斜齿轮塑件注射模的脱模机构设计

分析了塑料斜齿轮的传动优点和工艺特点，介绍了斜齿轮塑件注射成型模具的齿形型腔旋转式和斜齿轮塑件旋转式两类脱模机构设计。     

冰箱抽屉注射成形的CAE优化

应用三维流动模拟软件HSCAE3D对冰箱抽屉的注射模具结构及工艺进行优化。通过几种方案的分析比较，获得了较满意的成形效果。     

Formation of surface coating on milling balls during milling of Cr powders

1　ＩＮＴＲＯＤＵＣＴＩＯＮＮｅｗｍａｔｅｒｉａｌｓ ,ｓｕｃｈａｓｄｉｓｐｅｒｓｉｏｎｓｔｒｅｎｇｔｈｅｎｅｄａｌｌｏｙ ,ａｍｏｒｐｈｏｕｓａｎｄｉｎｔｅｒｍｅｔａｌｌｉｃｓ ,ｃａｎｂｅｏｂｔａｉｎｅｄｂｙｍｅｃｈａｎｉｃａｌａｌｌｏｙｉｎｇｗｈｉｃｈｓｈ     

钛及钛合金基于等效压缩变形的固态焊接

以TC4和TA2为研究对象，探讨了利用钛及钛合金在固定约束条件下加热时的等效压缩交变实施固态焊接的试验研究，结果表明，在焊接温度为900℃，预压应力为56-80MPa，加热时间为600s的条件下，TC4/TC4，TC4/TA2和TA2和TA2的接头焊合率可达到88%以上，其中TC4由于在等效压缩变形过程中发生了较为明显的超塑性流变面更易实现基于等效压缩变形的固态焊接。     

孔隙性缺陷修复过程中材料扩散方式研究

孔隙性缺陷修复过程中, 由重结晶充满孔洞所需物质从基体材料中扩散而来, 材料的扩散能力对完成缺陷修复过程所需时间具有重要的影响。本文研究了孔隙性缺陷修复过程中材料扩散特性, 在不同温度条件下, 发现了至少存在着4种材料扩散方式, 其扩散能力相差较大。通过改变温度或加入其它物质, 扩散方式可以转变, 扩散速度能够得到控制, 这对于提高缺陷的修复能力, 有效消除大型锻件内部孔隙性缺陷具有重要作用。     

国产塑料模具钢应用实验研究

塑模钢的正确使用是提高塑料模具质量的关键，本文就国产塑模钢的应用，通过实际试验和应用实践作了专门研究，提出了一些国产塑模钢应用中存在的问题和解决办法。     

Mg-Cu-Y块体金属玻璃的塑性变形特性

通过对Mg-Cu-Y块体金属玻璃在深过冷液体区间塑性变形特性的研究，探讨了影响其塑性变形的因素及其影响规律。结果表明，加载温度和时间均对其塑性变形有明显的影响，在深过冷液体区间，要达到合适的变形量，加载温度和时间必须适中；Mg-Cu-Y块体金属玻璃在压缩条件下能够发生流变，较好地复制模具表面的显微形貌。同时，在加载条件下，Mg-Cu-Y块体金属玻璃更容易发生晶化。     

Plasma spray forming of functionally graded materials mould

A new technology of functionally graded materials(FGM) mould fabricated by plasma spraying and arc spraying was developed. According to applied characteristic of plastic mould, the reasonable coatings of FGM were designed and their microstructures were analyzed. At the same time, some key problems were solved including spray mould fabricating, FGM forming and demoulding, etc. The results show that the service performance of the FGM mould is much more excellent than the one composed of the traditional materials, and the life span can also be greatly increased. The technology will have a significant influence on materials development in mould industry.     

Effect of Al addition on formation and mechanical properties of Mg-Cu-Gd bulk metallic glass

The effect of partial substitution of Al for Cu on the glass forming ability（GFA） and mechanical properties of Mg65Cu25-xAlxGd10 （x=0, 1, 3 and 5, molar fraction, %） alloys were studied by X-ray diffi-actometry（XRD）, differential scanning calorimetry（DSC） and uniaxial compression test. The result reveals that GFA of the alloys changes slightly with increasing x from 0 to 3, and then abruptly decreases with x increasing up to 5. The plasticity can be greatly improved with appropriate substitution of Cu by A1 （3%, molar fraction） in Mg65Cu25Gd10 bulk metallic glass, and the resultant fracture strength, total strain to failure, and plastic strain are 898 MPa, 2.19% and 0.2%, respectively.     

铝板热轧机的液压AGC控制

介绍了铝板热轧机液压AGC系统的控制原理,以及AGC的几种控制方式。