Three basic ways to restrain the abnormal grain growth were suggested such as pretreatment of the starting fine powder, improving the sintering agents and adding other hard material powders.
举例说明了对原料金刚石微粉进行前处理，选择合适的烧结助剂，以及在原料金刚石微粉中添加少量其它物质，是抑制金刚石异常粒成长的三种基本方法。
Another is that the hard phase and the soft phase both have microstructure with crystal grain of fine and homogeneous, and the size of crystal grain had better within magnitude of nanometer.
二是硬磁相和软磁相均要求有晶粒细小且分布均匀的显微结构特别是软磁相晶粒尺寸尽可能达到纳米尺寸。
The gross section fine grain material can be obtained by radial forging. One heat forging from ingot to finished products of high alloy with hard deformation can be realized.
径向锻造可获得全截面细晶材料，并实现高合金难变形材料由锭到材的一火次锻造。
Changning jade, a new member of jade family, occurs in Changning county, Hunan and mineralogically it consists of diopside, very fine in grain size, homogeneous in texture, bright and hard.
常宁玉是产于湖南省常宁县的一种玉石新品种，属透辉石质玉。
Changning jade, a new member of jade family, occurs in Changning county, Hunan and mineralogically it consists of diopside, very fine in grain size, homogeneous in texture, bright and hard.
常宁玉是产于湖南省常宁县的一种玉石新品种，属透辉石质玉。
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