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A kind of Si-free rare earth magnesium alloy nodulizer and its preparation method and application

A technology of nodularizing agent and rare earth magnesium, which is applied in the field of nodular cast iron, can solve the problems of poor anti-decay ability of ordinary nodulizers and high raw material requirements, and achieve strong anti-spheroidizing anti-decay ability, reduce Si content, and improve anti-decay ability Effect

Active Publication Date: 2021-04-16
JIANGSU YAFENG ALLOY MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problems that more Si is introduced in the spheroidizing process, the anti-recession ability of ordinary spheroidizing agents is poor, and the requirements for raw materials are high, the invention provides a rare earth magnesium alloy spheroidizing agent without Si and its preparation method and Application, the adopted technical scheme is as follows:

Method used

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  • A kind of Si-free rare earth magnesium alloy nodulizer and its preparation method and application
  • A kind of Si-free rare earth magnesium alloy nodulizer and its preparation method and application
  • A kind of Si-free rare earth magnesium alloy nodulizer and its preparation method and application

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Embodiment 1

[0043] This embodiment provides a rare earth magnesium alloy nodulizer without Si and its preparation method: the mass percent of each constituent element in the rare earth magnesium alloy nodulizer without Si is: Al 1%, RE 8%, Ca 3%, Sb 1%, Bi 1%, the balance is Mg, wherein: RE is Ce.

[0044] The preparation method of this nodulizer is carried out according to the following steps:

[0045] 1) Using pure magnesium, pure aluminum, Mg-RE master alloy and Mg-Ca master alloy as raw materials, prepare materials according to the mass percentage requirements of the above-mentioned constituent elements, and dry each block raw material at 200°C for at least 3 hours;

[0046] 2) Preheat the melting crucible (made of low carbon steel) to 500°C, then add pure aluminum and pure magnesium and raise the temperature to 720°C until the pure aluminum and pure magnesium melt;

[0047] 3) Then add Mg-RE master alloy and Mg-Ca master alloy and raise the temperature to 750°C, keep warm for 15min,...

Embodiment 2

[0051] This embodiment provides a kind of Si-free rare earth magnesium alloy spheroidizer and its preparation method: the mass percent of each constituent element in the Si-free rare earth magnesium alloy spheroidizer is: Al 3%, RE 10%, Ca 5%, Sb 3%, Bi 3%, the balance is Mg, wherein: RE is Ce.

[0052] The preparation method of this nodulizer is carried out according to the following steps:

[0053] 1) Using pure magnesium, pure aluminum, Mg-RE master alloy and Mg-Ca master alloy as raw materials, prepare materials according to the mass percentage requirements of the above-mentioned constituent elements, and dry each block raw material at 200°C for at least 3 hours;

[0054] 2) Preheat the melting crucible (made of low-carbon steel) to 500°C, then add pure aluminum and pure magnesium and raise the temperature to 730°C until the pure aluminum and pure magnesium melt;

[0055] 3) Then add Mg-RE master alloy and Mg-Ca master alloy and heat up to 760°C, keep warm for 20min, then...

Embodiment 3

[0059] This embodiment provides a rare earth magnesium alloy nodulizer without Si and its preparation method: the mass percent of each constituent element in the rare earth magnesium alloy nodulizer without Si is: Al 3%, RE 9%, Ca 3%, Sb 2%, Bi 1%, the balance is Mg, wherein: RE is Ce.

[0060] The preparation method of this nodulizer is carried out according to the following steps:

[0061] 1) Using pure magnesium, pure aluminum, Mg-RE master alloy and Mg-Ca master alloy as raw materials, prepare materials according to the mass percentage requirements of the above-mentioned constituent elements, and dry each block raw material at 200°C for at least 3 hours;

[0062] 2) Preheat the melting crucible (made of low carbon steel) to 500°C, then add pure aluminum and pure magnesium and raise the temperature to 725°C until the pure aluminum and pure magnesium melt;

[0063] 3) Then add Mg-RE master alloy and Mg-Ca master alloy and heat up to 755°C, keep warm for 18min, then stir for...

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Abstract

The invention discloses a rare earth magnesium alloy nodulizer not containing Si, a preparation method and application thereof, and belongs to the technical field of ball milled cast iron. The mass percentages of the constituent elements in the Si-free rare earth magnesium alloy nodulizer are: Al 1%-3%, RE 8%-10%, Ca 3%-5%, Sb 1%-3%, Bi 1 %~3%, the balance is Mg, wherein: RE is any one or more of Ce, La and Y. The invention also provides a preparation method and application of the Si-free rare earth magnesium alloy nodulizer. The nodulizer of the present invention does not contain Si, and when used in cast iron, it can avoid introducing a large amount of silicon during nodularization treatment, thereby reducing the requirement for the silicon content of the original molten iron, thereby realizing the production of nodular cast iron castings, ensuring the quality of castings, and reducing production costs.

Description

technical field [0001] The invention relates to a rare earth magnesium alloy nodulizer not containing Si, a preparation method and application thereof, and belongs to the technical field of nodular cast iron. Background technique [0002] Ferrite-based ductile iron has excellent comprehensive mechanical properties, especially excellent low-temperature performance, and has been widely used in nuclear power, wind power, transportation and other fields. In order to ensure the low-temperature performance of ductile iron, it is generally required to obtain all the ferrite matrix under as-cast conditions, and as the silicon content decreases, the low-temperature impact of ductile iron increases. Therefore, in order to ensure the low-temperature performance of ferrite matrix ductile iron, the principle of high carbon and low silicon is adopted in the selection of chemical composition. However, the thick and large section ductile iron nodularizers used at this stage contain a relat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C1/10
CPCC21C1/10C21C1/105Y02P10/20
Inventor 冯义成王丽萍陈亮于明基赵思聪郭二军姜文勇
Owner JIANGSU YAFENG ALLOY MATERIAL
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