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A Casting Process of High Strength and High Toughness Ductile Iron

A technology of ductile cast iron and casting process, which is applied in the field of casting process of high-strength and high-toughness ductile iron, can solve the problems of complex casting process, high production cost, low molding efficiency, etc. drop, good effect

Active Publication Date: 2021-07-20
新沂永新机械配件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The Chinese patent application number is CN201810026566.X, which discloses a production method of strong ductile ductile iron, the production cost is relatively high, the casting process is complicated, and the molding efficiency is low

Method used

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  • A Casting Process of High Strength and High Toughness Ductile Iron
  • A Casting Process of High Strength and High Toughness Ductile Iron
  • A Casting Process of High Strength and High Toughness Ductile Iron

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Preliminary preparation: conduct a comprehensive and detailed inspection of all equipment to confirm that there is no abnormality in the equipment;

[0046] Raw material preparation: the raw materials include pig iron, steel scrap, recycled material, pretreatment agent, Sb, carburizer, nodulizer, inoculant, and the inoculant includes inoculant in the bag and iron inoculant;

[0047] Wherein, the pretreatment agent is composed of the following components in terms of mass fraction: Si62%, Zr5%, Al5%, Ca1.5%, and the balance is Fe; the carburizer is composed of The following components are composed: C99.5%, the balance is S; the nodulizer, by mass fraction, is composed of the following components: Si45%, Mg6%, Ca1.2%, Re1.0%, Al1. 0%, Ba0.2%, Pb0.2%, Cu0.1%, Ni0.1%, the balance is Fe, the Re includes Ce, Nd, Y, and the Ce:Nd:Y=2:1: 1. The inoculant in the bag is composed of the following components by mass fraction: Si75%, Ca1.0%, Al1%, Ba2.5%, and the balance is Fe; the ...

Embodiment 2

[0055] Preliminary preparation: conduct a comprehensive and detailed inspection of all equipment to confirm that there is no abnormality in the equipment;

[0056] Raw material preparation: the raw materials include pig iron, steel scrap, recycled material, pretreatment agent, Sb, carburizer, nodulizer, inoculant, and the inoculant includes inoculant in the bag and iron inoculant;

[0057] Wherein, the pretreatment agent, in terms of mass fraction, is composed of the following components: Si65%, Zr5%, Al5%, Ca1.0%, and the balance is Fe; the carburizer, in mass fraction, consists of The following components are composed: C99.5%, the balance is S; the nodulizer, by mass fraction, is composed of the following components: Si45%, Mg5%, Ca1.0%, Re1, Al1.0%, Ba0.3%, Pb0.25%, Cu0.2%, Ni0.1%, the balance is Fe, the Re includes Ce, Nd, Y, and the Ce:Nd:Y=2:1:1; The inoculant in the bag, by mass fraction, is composed of the following components: Si72%, Ca1.0%, Al1%, Ba2.0%, and the bal...

Embodiment 3

[0065] Preliminary preparation: conduct a comprehensive and detailed inspection of all equipment to confirm that there is no abnormality in the equipment;

[0066] Raw material preparation: the raw materials include pig iron, steel scrap, recycled material, pretreatment agent, Sb, carburizer, nodulizer, inoculant, and the inoculant includes inoculant in the bag and iron inoculant;

[0067] Wherein, the pretreatment agent is composed of the following components in terms of mass fraction: Si62%, Zr5%, Al3%, Ca1.5%, and the balance is Fe; the carburizer is composed of The following components are composed: C99.5%, the balance is S; the nodulizer, by mass fraction, is composed of the following components: Si44%, Mg6%, Ca1%, Re1%, Al0.5%, Ba0 .2%, Pb0.2%, Cu0.1%, Ni0.1%, the balance is Fe, the Re includes Ce, Nd, Y, the Ce:Nd:Y=2:1:1; The inoculant in the bag is composed of the following components by mass fraction: Si74%, Ca2%, Al1%, Ba2.0%, and the balance is Fe; the iron inocul...

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Abstract

A casting process of high-strength and high-toughness nodular cast iron, comprising the following steps: pre-preparation, raw material preparation, preparation of raw iron liquid, spheroidization, inoculation treatment in a bag, tapping inoculation, pouring, boxing, and qualification inspection. The above-mentioned raw materials include pig iron, steel scrap, furnace charge, pretreatment agent, Sb, recarburizer, nodulizer, inoculant, and the inoculant includes inoculant in the bag and iron inoculant. The casting process of the high-strength and high-toughness nodular cast iron described in the present invention has a simple process, and the microstructure and properties of the nodular cast iron are remarkably improved by the pretreatment agent. It plays a good role in the treatment process, so that the obtained ductile iron has uniform, good structure and stability, excellent mechanical properties, high strength, high toughness, and broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of casting technology, and in particular relates to a casting technology of high-strength and high-toughness nodular cast iron. Background technique [0002] Ductile iron castings are used in various fields of our country's national economy, among which the application ratio of cast pipes and pipe fittings is about 33.6%, automobile castings account for 32%, others such as machine tools, agricultural machinery, construction machinery, construction, metallurgy, mining , The energy industry sector accounts for about 35%. [0003] The most important application of ductile iron is in ductile iron pipe and machinery manufacturing. With the acceleration of urbanization in my country, large-scale construction of urban infrastructure, and the excellent quality of ductile iron materials, ductile iron pipes have replaced gray cast iron pipes in many new projects, becoming high-quality engineering construction materia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C1/10C22C33/10C22C37/04C22C37/10
CPCC21C1/105C22C33/10C22C37/04C22C37/10Y02P10/20
Inventor 朱煜明
Owner 新沂永新机械配件有限公司
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