论文部分内容阅读
我厂在没有本溪生铁和优质焦炭,没有大容积高温热处理炉的条件下,因地制宜地利用本省地方生铁(含磷量0.10～0.15％),采用包外孕育与低温石墨化退火等工艺,生产出了优质高韧性球墨铸铁,使图纸要求的QT40—10球铁实际达到新国标QT42—10和QT40—17,冲击值高达11.2和20.7kg/cm~2,延伸率高达16～20％,并解决了球铁大件的热处理难关,可在低温煤炉中批量退火,工效高,且热处理成本比原用电炉高
I plant in the absence of Benxi pig iron and high-quality coke, there is no large-volume high-temperature heat treatment furnace conditions, local conditions to use the local pig iron (0.10 to 0.15% phosphorus content), using the package outside the birth and low temperature graphitization annealing process to produce High-quality and ductile ductile iron, so that the drawings required QT40-10 ductile iron actually reach the new national standard QT42-10 and QT40-17, the impact value of up to 11.2 and 20.7kg / cm ~ 2, elongation of up to 16 to 20%, and to solve Ductile iron big heat treatment difficulties, batch annealing in low temperature coal furnace, high efficiency, and heat treatment costs than the original high furnace