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一、是非题: 1、（×） 2、（×） 3、（×）4、（×） 5、（×）二、填充题: 1、硼碳化合物、磷共晶 2、有利 3、减小 4、石墨形状 5、变化趋向 三、问答题: 1、答:（1）加强孕育处理（2）避免不适当的过热温度（3）适当提高碳当量（4）加入适量的Cr、Sb、Sn等元素。 2、答:主要应减少石墨的切口应力,其次是减少石墨数量,避免珠光体粒化,减少铁素体含量,细化珠光体。磷共晶及其复合物组成强有力的纲目。
First, the non-question: 1, (×) 2, (×) 3, (×) 4, (×) 5, (×) Second, the filling questions: 1, boron carbon compounds, phosphorus eutectic 2, Small 4, graphite shape 5, the trend of change 3, Q & A: 1, A: (1) to strengthen the breeding process (2) to avoid inappropriate temperature overheating (3) appropriate to raise the carbon equivalent (4) Sn and other elements. 2, A: Mainly reduce the incision stress of graphite, followed by reducing the amount of graphite, to avoid pearlite granulation, reduce ferrite content, refine pearlite. Phosphorus eutectic and its complex composition of a powerful outline.