發(fā)布時(shí)間：2019-06-08 06:54

【摘要】：球墨鑄鐵中石墨的球化機(jī)理至今仍沒(méi)有統(tǒng)一定論,其中表面能理論、缺陷生長(zhǎng)理論、星型模型的影響較大、認(rèn)可度較高,而圓周生長(zhǎng)理論、石墨烯裝配理論在國(guó)內(nèi)則鮮有提及;它們的一大分歧在于是否強(qiáng)調(diào)c向擇優(yōu)生長(zhǎng),據(jù)此將其歸類并展開(kāi)深入、詳細(xì)的評(píng)析,首先考察它們對(duì)石墨"自然"存在形態(tài)為球狀的解讀,進(jìn)而涉及到硫、氧、鎂等元素的作用機(jī)理,以及石墨的演變過(guò)程;認(rèn)為Double提出的石墨烯裝配理論是更為可靠的球化機(jī)理,星形生長(zhǎng)模型相對(duì)復(fù)雜,盡管在解釋爆炸狀形態(tài)方面具有優(yōu)勢(shì),但關(guān)鍵證據(jù)方面依然存有爭(zhēng)議,因而尚不具備充分的說(shuō)服力。
[Abstract]:Up to now, the nodularization mechanism of graphite in nodular cast iron has not been uniformly determined, among which the surface energy theory, defect growth theory and star model have great influence and high recognition, while the circumferential growth theory and graphene assembly theory are rarely mentioned in China. One of their major differences is whether to emphasize the preferred growth of c, according to which it is classified and evaluated in depth, first of all, to investigate their interpretation of the globular form of graphite "natural", and then to involve sulfur and oxygen. The action mechanism of magnesium and other elements, as well as the evolution process of graphite; It is considered that the graphene assembly theory proposed by Double is a more reliable spheroidizing mechanism, and the star growth model is relatively complex. Although it has advantages in explaining explosive morphology, the key evidence is still controversial. As a result, it is not yet fully persuasive.
【作者單位】： 山東大學(xué) 材料液固結(jié)構(gòu)演變與加工教育部重點(diǎn)實(shí)驗(yàn)室;
【分類號(hào)】：TG255
，

本文編號(hào)：2495089