现象,从而造成对位错的强烈钉扎,这是导致拉伸过程中BH-P钢产生......
behavior were investigated. After thermomechanical treatment, the alloy exhibited an ultra-high tensile strength of 1204 MPa and the applicable elongation of up to 6.2%. With the increasing exposure time.... Key words: CuNiMn alloy; ultra-high strength; elongation; corrosion Cite this article as: TANG Shuai-kang, LI Zhou, GONG Shen, XIAO Zhu. Mechanical property and corrosion behavior of aged Cu-20Ni-20Mn......
, Northwest Polytechnical University, Xi’an 710072, China Received 28 July 2006; accepted 15 September 2006 Abstract: Elongation and springback are the bottleneck problems of thin-walled aluminum... bending is established based on the DYNAFORM platform. The process of thin-walled aluminum alloy tube NC precision bending is simulated with the model and the elongation and springback of tube......
mechanical properties of the alloy with 0.3% Mo and 0.1% RE were obtained. The elongation, tensile strength, impact toughness and hardness of the alloy reaches 7.21%, 577.49 MPa, 91.7 J·cm-2 and HRC 24.6, respectively. Key words:mechanical properties; elongation; tensile strength; impact toughness; hardness; rare earths; [全文内容正在添加中] ......
of transformation elongation (dε/dT) of the TGA treated wire was found to be 0.16 %/K. By annealing the specimen under the temperature gradient from 823 K to 658 K after 47 % cold working without solution treatment, the B19'' martensitic transformation start temperature changed by 61K along the length of sample(150mm). Temperature dependence of transformation elongation (dε/dT) of the TGA treated......
properties of post-extrusion of the two kinds of billets all are obviously improved compared with those of pre-extrusion. The elongation of post-extrusion using the billet with homogenizing is higher than that without homogenizing, but the tensile strength is lower than that without homogenizing. When the extrusion ratio increases, the elongation and tensile strength of post-extrusion of two kinds......
