公开(公告)号：US4099994A

公开(公告)日：1978-07-11

申请号：US814800

申请日：1977-07-11

申请人： Katsuya Ikawa ,  Yuichi Tanaka

发明人： Katsuya Ikawa ,  Yuichi Tanaka

IPC分类号： C21D5/00

CPC分类号： C21D5/00

摘要： A ductile cast iron having a high tensile strength as well as a high elongation due to its matrix structure of finely mixed ferrite and pearlite grains obtained by the heat treatment. The material is pearlitic ductile cast iron and may be of ordinary ductile cast iron composition with the only exception that the manganese content being substantially less than 1%.A method of heat treatment for obtaining such a ductile cast iron, which is composed substantially of heating the material rapidly to form ferrite, austenite and graphite co-existing structure, and air cooling the same to change that structure into the above mentioned matrix structure.

摘要翻译： 由于通过热处理获得的精细混合的铁素体和珠光体颗粒的基体结构，具有高拉伸强度和高伸长率的球墨铸铁。 该材料是珠光体球墨铸铁，并且可以是普通的球墨铸铁组合物，唯一的例外是锰含量基本上小于1％。

公开(公告)号：US4096002A

公开(公告)日：1978-06-20

申请号：US583681

申请日：1975-06-04

申请人： Katsuya Ikawa ,  Yuichi Tanaka

发明人： Katsuya Ikawa ,  Yuichi Tanaka

IPC分类号： C22C37/04 ,  C21D5/00 ,  C21D8/00

CPC分类号： C21D8/005 ,  C21D5/00 ,  Y10S420/902

摘要： A spheroidal graphite cast iron containing some carbide stabilizing elements to have the maximum strain rate sensitivity factor of more than 0.3 and having very refined grain matrix structure, so that having an improved toughness at room temperature and having a matrix which is composed of fine austenite and fine ferrite grains and superplastic properties at the temperature between the eutectoid transformation temperature range and 50.degree. C higher than that temperature range; and the method of heat treatment to obtain the said spheroidal graphite cast iron.

摘要翻译： 一种含有一些碳化物稳定元素的球墨铸铁具有大于0.3的最大应变率灵敏度因子并且具有非常精细的晶粒矩阵结构，使得在室温下具有改善的韧性并具有由细奥氏体和 细晶铁素体晶粒和超塑性特性在共析转变温度范围内温度比该温度范围高50℃; 和热处理方法获得所述球墨铸铁。