1) Dimensional change
尺寸变化
1.
Dimensional change and its control play an important role in the production process and the cost of PM steel components.
烧结零件的尺寸变化及控制对其生产过程及成本至关重要。
2.
The dimensional change of 2A12 aluminum alloy by microarc oxidation in silicate electrolyte has been investigated.
研究了2A12铝合金在硅酸盐电解液中微弧氧化的尺寸变化。
3.
The dimensional change models were developed for conversion of preceramic polymer- filler systems into ceramic bulks during pyrolysis, such as pure preceramic polymer, polymer containing an inert filler phase, polymer containing an active filler phase, and polymer containing inert filler and active filler phases.
对单一先驱体、先驱体／惰性填料、先驱体／活性填料体系裂解陶瓷的尺寸变化进行了模型分析，从理论上分析了活性填料体积分数与裂解陶瓷体积收缩率和线收缩率之间的关系。
2) dimension change
尺寸变化
1.
The full analysis and summarization on the dimension change regulation and factors and mechanisms affecting heat treatment distortion have been made,and the practical countermeasure has been given to reduce heat treatment distortion of the bearing components.
对轴承零件热处理后尺寸变化规律及影响轴承零件热处理变形的各种因素及机理进行了全面分析和总结 ,并提出了解决轴承零件热处理变形的具体措施。
3) dimension variance rate
尺寸变化率
1.
Bi can refine primary silicon phase and improve mechanical properties,wear resistance of ZA40 alloy obviously,and at the same time reduce dimension variance rate to improve the dimensional stability.
尺寸变化率减小,稳定性提高。
4) dimensional change
尺寸变化，几何尺寸改变
5) sintering dimension change rate
烧结尺寸变化率
1.
At the same time,when temperature is continually increased,dynamic change law of the heat expand coefficient is also studie,it shows that the composite material has very small sintering dimension change rate,as well as having lower heat-expand coefficient than each component.
研究了以Ｆｅ、α－Ａｌ２Ｏ３、莫来石为原料备的透气性金属－陶瓷复合材料烧结尺寸变化率，以及制品在连续升温条件下热膨胀系数的动态变化规律。
补充资料：烧结金属粉末压坯尺寸变化
烧结金属粉末压坯尺寸变化
dimensional changes of sintered metallic powder compacts
shoojle]一nshu fenmo yoP奄de ehieunb一onhua烧结金属粉末压坯的尺寸变化(d imensionalehanges of sintered metallie powder eomp-acts)按规定的压坯密度或成形压力压制金属粉末或金属粉末混合物，当压坯从模腔中脱出时，因弹性后效尺寸增大。按规定的条件(时间、温度曲线和气氛)进行烧结，压坯尺寸发生变化。这种尺寸变化按国际标准化组织标准1504492进行测定。控制和预测这种尺寸变化是生产工艺的一个重要方面。可借助于这些参数，精心设计压模，以制取高精度的零部件。 可采用精度大于。.oo25mm的千分尺或适宜的其他测量仪器测量模腔、压坯和烧结试样的尺寸，应精确到0 .0025mm。 压坯尺寸变化、烧结试样尺寸变化和总尺寸变化分别按式(1)、式(2)和式(3)求出: 一丝玩逃x100%(l)式中△d、为弹性后效(压坯对阴模);dG为压坯尺寸，mm;dD为模腔尺寸，mm。 △、一导\1。。%(2，式中△dGs为烧结尺寸变化(试样对压块);ds为烧结试样尺寸，mm。 △心一导火100%(3)式中△dsD为总尺寸变化(烧结试样对阴模)。 许多因素对于烧结金属粉末压坯的尺寸变化有影响，如粉末性能、压机和压模的情况、烧结条件等。 (李忠全)
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