多孔活定位冲裁新工艺

介绍了利用活定位的方法进行多孔冲裁的模具设计特点和生产工艺，经生产检验证明：产品质量达到了图纸要求，且模具结构简单，工人操作方便，灵活，生产效率大大提高，节省了机械加工工时，缩短了生产周期，解决了生产难题，经济效益显著。     

远程激光加工服务中心系统的研究与开发

概述了激光加工业的现状和市场特征，在比较了国内外远程制造的基础上，提出了一种基于Internet的远程湟加工服务中心系统模型，在此模型上建立了基于Web的服务中心信息管理系统，并论述了其关键技术，利用ASP技术及，DXF文件的特殊性实现了对二维板材加工的远程动态报价，同时也实现了用户认证，订单管理，商务洽谈，专家论坛等功能。     

一种新的变轴数控机床标定方法

本文论述了国内外并联数控机床所采用的标定方法，选择了序列法进行了标定试验。但在实际标定过程中，出现了部分数据误差较大的问题，本文针对所面临的问题，提出了数值逼近法，并应用到实际机床的标定中，获得了机床的相关参数。之后，通过数学模型的计算值和实际测量值对比，验证了数据的可靠性，从而验证了方法的可行性和正确性。     

摩托车后挡泥板冲孔模

分析了摩托车后挡泥板的冲孔工艺，着重介绍了摩托车后挡泥板冲孔模的结构。该模具布局合理，结构紧凑，提高了生产效率，降低了生产成本，从而降低了摩托车的造价，提高了摩托车的市场竞争力。     

新的易焊低合金高强度钢（HSLA）发展的巨大变化——热轧中厚板的发展路径

该文从战略角度分析了现代钢，轧钢中的显著成就，其目标是获取易焊的高韧性，高强度低合金钢，叙述了对传统碳当量的挑战，由于提高了钢的韧性，从而增加了结构的可靠性，并使结构设计简洁，经济。     

电磁半连续复合铸造轧辊的思路与实践

为了实现复合轧辊的顺序凝固，研制了电磁半连续复合铸造试验装置，利用该装置进行了一系列电磁半连续复合铸造试验，探索出了一套合理的电磁复合铸造工艺，制造了高铬铸铁／45#钢复合轧辊，并进行了装机试验。结果表明：电磁半连续复合铸造轧辊思路正确，装置简单合理，既实现了轧辊在复合过程中的顺序凝固，减少了铸造缺陷，又使复合界面达到良好结合，提高了轧辊质量和生产效率。     

全自动铝锭码垛机的设计

铝锭出厂前需经过码垛，称重，打捆等道工序，目前许多厂家铝锭码垛由人工完成，劳动劳动强度大，且码垛不齐，以至以称重，保管，运输中出现散包现象。本文介绍一种结构简单，工作可靠且自动化程度析型全自动铝锭码垛机，阐述了该机的组成，生产工艺和技术参数。使用结果表明，该机可完全替代人工码垛，从而大大降低了工人的劳动强度，提高了劳动生产率，同时由于采用了合适的铝锭外形，码垛质量提高，杜绝了散包现象。     

铝板带热轧工艺与产品质量的关系

强调了铝合金热轧带坯质量的重要性，介绍了铝合金热轧工艺的类型，列举了铝合金热轧板带的质量指标，着重叙述了厚度控制，板菜控制，温度控制，过程控制，表面质量控制的技术和方法。     

不停铸轧机更换耳子的实践

通过实践，改变了耳子的更换工艺，避免了由耳子破损等原因造成的生产中断和供料嘴报废，减少了消耗，降低了生产成本，提高了生产效率。     

铁路钢梁整体节点的焊接技术

京九黄河特大桥采用了整体节点新技术，该节点焊缝密集，其中不等厚板对接焊缝、棱角焊缝为我国桥梁首次采用，由于焊缝要求高，加大了焊接难度。本文通过选择合理的焊接工艺，确保了焊接接头的力学性能，消除了高温裂纹、咬肉及成形不良等缺陷，解决了长焊缝熔深不足和烧窗同时产生的难题，较好地控制了焊接变形，保证了焊接质量和工期。     

Effect of SiC volume fraction on the age-hardening behavior in SiC particulate-reinforced 6061 aluminum alloy composites

The age-hardening behavior in the SiC particulate-reinforced 6061 aluminum alloy composites (SiCp/6061 Al alloy composites) was investigated using hardness measurement, calorimetric technique and transmission electron microscopy. The aging time for the peak hardness in 10%SiCp/6061 Al and 20%SiCp/6061 Al alloy composites was shorter than that of the unreinforced 6061 Al alloy, and the age-hardening was most accelerated in the 20%SiCp/6061 Al alloy composite. It is induced from the high density of dislocations in SiCp/6061 Al alloy composites which act as heterogeneous nucleation sites of precipitates and as a high diffusivity path of alloy elements. The precipitation sequence and the aspect of precipitates in the 6061 Al alloy cannot be affected considerably by the presence of SiC particulate and the volume fraction of SiC particulate. The activation energies for the formation of the intermediate β' phase in the unreinforced 6061 Al alloy, 10%SiCp/6061 Al and 20%SiCp/6061 Al alloy composite were 142.6 kJ/mol, 127.3 kJ/mol, 106.1 kJ/mol, respectively.     

Effect of mischmetal and yttrium on microstructures and mechanical properties of Mg-Al alloy

The effect of yttrium and mischmetal(MMs)on the as-cast and solid solution treated structures of Mg-Al alloys with different Al-contents was investigated.The results show that the MMs in Mg-Al alloy existed in rod Al4(Ce,La)compound while Y in Mg-Al alloy in polygonal Al2Y compound.The amount of Mg17Al12 in Mg-Al alloy is decreased with increasing Y or MMs addition,and Mg17 Al12 intermetallic compound is changed from continuous network to discontinuous one.The Al4(Ce,La)and Al2Y compounds are not dissolved into Mg-Al alloy matrix during solid solution treatment so that their high heat stability can be exhibited.The experiment of mechanical properties indicate that elongation and impact toughness of the Mg-Al-Y alloy with polygonal Al2Y compound are higher than those of Mg-Al-MMs alloy with rod A4(Ce,La) compound.     

原位TiC颗粒对喷射沉积7093铝合金微观组织的影响

采用喷射沉积及原位反应喷射沉积方法制备7093铝合金及7093+TiC铝合金,研究试验合金420℃热挤压及不同固溶处理后的微观组织和力学性能。探索原位TiC颗粒对喷射沉积7093铝合金组织的影响。结果表明,原位TiC颗粒能够提高喷射沉积7093铝合金的再结晶温度10℃,当固溶温度达到490℃时,7093+TiC铝合金中的富Cu颗粒基本溶解,但并未出现过烧现象。采用450℃×3h+480℃×3h+120℃×24h的制度处理后,7093+TiC铝合金的抗拉强度达754 MPa,伸长率达7.1%。     

Mn-30Al中间合金对镁合金的晶粒细化

采用真空淬火炉制备出含ε-AlMn相的Mn-30Al中间合金和含γ_2-Al_8Mn_5相的Mn-30Al中间合金,观察了两种中间合金的组织,并探讨ε-AlMn相、γ_2-Al_8Mn_5相、Mn和Al对镁合金的晶粒细化效果.试验表明,相比添加Mn、Al,含γ_2-Al_8Mn_5相的Mn-30Al中间合金对AZ31镁合金存在一定的细化效果,含ε-AlMn相的Mn-30Al中间合金对AZ31镁合金具有更好的细化效果.当含ε-AlMn相的Mn-30Al中间合金添加量为0.4%时,AZ31镁合金的晶粒尺寸由原来的898μm减小至320 μm,Mg-Zn合金晶粒尺寸由原来的320 μm减小至180μm.通过面错配度计算,ε-AlMn可以成为初生α-Mg晶粒的良好异质形核核心.     

Formation of NiAl Intermetallic Compound by Cold Spraying of Ball-Milled Ni/Al Alloy Powder Through Postannealing Treatment

Ni/Al alloy powders were synthesized by ball milling of nickel-aluminum powder mixture with a Ni/Al atomic ratio of 1:1. Ni/Al alloy coating was deposited by cold spraying using N₂ as accelerating gas. NiAl intermetallic compound was evolved in situ through postspray annealing treatment of cold-sprayed Ni/Al alloy coating. The effect of annealing temperature on the phase transformation behavior from Ni/Al mechanical alloy to intermetallics was investigated. The microstructure of the mechanically alloying Ni/Al powder and NiAl coatings was characterized by scanning electron microscopy and x-ray diffraction analysis. The results show that a dense Ni/Al alloy coating can be successfully deposited by cold spraying using the mechanically alloyed powder as feedstocks. The as-sprayed alloy coating exhibited a laminated microstructure retained from the mechanically alloying powder. The annealing of the subsequent Ni/Al alloy coating at a temperature higher than 850 °C leads to complete transformation from Ni/Al alloy to NiAl intermetallic compound.     

不同合金元素对Mg15Al高铝镁合金组织与性能的影响

研究了不同合金元素（Zn,Nd,Si）对Mg15Al镁合金的组织和性能的影响。通过对Mg15Al,Mg15Al1Zn,Mg15Al1Si,Mg15Al1．5Nd四种合金微观组织的观察和力学性能的测定,发现添加了合金元素后Mg合金组织中α—Mg基体和β—Mg17Al12相都得到了不同程度的细化,其中Mg15Al1Si,Mg15Al1．5Nd合金组织中有第三相生成,其形态分别为汉字状、块状,长针状。试验结果表明：添加zn和Nd元素后,抗拉强度比Mg15Al合金显著提高。提高幅度分另4为：13．2％和16．6％,而添加si元素后Mg15Al1Si合金抗拉强度比Mg15Al合金低。添加Nd元素后,伸长率比Mgl5Al合金显著提高,增幅为140％,添加了Si元素和Zn元素后,伸长率比Mg15Al合金低。     

Microstructure and mechanical properties of Al–Si alloy modified with Al–3P

Al–Si alloy was modified with Al–3P master alloy at 740 °C. The effects of Si content (7, 8, 9, 10 and 11 wt.%) and adding amount of alterant Al–3P (0, 0.1, 0.3, 0.6, 1.0 and 1.5 wt.%) on microstructures and tensile properties of the alloy were investigated with optical microscope (OP), Image Pro Plus 6.0, scanning electron microscope (SEM) and universal testing machine. When the content of Al–3P is 0.6 wt.%, the area fraction of primary α(Al) in the Al–Si alloy increases more compared to the unmodified alloy with an increase in Si content, which could be explained by the movement of non-equilibrium eutectic point. When the Si content is constant (Al–10Si), with the increase of Al–3P content, the increased rate in area fraction of primary α(Al) phase in the Al–10Si alloy increases first and then decreases. And when 0.6 wt.% Al–3P is added, the increase in area fraction of primary α(Al) phase is the largest. Compared to the unmodified Al–10Si alloy, the tensile strength and elongation of Al–10Si alloy increase by 2.3% and 47.0%, respectively, after being modified with 0.6 wt.% Al–3P alloy. The fracture mode of the modified Al–10Si alloy is ductile fracture.     

含Nb的TiAl合金PAM过程质量变化

对比研究了在相同的真空度条件下纯Ti、纯Al、TiAl二元合金和TiAl-Nb三元合金PAM过程纽扣锭质量变化。结果表明，纯Al在PAM过程中质量随重熔次数的增加而递减。纯Ti在第一次熔炼时质量损失较多，但重熔过程中质量变化趋于稳定。这说明PAM过程中Al的挥发是造成合金质量损失的主要因素。TiAl二元合金和TiAl-Nb系合金在基本相同的熔炼条件下熔炼时，均由于Al过热度的增加而使质量损失增加。Al的质量损失随着熔炼次数的增加而增大，并且随Al含量的增加而增大。Nb的加入方式对纽扣锭的质量变化有影响。以纯Nb方式加入时的损失量高于以中间合金方式加入的损失量。对于TiAl-Nb合金，重熔6次后，其质量变化趋于稳定，也就是合金成分趋于均匀。TiAl-Nb合金重熔6次后质量相对损失只有0．33％，低于其他方法熔炼所引起的Al的损失。     

Al-Ti-B-Sr对Al-Si-Mg合金的变质细化作用

用快速凝固和热变形处理的Ａｌ－Ｔｉ－Ｂ－Ｓｒ中间合金,对Ａｌ－Ｓｉ－Ｍｇ铝轮毂材料进行处理,试验结果表明：Ａｌ－Ｔｉ－Ｂ－Ｓｒ中间合金可以对Ａａ－７Ｓｉ－０．３５Ｍｇ合金有效地细化与变质;改善Ａｌ－Ｔｉ－Ｂ－Ｓｒ的细化与变质效果,Ａｌ－Ｓｉ－Ｍｇ合金的抗拉强度和延伸率较Ａｌ－Ｔｉ－Ｂ、Ａｌ－Ｓｒ两种中间俣金分别外入时提高了约１０％和２５％。     

Effect of Sm on the microstructure and properties of Mg-9Al alloy

Effect of rare earth Sm on the microstructure and properties of Mg-9Al alloy was investigated. The results indicate that the microstructure of Mg-9Al alloy is refined by the addition of rare earth Sm. The tensile strength, elongation and corrosion resistance of Mg-9Al alloy are increased with increasing Sm. When the content of Sm is 1.0%, the tensile strength and elongation of Mg-9Al alloy are improved from 117.4 MPa and 4.0% to 136.84 MPa and 7.47%, respectively. And the corrosion resistance of Mg-9Al alloy is improved by 26.6% when adding 1.0% Sm. However, the properties of Mg-9Al alloy are decreased with the further addition of Sm.