Aluminum and molybdenum high-temperature-resistant nodular cast iron containing chromium and copper elements and preparation method thereof

A technology of ductile iron and high temperature resistance, applied in the field of aluminum molybdenum high temperature ductile iron, can solve the problems of high temperature resistance, high manufacturing cost and high cost, achieve good preparation formability and comprehensive mechanical properties, improve high temperature performance and high temperature Antioxidant ability, the effect of broad commercial application prospects

Active Publication Date: 2018-02-16
纳似韦科技(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of automobile engine technology, the gas discharge temperature is getting higher and higher, and the working temperature of the engine exhaust pipe and turbocharger housing has increased to above 800 °C. Conventional gray cast iron and ductile iron materials can no longer meet the requirements of high temperature resistance. Require
For example, SiMo heat-resistant ductile iron/ductile iron on the market has a heat-resistant temperature of only 760°C for volute and exhaust pipe products; Poor antioxidant capacity
[0003] At present, cast iron and cast steel materials that can meet the requirements of this high-temperature working environment have the following problems in actual use and processing: high-nickel heat-resistant cast iron (D5S), because it contains more th

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] An aluminum-molybdenum high-temperature-resistant ductile iron containing chromium and copper elements, the weight percentage of each component is: C 1.4%, Si 5.2%, Al 2.0%, Mo 0.9%, Cr 0.5%, Cu 1.5%; impurity element Mg≦ 0.06%, impurity element S≦0.06%, impurity element P≦0.15%, impurity element Mn≦0.7%, and the rest is Fe. Its concrete preparation steps are:

[0020] a. Batching smelting, configure the alloy according to the above target components, add 150 kg of cast iron and 150 kg of scrap steel into an intermediate frequency induction furnace with a standard capacity of 500 kg, and after the metal is melted, add industrial ferrosilicon, industrial ferromolybdenum, and ferrochrome 1. The copper wire reaches the above design composition, and the industrial pure aluminum ingot is added through the bell jar pressing method. During the smelting process of the ingredients, it is considered that about 5% of C will be burned, and the subsequent inoculation process will in...

Embodiment 2

[0025] An aluminum-molybdenum high-temperature-resistant ductile iron containing chromium and copper elements, the weight percentage of each component is: C 3.6%, Si 1.5%, Al9.0%, Mo 0.3%, Cr 0.5%, Cu 0.3%; impurity element Mg≦ 0.06%, impurity element S≦0.06%, impurity element P≦0.15%, impurity element Mn≦0.7%, and the rest is Fe. Its concrete preparation steps are:

[0026] a. Batching smelting, configure the alloy according to the above target components, add 150 kg of cast iron and 150 kg of scrap steel into an intermediate frequency induction furnace with a standard capacity of 500 kg, and after the metal is melted, add industrial ferrosilicon, industrial ferromolybdenum, and ferrochrome 1. The copper wire reaches the above design composition, and the industrial pure aluminum ingot is added through the bell jar pressing method. During the smelting process of the ingredients, it is considered that about 5% of C will be burned, and the subsequent inoculation process will inc...

Embodiment 3

[0031] An aluminum-molybdenum high-temperature-resistant ductile iron containing chromium and copper elements, the weight percentage of each component is: C 3.0%, Si 3.8%, Al 5.0%, Mo 3.0%, Cr 2.5%, Cu 1.5%; impurity element Mg≦ 0.06%, impurity element S≦0.06%, impurity element P≦0.15%, impurity element Mn≦0.7%, and the rest is Fe. Its concrete preparation steps are:

[0032] a. Batching smelting, configure the alloy according to the above target components, add 150 kg of cast iron and 150 kg of scrap steel into an intermediate frequency induction furnace with a standard capacity of 500 kg, and after the metal is melted, add industrial ferrosilicon, industrial ferromolybdenum, and ferrochrome 1. The copper wire reaches the above design composition, and the industrial pure aluminum ingot is added through the bell jar pressing method. During the smelting process of the ingredients, it is considered that about 5% of C will be burned, and the subsequent inoculation process will in...

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PUM

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Abstract

The invention discloses an aluminum and molybdenum high-temperature-resistant nodular cast iron containing chromium and copper elements. According to the technical scheme, the aluminum and molybdenumhigh-temperature-resistant nodular cast iron containing the chromium and copper elements is characterized in that the cast iron comprises, by weight, 1.4-3.6% of C, 1.5-5.2% of Si, 2.0-9.0% of Al, 0.3-3.0% of Mo, 0.5-2.5% of Cr, 0.3-1.5% of Cu, no more than 0.06% of impurity element Mg, no more than 0.06% of impurity element S, no more than 0.15% of impurity element P, no more than 0.7% of impurity element Mn, and the balance Fe. The aluminum and molybdenum high-temperature-resistant nodular cast iron containing the chromium and copper elements can resist the working temperature of 900 DEG C,has good heat shock performance, good high-temperature oxidation resistance performance and good formability, and is low in cost.

Description

technical field [0001] The invention relates to the field of cast iron materials, more specifically, it relates to an aluminum-molybdenum high-temperature-resistant nodular cast iron containing chromium and copper elements. Background technique [0002] With the development of automobile engine technology, the gas exhaust temperature is getting higher and higher, and the working temperature of the engine exhaust pipe and turbocharger housing has increased to above 800 °C. Conventional gray cast iron and ductile iron materials can no longer meet the requirements of high temperature resistance. Require. For example, SiMo heat-resistant ductile iron / ductile iron on the market has a heat-resistant temperature of only 760°C for volute and exhaust pipe products; Antioxidant ability is poor. [0003] At present, cast iron and cast steel materials that can meet the requirements of this high-temperature working environment have the following problems in actual use and processing: h...

Claims

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Application Information

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IPC IPC(8): C22C37/10C22C37/04C22C33/08B22D1/00
CPCB22D1/00C22C33/08C22C37/04C22C37/06C22C37/10
Inventor 王业双
Owner 纳似韦科技(苏州)有限公司
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