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1.发明申请公开(公告)号：US20130105047A1
公开(公告)日：2013-05-02
申请号：US13805310
申请日：2011-06-17
申请人： Franco Zanardi
发明人： Franco Zanardi
IPC分类号： C21D5/00
摘要： A method for manufacturing mechanical components made of spheroidal cast iron, comprising the following steps: providing a casting of a mechanical cast iron component with a percentage of pearlitic structure greater than 70%, having a carbon content comprised between 2.5% and 4.0%, a silicon content comprised between 1.5% and 3.5%, a manganese content comprised between 0.6% and 1.2%, a molybdenum content comprised between 0% and 1%, and a chromium content comprised between 0% and 0.5%; bringing the cast iron casting with a percentage of pearlitic structure greater than 70% to a temperature that is higher than the upper austenitization temperature (Ac3) for the time required to obtain a fully austenitic structure; performing a thermal treatment for interrupted quenching in a salt bath, comprising a step of cooling the mechanical components in a salt bath at a cooling rate that is higher than the critical rate and an isothermal holding step at a temperature comprised between 250° C. and 320° C. for a time comprised between 10 minutes and 60 minutes in order to obtain a matrix comprising metastable unsaturated austenite in a percentage comprised between 40% and 90% of the total.
摘要翻译： 一种制造由球墨铸铁制成的机械部件的方法，包括以下步骤：提供具有大于70％的碳含量的珠光体结构百分比的机械铸铁组分的铸造，其中碳含量在2.5％至4.0％之间， 硅含量在1.5％至3.5％之间，锰含量在0.6％至1.2％之间，钼含量在0％至1％之间，铬含量在0％至0.5％之间; 使一定百分比的珠光体结构大于70％的铸铁铸件达到高于上奥氏体化温度（Ac3）的温度达到完全奥氏体结构所需的时间; 在盐浴中进行中断淬火的热处理，包括以高于临界速率的冷却速率和在等温保持步骤的温度下在盐浴中冷却机械组分的步骤，所述温度在250℃和 320℃，持续10分钟至60分钟之间的时间，以便以包含在总量的40％至90％之间的百分比获得包含亚稳态不饱和奥氏体的基体。
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公开(公告)号：US08328965B2
公开(公告)日：2012-12-11
申请号：US12307237
申请日：2007-06-18
CPC分类号： C21D5/00 , C21D1/185 , C21D1/20 , C21D1/46 , C21D5/02 , C21D2211/005 , C21D2211/009 , C22C37/04 , C22C37/10
摘要： A method for manufacturing mechanical components made of spheroidal cast iron, comprising the following steps: —providing a casting of a mechanical component made of cast iron having a structure which is at least partially ferritic and has a carbon content ranging from 2.5% to 4.0% and a silicon content ranging from 2.0% to 3.5%; —bringing the cast iron casting having an at least partially ferritic structure to a temperature for partial austenitizing which is higher than the lower limit austenitizing temperature (Ac1) and lower than the upper limit austenitizing temperature (Ac3) for a time required to obtain an at least partially austenitic structure; —performing a thermal treatment for isothermal hardening at a temperature ranging from 250° C. to 400° C. in order to obtain a matrix which has at least partially a pearlitic-ferritic or perferritic structure.
摘要翻译： 一种用于制造由球墨铸铁制成的机械部件的方法，包括以下步骤：提供具有至少部分铁素体且碳含量为2.5％至4.0％的结构的由铸铁制成的机械部件的铸件， 硅含量范围为2.0％〜3.5％; 将具有至少部分铁素体结构的铸铁铸件压制成高于下限奥氏体化温度（Ac1）并低于上限奥氏体化温度（Ac3）的部分奥氏体化温度达到所需时间 最小部分奥氏体结构; - 在250℃至400℃的温度下进行等温硬化的热处理，以获得至少部分具有珠光体 - 铁素体或非铁酸盐结构的基体。
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公开(公告)号：US20090320971A1
公开(公告)日：2009-12-31
申请号：US12307237
申请日：2007-06-18
CPC分类号： C21D5/00 , C21D1/185 , C21D1/20 , C21D1/46 , C21D5/02 , C21D2211/005 , C21D2211/009 , C22C37/04 , C22C37/10
摘要： A method for manufacturing mechanical components made of spheroidal cast iron, comprising the following steps: -providing a casting of a mechanical component made of cast iron having a structure which is at least partially ferritic and has a carbon content ranging from 2.5% to 4.0% and a silicon content ranging from 2.0% to 3.5%; -bringing the cast iron casting having an at least partially ferritic structure to a temperature for partial austenitizing which is higher than the lower limit austenitizing temperature (Ac1) and lower than the upper limit austenitizing temperature (Ac3) for a time required to obtain an at least partially austenitic structure; -performing a thermal treatment for isothermal hardening at a temperature ranging from 250° C. to 400° C. in order to obtain a matrix which has at least partially a pearlitic-ferritic or perferritic structure.
摘要翻译： 一种用于制造由球墨铸铁制成的机械部件的方法，包括以下步骤：提供具有至少部分铁素体且碳含量为2.5％至4.0％的结构的由铸铁制成的机械部件的铸件， 硅含量范围为2.0％〜3.5％; 将具有至少部分铁素体结构的铸铁铸件压制成高于下限奥氏体化温度（Ac1）并低于上限奥氏体化温度（Ac3）的部分奥氏体化温度达到所需时间 最小部分奥氏体结构; - 在250℃至400℃的温度下进行等温硬化的热处理，以获得至少部分具有珠光体 - 铁素体或非铁酸盐结构的基体。
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