It is justified by the observed results that non-metallic inclusion can act as the heterogeneous nuclei of nodular graphite in this paper.
提供了非金属夹杂物作为球状石墨非自发形核心的视觉证实。
Adding different alloy combination of RE, copper and titanium, then through gestation and nodulizing disposal, we got the fine texture of ferrite pearlite and spheroidal graphite.
通过在中硅耐热铸铁中添加不同组合的合金元素稀土、铜、钛使其合金化,经过孕育和球化处理,得到铁素体+珠光体+球状石墨的金相组织。
Spheroidal graphite can be observed in the region approaching surface of the smaller section size gray iron bars by continuous cast The experiment shows that spharical graphite may crystallize in commercial gray cast iron with suitable chemical composition under certain cooling rate This phenomenon can be explained by the mechanism of diffusion controlled growth of graphit
在较小截面的连铸灰铸铁型材表层，观察到具有球状石墨的金相组织；经过试验证明，在一定冷却条件下，未经处理过的灰口铁液也可能析出球状石墨。
The fracture behaviour of cast irons with graphite irregularity S=0 and spheroidal graphite iron under three different stress modes was investigated.
试验发现：当裂纹遇到与其平行的片状石墨时，裂纹将在石墨内部以（０００１）面之间的解理而扩展；当裂纹遇到与其垂直的片状石墨时，裂纹将沿石墨／基体界面处扩展，也即界面的脱粘；当裂纹遇到球状石墨时，裂纹上要在二次石墨中前进。
The best nucleus of spherical graphite should be some non-metallic impurities or some bubbles formed by surface active elements,which have low boiling points.
通过对低碳球铁中球状石墨核心的分析和研究,探讨了核心形状及其物质构成对低碳球铁中石墨球化的影响规律。
Most nuclei with spherical or near spherical shape can grow up into spherical graphite, while nuclei with no regular shape can hardly grow.
研究了低碳球铁中球状石墨的内部结构及核心形状 ,探讨了核心形状对石墨球化的影响规律。
By modifying the iron melt with RE,K,Na,a sort of vermicular graphite cast iron which has vermicular graphite + spheroidal graphite and ferrite matrix was obtained and used as the material of moulds for glass appliance production.
通过采用RE、K、Na对铁液进行变质处理,获得蠕虫状+球状石墨和铁素体基体的蠕墨铸铁,用作玻璃模具材料。