Investigation of the Material Welding Using the High-Speed Liquid Impact

Feasibility to use the high-speed liquid impact for joining similar and dissimilar metals was investigated experimentally. An experimental setup that entails a launcher for projectiles formation and samples folders was constructed. The experiments involved joining of sandwiches containing two or three layers of metals were impacted by a high-speed projectile. The metals combinations included copper, brass, steel, and nickel alloys. The generated samples were examined visually, the strength of the joint was explored, and the integrity of the weld was estimated using ultrasound. In most of the experiments metallurgical bonding of joined metals was confirmed. The results of the ultrasound test demonstrated high quality of the generated joints. The performed experiments showed feasibility of the liquid impact-based welding. This process is the improvement of the explosion welding. Unlike the explosion welding impact-based process does not require special placing of work pieces while the stresses in the impact zone can be precisely directed and controlled. This article was presented at Materials Science & Technology 2007, Automotive and Ground Vehicles symposium held September 16-20, 2007, in Detroit, MI.     

Liquid Impact Based Material Micro-Forming Technology

The objective of this study was to investigate material deformation in the course of a high-speed (>1500 m/s) water impact and to use the acquired knowledge for improvement of the forming technology. An experimental setup for projectile fabrication was constructed and a series of experiments involving sub-millimeter and micron scale metal deformation was performed. The geometry and topography of the generated samples were investigated using advanced surface examination techniques and the feasibility of the liquid impact based micro-forming technology was demonstrated. This article was presented at Materials Science & Technology 2006, Innovations in Metal Forming symposium held in Cincinnati, OH, October 15-19, 2006.     

挤压浸渗刹车盘模具设计

分析了某刹车盘用挤压浸渗工艺成型的可行性,依据刹车盘零件图设计了挤压浸渗工艺的锻件结构,根据挤压工艺要求设计了刹车盘模具和模架,模具结构合理,生产的零件符合要求,且模架可用于不同类型的刹车盘模具。     

管子钳铝合金钳套液态挤压工艺及模具设计

采用液态挤压代替压力铸造及热模锻生产铝合金钳套，不仅克服了压铸件内部容易形成气孔和氧化夹杂的缺陷，而且减少了热模锻的投资、提高了材料利用率及降低了产品成本。本文介绍了钳套材料、挤压件设计、模具结构，分析了液态挤压的工艺参数及选择依据、产品技术经济性。     

管子钳铝合金钳柄体液态挤压工艺及模具

采用液态挤压代替热模锻生产铝合金钳柄体 ,可显著提高材料利用率、减少成形工序及降低产品成本。介绍了钳柄体材料、锻件设计、模具结构 ,分析了液态挤压的工艺参数及选择依据、产品技术经济性     

硅线石陶瓷用于钢平法兰液态模锻模具的试验研究

介绍了硅线石陶瓷液态模锻模具(模芯)的成形过程及其应用于钢平法兰液态模锻的工艺实践,结果表明,陶瓷模可使液态模锻制件的质量提高,但同时也容易损坏。分析了损坏原因,并提出了改进意见。     

H11钢锻模液态模锻试验与模具结构改进

介绍了对H11钢锻模液态模锻试验的工艺流程,分析了原模具结构的不足,并进行了改进。模具设置了防飞溅装置、冷却系统及溢流装置。结果表明,得到的液态模锻制件的尺寸和性能都达到了设计要求。     

高铝锌基合金耐磨衬板液态模锻工艺研究

叙述了选用ZA27合金采用液态模锻工艺生产耐磨衬板的研究,确定了模具材料的选择及其热处理工艺,对不同比压及不同模具预热温度条件下液锻件的微观组织进行了对比分析。实践证明,液态模锻工艺生产的耐磨衬板尺寸精度高,零件表面粗糙度值低,使用效果优良。     

液态正挤压工艺试验研究

液态挤压是在液态模锻基础上发展起来的管材成形方法。本文给出了液态正挤压过程的实质、管材成形模具和工艺参数、试验结果及其分析,为完善和推广该工艺提供了依据。     

Mechanics and forming theory of liquid metal forging

1　INTRODUCTIONIntheliquidmetalforging process ,metalwasdirectlypouredintothediecavity ,thenmechanicalstaticpressurewasappliedbyanoilpresswhichmadetheunsolidifiedandquasi solidifiedmetalflowsolidifywithlittleplasticdeformation .Becauseliquidmetalorquasi solidifiedmetalareeasytoflow ,theprocesscanbecarriedoutwithrelativelylowerconsumptionofdeformationenergy .Comparedwithcasting ,thewayoffeedingwaschanged .Inthesolidificationofliquidmetal,thevolumecontractionwouldresultintheemergenceofthesh…     

农药泵铜合金阀体液态挤压工艺

采用液态挤压代替压力铸造及热模锻生产农药泵铜合金阀体，不仅消除了压铸件内部容易形成气孔，疏松及非金属夹杂的缺陷，而且减少了锻造设备的投资及提高了材料利用率和成品率，本文介绍了铜合金阀体液态挤压的模具结构及设计参数，分析了液态挤压的工艺参数及选择依据，产品的技术经济。     

轿车铝合金油泵壳体液态挤压工艺

采用液态挤压代替压力铸造及热模锻生产轿车铝合金油泵壳体,不仅克服了压铸件内部容易形成气孔和氧化夹杂的缺陷,而且减少了热模锻的投资及提高了材料利用率。本文介绍了铝合金油泵壳体液态挤压的模具结构及设计参数、技术经济分析。     

T形锻件挤压模设计

T形锻件因形状所致,其挤压成形无法采用传统的整体凹模结构。现给出了T形锻件无飞边挤压模具结构。该模具采用斜面自锁纵向对合凹模结构,侧面设有凹模顶出装置,锻件在两半凹模和凸模形成的封闭模腔中挤压成形,生产的锻件无飞边。     

Ni－Cr－B－Si合金粉末等离子喷涂层的高温性能及其在滚锻模上的应用

研究了Ｎｉ－Ｃｒ－Ｂ－Ｓｉ合金粉末等离子喷涂层的高温抗氧化性能、耐磨性、热稳定性，并介绍了其在连杆毛坯滚锻模上的应用．结果表明，这种涂层的某些高温性能大大优于５ＣｒＮｉＭｏ钢，在冲击载荷不大的场合，可以作为热锻模的强化方法．     

摩托车铝合金轮毂液态模锻

采用液态模锻代替压力铸造生产摩托车铝合金轮毂，克服了制件内部容易产生气孔及强度差的缺点．介绍了其液态模锻模具结构及解决锻件热处理后产生气泡的措施和防止粘模的方法．     

GCr15钢花键轴套冷挤成形

对GCr15钢花键轴套零件的冷挤压工艺进行了分析 ,制定了先正挤花键后镦挤球头体的挤压方案 ,并介绍了该零件的冷挤压模结构及其特点     

液氮冷却模具技术在铝型材挤压生产中的应用研究

简要介绍了液氮冷却模具技术的基本原理以及常用的冷却通道布置方法。通过收集现场生产试验数据,分析了铝型材挤压过程中液氮冷却模具技术对模具温度、挤压速度、出料口型材温度及其表面光洁度的影响。结果表明:采用对模垫的液氮冷却技术是可行的;液氮开度值设定为70%时,模具温度显著下降,挤压速度最高提速可达37.5%,出料口型材降温幅度达到最大4.6%,型材表面光洁度明显提高;采用液氮冷却模具技术,大大提高了铝型材生产效率和表面质量。     

铜合金拨叉液态模锻工艺及模具设计

采用液态模锻代潜压力铸造及热模锻生产汽车铜合金拔叉,不仅消除了压铸压铸件内部容易形成气孔,疏松及非金属夹杂的缺陷,而且减少了锻造设备的投资及提高了材料利用率和成品率。     

铝合金螺旋桨液态模锻模具设计

介绍了采用液态模锻方法成形螺旋桨工艺 ,设计了液态模锻工艺用锻件图和试验用模具 ,在模具上进行了螺旋桨的液态模锻成形试验 ,并测试了锻件性能     

炮弹壳体液态模锻模设计

采用液态模锻工艺生产杯形、薄壁深筒形炮弹壳体,依据零件图设计了液态模锻工艺用锻件图、试验用模具,并生产出试验产品。经过试验产品分析,最终设计制造出生产用模具。模具结构简单、紧凑,工作平稳,生产的零件符合设计要求。