According to stress of graphite austenite eutectic cell during solidification, the caues of chunky graphite of hot spot and some factors are analysed in this article.
本文从球墨铸铁石墨———奥氏体共晶团形成及长大过程中的应力出发 ,分析了大断面球铁热节处非球形石墨—碎块状石墨的形成原因及若干影响因素 ,提出了防止措施。
The nesnlts show that St will fiercely promote the formation of chunky graphite when more than 2.
１％时，强烈促进碎块状石墨的形成，防止碎块状石墨的关键是减少Ｓｉ，使球铁碳当量不超过共晶碳当量。
Presence of chunky graphite seems to be more of a problem in ferritic,high Si and austenitic ductile iron.
碎块状石墨(chunky graphite)是厚大断面球墨铸铁件常见的缺陷之一,尤其在铁素体球铁、高w(Si)量以及奥氏体球墨铸铁中较为严重,它会明显影响铸件的力学性能,应尽可能避免或控制。
This article examined the differences of microstructure and thermal conductivity properties between the high thermal conductivity carbon materials(high thermal conductivity graphite sheet、high thermal conductivity graphite block)that made from expanded graphite and the high thermal conductivity carbon material(high thermal conductivity graphite film)that made from mesophase pitch.
考察了以膨胀石墨为原料制备的高导热炭材料(高导热石墨块、高导热石墨片)与以中间相沥青为原料制备的高导热炭材料(高导热石墨膜)在微观结构及导热性能上的差异。
Through theoretical calculation, chilling ability of graphite block to iron castings was discussed.
从理论上探讨了石墨块对铸铁件的激冷能力。
It could guarantee the quality of battery and reduce the cost of raw material effectively when the ratio of acetylene black and graphite in soil form was 2∶1 or the ratio of electrolytic manganese dioxide(EMD) and natural manganese dioxide(NMD) was 2∶1.
当乙炔黑与土状石墨的比例为2∶1或电解二氧化锰(EMD)与天然二氧化锰(NMD)比例为2∶1时,既能保证电池质量,又能有效地降低原材料成本。