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High-strength and high-toughness ball-milling iron casting and manufacturing method thereof

A ductile iron, high toughness technology, applied in the field of foundry, can solve problems such as cost increase, softening of cast iron alloy, deformation of ductile iron castings, etc.

Inactive Publication Date: 2018-07-31
TAIHU AIJIE MACHINE CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ductile cast iron has rapidly developed into a cast iron material that is second only to gray cast iron and is widely used. In the field of machinery manufacturing, cast iron alloys are used to prepare parts with high wear resistance or components with complex structures. Cast iron alloys can be used in casting processes. Reduce the difficulty of processing and reduce production costs, but one defect of cast iron alloys is that during use, the high temperature resistance is limited. When the temperature is high, the cast iron alloy will soften, resulting in deformation of ductile iron castings
Therefore, ductile iron castings must be replaced after a period of use, which leads to increased costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The high-strength and high-toughness ductile iron casting of the present invention is composed of the following raw materials in mass percentage: C 1.5%, Si 1.7%, Mn 0.7%, S 0.01%, P 0.057%, Cu 0.1%, Cr 0.12%, Sb 0.006%, Mg 0.04%, Re 0.02%, and the rest is Fe.

[0016] The preparation method of the above-mentioned high-strength, high-toughness ductile iron casting comprises the following steps:

[0017] a Take each component according to weight percentage C 1.5%, Si 1.7%, Mn 0.7%, S 0.01%, P 0.057%, Cu 0.1%, Cr 0.12%, Sb 0.006%, Mg 0.04%, Re 0.02%, the rest It is Fe, which is melted in a smelting furnace to obtain the original molten iron;

[0018] b. The temperature of the original molten iron is 1500°C, start the nodularizing bag, add 1.1% nodulizer, 0.3% inoculant and 0.1% copper of the original molten iron weight into the nodularizing bag by pouring into the nodularizing bag, and inoculate with the flow Add an inoculant of 0.4% of the weight of the original molten...

Embodiment 2

[0023] The high-strength and high-toughness ductile iron casting of the present invention is composed of the following raw materials in mass percentage: C 1.8%, Si 1.9%, Mn 0.8%, S 0.015%, P 0.06%, Cu 0.18%, Cr 0.22% , Sb 0.007%, Mg 0.06%, Re 0.03%, and the rest is Fe.

[0024] The preparation method of the above-mentioned high-strength, high-toughness ductile iron casting comprises the following steps:

[0025] a Take each component according to the weight percentage C 1.8%, Si 1.9%, Mn 0.8%, S 0.015%, P 0.06%, Cu 0.18%, Cr 0.22%, Sb 0.007%, Re 0.03%, the rest is Fe, put Melting in the smelting furnace to obtain the original molten iron;

[0026] b The temperature of the original molten iron is 1520°C, start the nodularization bag, add 1.3% nodulizer, 0.32% inoculant and 0.2% copper of Cu to the nodularization bag, and then Flow inoculation adds the inoculant of 0.41% of the weight of the original molten iron to obtain molten iron and pours it; the inoculant is a ferrosilic...

Embodiment 3

[0031] The high-strength and high-toughness ductile iron casting of the present invention is composed of the following raw materials in mass percentage: C 2.1%, Si2.0%, Mn 0.9%, S 0.02%, P 0.0.07%, Cu 0.22%, Cr0.28 %, Sb0.009%, Mg0.08%, Re0.45%, and the rest is Fe.

[0032] The preparation method of the above-mentioned high-strength, high-toughness ductile iron casting comprises the following steps:

[0033] a Take each component according to weight percentage C 2.1%, Si 2.0%, Mn 0.9%, S 0.02%, P 0.0.07%, Cu 0.22%, Cr0.28%, Sb0.009%, Mg0.08%, Re0 .45%, and the rest is Fe, which is melted in a smelting furnace to obtain the original molten iron;

[0034] b The temperature of the original molten iron is 1550°C, start the spheroidizing bag, add 1.5% nodulizer, 0.35% inoculant and 0.22% Cu of the original molten iron weight into the spheroidizing bag, and inoculate with the flow Add the inoculant of 0.42% of the weight of the original iron liquid to obtain the iron liquid and po...

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Abstract

The invention discloses a high-strength and high-toughness ball-milling iron casting. The high-strength and high-toughness ball-milling iron casting is prepared from the following raw materials in percentage by mass: 1.5 to 2.1 percent of C, 1.7 to 2.0 percent of Si, 0.7 to 0.9 percent of Mn, 0.01 to 0.02 percent of S, 0.05 to 0.07 percent of P, 0.1 to 0.22 percent of Cu, 0.12 to 0.28 percent of Cr, 0.006 to 0.009 percent of Sb, 0.04 to 0.08 percent of Mg, 0.02 to 0.45 percent of Re and the balance of Fe. The ball-milling iron casting has higher strength and higher elongation rate; casting performance is improved; the efficiency of the metal material is brought into full play; and the application requirement of heavy vehicle on driving axle shell and bracket casting is met. The invention further discloses a manufacturing method thereof.

Description

technical field [0001] The invention relates to the technical field of casting, and relates to a ball-milled iron casting and a preparation method thereof, in particular to a high-strength, high-toughness ball-milled iron cast and a manufacturing method thereof. Background technique [0002] Nodular cast iron obtains nodular graphite 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. Ductile cast iron has rapidly developed into a cast iron material that is second only to gray cast iron and i...

Claims

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Application Information

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IPC IPC(8): C22C37/10C22C37/04C22C37/06C22C33/08
CPCC22C37/10C22C33/08C22C37/04C22C37/06
Inventor 陈结
Owner TAIHU AIJIE MACHINE CASTING
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