公开(公告)号：US20200283859A1

公开(公告)日：2020-09-10

申请号：US16330104

申请日：2017-08-31

申请人： TOHOKU UNIVERSITY ,  KABUSHIKI-KAISHA FACT

发明人： Masayuki ITAMURA ,  Haruki ITOFUJI ,  Mitsuru ADACHI

IPC分类号： C21C1/10 ,  B22D27/20 ,  B22D1/00 ,  C22C37/04 ,  C22C33/10 ,  B22D27/04

摘要： The present invention provides a casting method and cast product of spherical graphite cast iron, in which, even with a small modulus, there is no chill, the spherical graphite in the tissue is further made ultrafine, the dispersion of the particle diameter is small, and the number of the particles is several times that of the conventional one in the as cast state where heat treatment is not carried out.A casting method of a spherical graphite cast iron comprised from, a melting process, a spheroidizing treatment process, an inoculation process, and a casting process, in which the original molten metal after the inoculation process is poured and filled up to a product space through a gate of a metal mold; wherein the original molten metal before being filled up to the product space is controlled to a semi-solidification temperature range. An amount of nitrogen at the time of melting of the (cast iron?) is controlled to 0.9 ppm (mass) or less. The casting process is carried out by controlling the pouring temperature and the heat removal amount from the molten metal so that the temperature of the raw material when passing through the gate becomes a substantially constant temperature between an eutectic temperature and a liquidus temperature.

公开(公告)号：US20220275467A1

公开(公告)日：2022-09-01

申请号：US17664429

申请日：2022-05-23

申请人： TOHOKU UNIVERSITY ,  KABUSHIKI-KAISHA FACT

发明人： Masayuki ITAMURA ,  Haruki ITOFUJI ,  Mitsuru ADACHI

IPC分类号： C21C1/10 ,  B22D1/00 ,  B22D27/04 ,  B22D27/20 ,  C22C33/10 ,  C22C37/04

摘要： The present invention provides a casting method and cast product of spherical graphite cast iron, in which, even with a small modulus, there is no chill, the spherical graphite in the tissue is further made ultrafine, the dispersion of the particle diameter is small, and the number of the particles is several times that of the conventional one in the as cast state where heat treatment is not carried out.
A casting method of a spherical graphite cast iron comprised from, a melting process, a spheroidizing treatment process, an inoculation process, and a casting process, in which the original molten metal after the inoculation process is poured and filled up to a product space through a gate of a metal mold; wherein the original molten metal before being filled up to the product space is controlled to a semi-solidification temperature range. An amount of nitrogen at the time of melting of the (cast iron?) is controlled to 0.9 ppm (mass) or less. The casting process is carried out by controlling the pouring temperature and the heat removal amount from the molten metal so that the temperature of the raw material when passing through the gate becomes a substantially constant temperature between an eutectic temperature and a liquidus temperature.

公开(公告)号：US20160228946A1

公开(公告)日：2016-08-11

申请号：US15022119

申请日：2014-10-09

申请人： TOHOKU UNIVERSITY

发明人： Masayuki ITAMURA ,  Kouichi ANZAI

IPC分类号： B22D18/02 ,  B22D27/04 ,  B22D19/00 ,  B22D17/00

CPC分类号： B22D18/02 ,  B22D17/007 ,  B22D17/229 ,  B22D19/00 ,  B22D19/04 ,  B22D27/04 ,  B22D27/11

摘要： An excellent cast and forged product that is superior in mechanical properties and has a microstructure and which may not only be a thin but also be a thick product can be made without using complicated process steps or equipment. A semisolid casting and forging method is provided in which a metal melt is teemed so that it is supercooled into a lower die in a press so controlled that the metal melt has a rate of solidification as desired, thereby preparing a semisolid slurry; an upper die is brought into contact with the semisolid slurry; and thereafter at least one of the upper and lower dies is moved relatively towards the other at a rate of movement between 0.1 and 1.5 m/sec, thereby compressing the semisolid slurry to mold it into a product. The semisolid slurry preferably has crystal grains of a grain size of 50 μm or less.

摘要翻译： 可以在不使用复杂的工艺步骤或设备的情况下，制造机械性能优异且具有显微组织的优异的铸造和锻造产品，其不仅可以是薄的，而且可以是厚的产品。 提供了一种半固态铸造和锻造方法，其中金属熔体被浇铸，使得其在压力机中被过冷却成下模，以使金属熔体具有所需的凝固速率，从而制备半固体浆料; 使上模与半固体浆料接触; 然后上下模具中的至少一个以0.1和1.5m / sec之间的移动速度相对移动，从而压缩半固体浆料以将其模塑成产品。 半固体浆料优选具有50μm以下的晶粒尺寸。

公开(公告)号：US20200071780A1

公开(公告)日：2020-03-05

申请号：US16498192

申请日：2018-03-29

申请人： I2C CO., LTD. ,  TOHOKU UNIVERSITY

发明人： Haruki ITOFUJI ,  Masayuki ITAMURA

IPC分类号： C21C1/10

摘要： The present invention provides a die-cast product producing method and a spheroidizing agent of a spherical graphite cast iron with ultrafine spherical graphite by simple method and good reproducibility.The present invention provides a sand mold producing method and a spheroidizing agent capable of producing an ultrafine spherical graphite cast iron with good reproducibility even in a sand mold thin walled spherical graphite cast iron, which has solidification cooling conditions equivalent to those of a metal mold.The present invention provides a producing method of a die-cast product of a spherical graphite cast iron using a spheroidizing agent, in which a C amount is 0.5 mass % or more, a total nitrogen amount N is 150 ppm (by mass) or less, and a nitrogen amount generated during melting is 15 ppm (by mass) or less, in a producing method of a sand mold cast product of a thin walled spherical graphite cast iron having a melting process, a spheroidizing process, an inoculation process, and a casting process.

公开(公告)号：US20220106652A1

公开(公告)日：2022-04-07

申请号：US17548542

申请日：2021-12-12

申请人： I2C CO., LTD ,  TOHOKU UNIVERSITY

发明人： Haruki ITOFUJI ,  Masayuki ITAMURA

IPC分类号： C21C1/10

摘要： The present invention provides a die-cast product producing method and a spheroidizing agent of a spherical graphite cast iron with ultrafine spherical graphite by simple method and good reproducibility.
The present invention provides a sand mold producing method and a spheroidizing agent capable of producing an ultrafine spherical graphite cast iron with good reproducibility even in a sand mold thin walled spherical graphite cast iron, which has solidification cooling conditions equivalent to those of a metal mold.
The present invention provides a producing method of a die-cast product of a spherical graphite cast iron using a spheroidizing agent, in which a C amount is 0.5 mass % or more, a total nitrogen amount N is 150 ppm (by mass) or less, and a nitrogen amount generated during melting is 15 ppm (by mass) or less, in a producing method of a sand mold cast product of a thin walled spherical graphite cast iron having a melting process, a spheroidizing process, an inoculation process, and a casting process.

公开(公告)号：US20180371561A1

公开(公告)日：2018-12-27

申请号：US15744454

申请日：2016-07-15

申请人： I2C CO., LTD. ,  TOHOKU UNIVERSITY

发明人： Haruki ITOFUJI ,  Masayuki ITAMURA ,  Koichi ANZAI ,  Kazuyoshi YAMAGUCHI

IPC分类号： C21C1/10 ,  B22D27/20 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00

摘要： For the purpose of providing a method of die cast product of spheroidal graphite cast iron and a die cast product of spheroidal graphite cast iron having the number of spherical graphites of 3000/mm2 or more in an as cast state, there is disclosed a method of die cast product of ultrafine spheroidal graphite cast iron, including the steps of: a melting step of heating and melting raw materials made of cast iron to obtain source melting metal; a spheroidizing treatment step in which a spheroidizing treatment is performed; an inoculation step of inoculating; and a casting step of casting in a die mold. The amount of nitrogen is adjusted so that the amount of nitrogen generated in the time of melting becomes 0.9 ppm (mass) or less.

公开(公告)号：US20160250684A1

公开(公告)日：2016-09-01

申请号：US14684860

申请日：2015-04-13

申请人： TOHOKU UNIVERSITY

发明人： Masayuki ITAMURA ,  Kouichi ANZAI

IPC分类号： B22D25/02 ,  B22D21/00 ,  B22D17/20 ,  B22D17/22 ,  B22D17/00 ,  B22D17/10

CPC分类号： B22D25/02 ,  B22D17/002 ,  B22D17/007 ,  B22D17/10 ,  B22D17/20 ,  B22D17/203 ,  B22D17/22 ,  B22D17/2236 ,  B22D17/30 ,  B22D21/007 ,  Y10S164/90

摘要： A die casting method and apparatus are provided, thereby making it possible to produce a thin diecast product that has hitherto been considered impossible to realize, and a diecast product is also provided. A semi-solidified metallic material is formed having particles in solid phase of a particle size less than 30 μm, and is thereupon injected into a die. A die casting machine has a sleeve into which a melt of metallic material is poured, and the semi-solidifying material there when it has a certain proportion of solid phase reached is injected into the die with a plunger to which pressure is applied. The melt of metallic material is poured into the sleeve so that the material occupies inside the sleeve at a proportion in vertical cross-sectional area of 30% or less. The particle size in this semi-solid material is held unvaried in a product as diecast.

摘要翻译： 提供了一种压铸方法和装置，从而可以生产迄今为止被认为是不可能实现的薄压铸产品，并且还提供了压铸产品。 形成半固化金属材料，其具有粒径小于30μm的固相颗粒，然后注入模具。 压铸机具有套管，金属材料的熔体被浇入该套筒中，并且当达到一定比例的固相时，半固化材料被注入到具有施加压力的柱塞的模具中。 将金属材料的熔体倒入套筒中，使得材料以垂直横截面积为30％或更小的比例占据套管内。 这种半固体材料中的粒度在压铸产品中不变。