LI Zongrui LU Zhongwu Northeast University of Technology
,
Shenyang
,
China
金属学报(英文版)
A criterion restraining mehod adopted to the dynamic optimization for materials heat- ing process has been developed,by regarding it as controlled object of a regulator in control theory and combining the optimal criterion of it.The method may be available to optimize fuel supply along furnace length and to provide a theoretical basis for the optimization of fuel supply in time-varying.For soaking pit,the calculation shows that in case of optimization by criterion restraining method,the thermal efficiency is 3.1 higher than the modelling prediction result.In comparison with heat flux-decomposing method,the thermal efficiency increased from 43.1 to 43.8%,and the energy consumption was reduced by 7.28% relative to the practical production data.
关键词:
optimization
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null
,
null
,
null
JIN Zhanpeng DU Yong Central-south Technological University
,
Changsha
,
China.
材料科学技术（英文）
The interaction parameters for various phases in the Ti-W and Pd-W systems were calcula- ted using phase diagram information by means of a numerical procedure.The approach differs significantly from the trial and error method and has the advantage of being very robust in the sense that one can make full use of the accurate experimental phase diagram data and deal with situations which are difficult or even impossible for the trial and error method. Using calculated parameters and lattice stability values for Ti,W and Pd given in literature, the diagrams of the above systems were recalcula- ted.The results are in good agreement with experimental information.
关键词:
optimization
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null
,
null
,
null
C. Q. Wang
,
X. J. Zha
,
C. Q. Zhang
,
S. Q. Yang
,
C. Z. Wang( 1)National Lab of Advanced Welding Technology
,
HIT
,
Harbin 150001
,
China 2)Shanghai Institute of Metallurgy
,
Chinese Academy of Science
,
Shanghai 200050
,
China)
金属学报(英文版)
Solder joint reliability is one of critical problems detemining whether Sirface Mount Technology (SMT) can be used in the prohotion of important electronic products. Optimizing solder joint shape is one of effective ways to improve SMT solder joint reliability.In this paper. based on the theorem of minimum potential energy, an energy model of 3 - D solder joint shape is established,and the forma- tion of solder joint is numerically simulated by Surface Ecolver program. On the basis of the prediction of SMT solder joint shape,the mechanical model of analyzing solder joint reliability is established. An elasto - plasto - creep mateial model and its mechanical constitutive equaton are established for SnPb solder alloy, and the stress/strain response of SMT solder joint under thermal cyclical loabing is ana- lyzed with nonlinear 3 - D FEM. The fatigue life of solder joint is predicted according to Coffin- Manson fatigue life model. An integrated system for Predicting and analyzing SMT solder joint shape and reliability(PSAR) is developed.The system can analyze efficiently SMT solder joint reliability with the variation of structural parameters in the joint and give the optimal structure.
关键词:
SMT
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null
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null
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null
王宇
,
黄金田
电镀与涂饰
为了提高木材纤维素微纳米纤丝化学镀银层的均匀性和包覆率,探究了氢氧化钠与硝酸银摩尔比、反应温度和乙醇用量对木材微纳米纤丝化学镀银增重率的影响.基于单因子试验分析结果,应用响应面法优化木材微/纳米纤丝表面化学镀银的条件,得到化学镀银增重率的三次多项式.对回归模型进行方差分析,得到其可决系数为0.988 4,说明该模型能够较显著地拟合上述3个因素对木材微/纳米纤丝化学镀银增重率的影响,最佳化学镀银工艺参数为:氢氧化钠与硝酸银摩尔比1.75,反应温度35℃,乙醇质量分数15％.该条件下由此模型预测的化学镀银增重率为333.67％,试验验证得到的增重率为332.89％,说明响应面法的优化合理可行.此时木材微/纳米纤丝表面的化学镀银层包覆完整、均匀.
关键词:
木材
,
纤维素
,
微纳米纤丝
,
化学镀银
,
增重率
,
优化
,
响应面法
,
回归模型
王冬林
,
闫凯
,
韩新利
,
李昱坤
,
卫栋
有色金属工程
doi:10.3969/j.issn.2095-1744.2015.05.010
通过三相分离器运行参数中的来液温度、药剂浓度、来液压力三因素对三相分离器原油处理效果的影响规律进行分析,并用正交试验法从来液温度、药剂浓度、来液压力三个方面进行了三因素、三水平分析,提出三项分离器运行参数的优化措施,优化后经实际验证,大大增强了三相分离器的原油处理效果.
关键词:
三项分离器
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参数
,
优化
,
原油含水
,
来液温度
,
药剂浓度
,
来液压力
王海霞
,
王军
表面技术
doi:10.16490/j.cnki.issn.1001-3660.2016.02.031
目的：对连续铸造过程中凝固模型表面喷雾冷却进行优化，实现表面温度的最优冷却。方法分析板坯的连铸工艺过程，推导板坯连铸的凝固模型，获得热传递方程式，对冷却过程的边界条件进行约束。对凝固模型进行仿真验证，与基准温度变化曲线进行比较。结合具体实例确定冷却过程中需要优化的目标对象，采取遗传算法搜索最优解，对相关参数进行仿真。结果和优化前相比，优化后板坯凝固过程中单位时间内温度变化波动较小，水流量密度最大值约为35 L/( m2·s)。结论优化后的板坯连铸过程中单位时间内喷雾冷却温度变化均匀，喷水量较少，能避免板坯连铸凝固模型表面裂纹的产生，提高产品的质量，效果较好。
关键词:
凝固模型
,
优化
,
遗传算法
,
板坯连铸
,
冷却
,
温度
,
仿真
黄征东
黄金
doi:10.11792/hj20170514
夹皮沟矿业公司选矿厂提金工艺为全泥氰化炭浆工艺,在10多年的运行中,通过对工艺不断地优化改造,如氰化隔炭筛、浸前浓密机溢流水全液静态吸附、含金废液炭吸附槽、氰化电积金泥、钢毛火法泼珠工艺、氰化作业运行方式、磨头筛筛孔、炭酸洗作业等优化改造,提高了金选冶回收率,且在节能降耗的同时降低了工人的劳动强度,改善了作业环境,取得了很好的应用效果.
关键词:
选冶工艺
,
全泥氰化炭浆
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优化
,
改造
,
回收率
,
金矿
,
节能降耗
罗伟严波
钢铁
利用ABAQUS有限元软件建立异型坯连铸结晶器铜板的三维有限元模型，并通过ABAQUS用户子程序施加传热边界条件，对现有的异型坯结晶器铜板温度场进行数值模拟研究，重点分析铜板热面温度的分布规律，并对其进行优化，得到合理的温度场分布。给出了水槽和水孔中冷却水流速、铜板厚度以及拉坯速度等工艺参数对结晶器铜板温度场的影响规律，为异型坯连铸结晶器和生产工艺参数的优化提供理论依据。
关键词:
优化
刘明
,
王海军
,
姜祎
,
宋亚南
,
郭永明
材料科学与工艺
为获得低孔隙率的Al2 O3-40％TiO2（ AT40）涂层，采用响应曲面法（ RSM）优化超音速等离子喷涂AT40涂层的工艺参数，利用Box-Behnken（ BBD）设计分析送粉量、喷涂功率、氩气流量、氢气流量4个主要因素对涂层截面孔隙率的影响规律，利用Design Expert软件设计试验方案，统计分析试验数据，并得到二次多元回归模型．研究表明，在本试验条件下，4种因素对孔隙率影响顺序依次为氩气流量＞氢气流量＞喷涂功率＞送粉量，最优工艺参数为送粉量30 g/min，喷涂功率51．4 kW，氩气流量3．0 m3/h，氢气流量0．45 m3/h，试验测得此时涂层孔隙率为2．74％．
关键词:
超音速等离子喷涂
,
响应曲面法
,
优化
,
孔隙率
任继文
,
成佐明
材料工程
doi:10.11868/j.issn.1001-4381.2015.07.006
为了改善8YSZ陶瓷的力学性能,以8YSZ双粒度粉体为研究对象,对其进行干压成型、无压烧结实验.对成型压力、保压时间及黏结剂用量等成型工艺参数进行了优化;利用正交实验对烧结方案进行了设计,讨论了烧结温度、升温速率、保温时间、烧结方式等烧结工艺参数对8YSZ陶瓷烧结性能和力学性能的影响,并优化出其烧结工艺参数.结果表明:选取PVA加入量10％(质量分数)、成型压力10MPa、保压时间30s的成型工艺参数,可压制出相对密度为54.9％的陶瓷坯体;选取烧结温度1500℃,保温时间4h,升温速率5℃/min,烧结方式裸烧的烧结工艺参数,可制备出相对密度为98.3％,抗弯强度为100.3MPa的8YSZ陶瓷.
关键词:
8YSZ
,
干压成型
,
烧结
,
正交实验
,
优化
