High-strength high-toughness ductile cast iron 600-10 and production method thereof

A nodular cast iron, production process technology, applied to nodular cast iron. It can solve the problems of harsh casting shape, large manpower and material resources and time, equipment space and equipment weight increase, etc.

Active Publication Date: 2014-10-29
DALIAN JINZHOU MAOLONG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional transmission housing production process is completed through many production processes such as alloy steel plate blanking, pipe cutting and patchwork welding, which consumes a lot of manpower, material resources and time, resulting in increased equipment cost, equipment space and equipment weight.
At present, the ductile iron process is mostly used to replace the steel structure welding process to solve the problem that the fluidity of molten steel is extremely harsh on the shape of the casting and it is not easy to inject products
However, traditional ductile iron has poor strength and toughness

Method used

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  • High-strength high-toughness ductile cast iron 600-10 and production method thereof
  • High-strength high-toughness ductile cast iron 600-10 and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The high-strength and high-toughness ductile iron 600-10 in Example 1 is made through the following steps:

[0036]S1: Batching process, the raw materials used include Q12 pig iron, recycled material, steel scrap, ferrosilicon, ferromanganese, nodulizer and inoculant, and the ratio is as follows: Q12 pig iron: 66%, recycled material: 16.3%, scrap steel: 14 %, ferrosilicon: 0.9%, ferromanganese: 1%, nodulizer: 1.76%, inoculant: 0.04%;

[0037] S2: Smelting process, weigh Q12 pig iron, returned material and steel scrap according to the ratio in S1; start the power supply of the intermediate frequency induction furnace, add Q12 pig iron when the furnace temperature rises to 400°C and heat it to Q12 melting point; then add scrap steel and returned material And raise the temperature to 1400°C; use the metal element furnace front spectrum analyzer to detect the metal composition in the furnace, add 0.9% ferrosilicon and 1% ferromanganese according to the test results, and con...

Embodiment 2

[0050] The high-strength and high-toughness ductile iron 600-10 in embodiment two is made through the following steps:

[0051] S1: Batching process, the raw materials used include Q12 pig iron, recycled material, steel scrap, ferrosilicon, ferromanganese, nodulizer and inoculant, and the ratio is as follows: Q12 pig iron: 65%, recycled material: 15.56%, scrap steel: 15.57 %, ferrosilicon: 0.87%, ferromanganese: 1%, nodulizer: 1.96%, inoculant: 0.04%;

[0052] S2: Smelting process, weigh Q12 pig iron, returned material and steel scrap according to the ratio in S1; start the power supply of the intermediate frequency induction furnace, add Q12 pig iron when the furnace temperature rises to 400°C and heat it to Q12 melting point; then add scrap steel and returned material And raise the temperature to 1400°C; use the metal element furnace front spectrum analyzer to detect the metal composition in the furnace, add 0.87% ferrosilicon and 1% ferromanganese according to the test resu...

Embodiment 3

[0065] The high-strength and high-toughness nodular cast iron 600-10 in embodiment three is made through the following steps:

[0066] S1: Batching process, the raw materials used include Q12 pig iron, recycled material, steel scrap, ferrosilicon, ferromanganese, nodulizer and inoculant, and the ratio is as follows: Q12 pig iron: 68%, recycled material: 17.05%, scrap steel: 11.06 %, ferrosilicon: 0.9%, ferromanganese: 1%, nodulizer: 1.95%, inoculant: 0.04%;

[0067] S2: Smelting process, weigh Q12 pig iron, returned material and steel scrap according to the ratio in S1; start the power supply of the intermediate frequency induction furnace, add Q12 pig iron when the furnace temperature rises to 400°C and heat it to Q12 melting point; then add scrap steel and returned material And raise the temperature to 1400°C; use the metal element furnace front spectrum analyzer to detect the metal composition in the furnace, add 0.9% ferrosilicon and 1% ferromanganese according to the test...

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Abstract

The invention discloses a high-strength high-toughness ductile cast iron 600-10 and belongs to the technical field of cast iron metallurgy. The high-strength high-toughness ductile cast iron 600-10 comprises the following elements in percentages by mass: 3.48%-3.7% of C, 2.5%-2.7% of Si, 0.7%-1.0% of Mn, 0.019%-0.04% of P, 0.009%-0.02% of S, 0.054%-0.0648% of the sum of the rare earth elements, 0.04%-0.05% of Mg and the balance of Fe and unavoidable trace elements. The invention also discloses a production method of the high-strength high-toughness ductile cast iron 600-10. The high-strength high-toughness ductile cast iron 600-10 disclosed by the invention has the advantages of high strength and good toughness, the high-strength high-toughness ductile cast iron 600-10 is easily shaped and has other characteristics and the casting process is simple.

Description

technical field [0001] The invention relates to the technical field of cast iron metallurgy, in particular to nodular cast iron. Background technique [0002] Ductile cast iron is spheroidized graphite obtained through spheroidization and inoculation treatment, which effectively improves the mechanical properties of cast iron, especially improves plasticity and toughness, thereby obtaining higher strength than carbon steel. Ductile cast iron is a high-strength cast iron material developed in the 1950s. Its comprehensive performance is close to that of steel. It is based on its excellent performance that it has been successfully used to cast some complex stress, strength, toughness, and wear resistance. Parts with high performance requirements. [0003] The traditional transmission housing production process is completed through many production processes such as alloy steel plate blanking, pipe cutting and patchwork welding, which consumes a lot of manpower, material resourc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C33/08C21C1/10
Inventor 王振诗唐日双
Owner DALIAN JINZHOU MAOLONG IND
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