论文部分内容阅读
获得高强度、高韧性、高硬度的墨球铸铁是人们一直所追求的,往往是达到了高强度、高硬度而韧性又是显著的下降。本文即是试验了如何达到高强度、高韧性又高硬度的球墨铸铁。一、试验条件1.熔化设备熔化在φ700毫米外热式热风酸性冲天炉中进行,为对流—辐射式热风炉,热风温度300～350℃。球铁批料350公斤、层焦50公斤、石灰石20公斤,每隔5批加一批接力焦。焦炭灰分小于12%,硫0.6%,水份小于4%,挥发分1.5%。
Obtained high strength, high toughness, high hardness of the ball of cast iron people have been pursuing, often reached high strength, high hardness and toughness is a significant decline. This article is to test how to achieve high strength, high toughness and high hardness ductile iron. First, the test conditions Melting equipment melting φ700 mm hot hot air outside the cupola for convection - radiant hot blast stove, hot air temperature 300 ~ 350 ℃. Nodular iron batch 350 kg, layer coke 50 kg, limestone 20 kg, every 5 batches plus a number of relay coke. Coke ash is less than 12%, sulfur 0.6%, moisture less than 4%, volatile matter 1.5%.