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High strength and high extending nodular iron casting and preparation method thereof

A nodular cast iron, high-strength technology, applied in the field of nodular graphite cast iron, can solve problems such as deficiencies and achieve excellent results

Inactive Publication Date: 2019-02-01
SUZHOU TORIN MACHINERY CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on this, those skilled in the art have made the following improvements, such as Chinese invention patent CN103572142A, which discloses a method for preparing nodular cast iron. The nodular cast iron prepared by this method has high toughness, ferrite content and spheroidization rate Both are very high, the plasticity and toughness of castings are greatly improved, the strength is high, the impact strength is high, the elongation of ductile iron is significantly enhanced, the tensile strength is ≥600Mpa, the elongation is ≥8%, and the highest elongation can reach 12%, which is much higher. According to national standards; another example is Chinese invention patent CN104513926B, which discloses high-strength, high-elongation ductile iron and its preparation method. The ductile iron produced by this patent is of high quality, with tensile strength ≥ 436MPa, yield strength ≥ 284MPa, ≥161HB, elongation ≥20%, scrap rate ≤8%; although the above two patents have achieved a certain higher strength or higher elongation, they are still slightly insufficient

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  • High strength and high extending nodular iron casting and preparation method thereof
  • High strength and high extending nodular iron casting and preparation method thereof
  • High strength and high extending nodular iron casting and preparation method thereof

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Effect test

Embodiment 1

[0042] This embodiment provides a high-strength and high-elongation ductile iron casting. The ductile iron casting includes the following components: in terms of mass percentage, the mass fraction of each component in the ductile iron casting is: C: 3.1% , Si: 4.1%, Mn: 0.15%, P: 0.04%, S: 0.015%, Cu: 0.04%, Sn: 0.008%, Mg: 0.04%, Cr: 0.03%, Ti: 0.02%, Ni: 0.015% , Al:0.03%, Mo:0.02%, Co:0.008%, V:0.015%, Sb:0.002%, Ce:0.003%, As:0.006%, Pb:0.0015%, Bi:0.001%, Te:0.002% And B: 0.001%, the rest is Fe and unavoidable impurities.

[0043] Its preparation method is as follows: described preparation method comprises:

[0044] (1) Weigh each component according to the formula ratio, then mix and melt at 1500-1550°C to obtain a melt;

[0045] (2) The contents of each component in the molten liquid prepared in the detection step (1) are compared with the ratio of the formula, if consistent, then proceed to the next step, if not, adjust by adding materials to make the detection The ...

Embodiment 2

[0051] This embodiment provides a high-strength and high-elongation ductile iron casting. The ductile iron casting includes the following components: in terms of mass percentage, the mass fraction of each component in the ductile iron casting is: C: 3.2% , Si: 4.2%, Mn: 0.15%, P: 0.04%, S: 0.015%, Cu: 0.04%, Sn: 0.008%, Mg: 0.04%, Cr: 0.03%, Ti: 0.02%, Ni: 0.015% , Al:0.03%, Mo:0.02%, Co:0.008%, V:0.015%, Sb:0.002%, Ce:0.003%, As:0.006%, Pb:0.0015%, Bi:0.001%, Te:0.002% And B: 0.001%, the rest is Fe and unavoidable impurities.

[0052] Its preparation method is as follows: described preparation method comprises:

[0053] (1) Weigh each component according to the formula ratio, then mix and melt at 1500-1550°C to obtain a melt;

[0054] (2) The contents of each component in the molten liquid prepared in the detection step (1) are compared with the ratio of the formula, if consistent, then proceed to the next step, if not, adjust by adding materials to make the detection The ...

Embodiment 3

[0060] This embodiment provides a high-strength and high-elongation ductile iron casting. The ductile iron casting includes the following components: in terms of mass percentage, the mass fraction of each component in the ductile iron casting is: C: 3.3% , Si: 4.3%, Mn: 0.15%, P: 0.04%, S: 0.015%, Cu: 0.04%, Sn: 0.008%, Mg: 0.04%, Cr: 0.03%, Ti: 0.02%, Ni: 0.015% , Al:0.03%, Mo:0.02%, Co:0.008%, V:0.015%, Sb:0.002%, Ce:0.003%, As:0.006%, Pb:0.0015%, Bi:0.001%, Te:0.002% And B: 0.001%, the rest is Fe and unavoidable impurities.

[0061] Its preparation method is as follows: described preparation method comprises:

[0062] (1) Weigh each component according to the formula ratio, then mix and melt at 1500-1550°C to obtain a melt;

[0063] (2) The contents of each component in the molten liquid prepared in the detection step (1) are compared with the ratio of the formula, if consistent, then proceed to the next step, if not, adjust by adding materials to make the detection The ...

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Abstract

The invention discloses a high strength and high extending nodular iron casting and a preparation method thereof. The high strength and high extending nodular iron casting comprises, by mass percentage, 3.1-3.3% of C, 4.1-4.3% of Si, 0<Mn<=0.2%, 0<P<=0.05%, 0<S<=0.02%, 0<Cu<=0.05%, 0<Sn<=0.01%, 0.03-0.045% of Mg, 0<Cr<=0.05%, 0<Ti<=0.05%, 0<Ni<=0.02%, 0<Al<=0.04%, 0<Mo<=0.03%, 0<Co<=0.01% and thebalance Fe and trace elements. The preparation method comprises burdening, fusing, detecting whether the content of components is qualified or not, nodulizing and inoculating, casting, cooling and heat treatment. The nodular iron casting can achieve both high strength and high extending performance.

Description

technical field [0001] The invention belongs to the field of nodular cast iron, and in particular relates to a high-strength and high-elongation nodular iron cast and a preparation method thereof. Background technique [0002] Ductile cast iron is a kind of cast iron in which the graphite in cast iron is spherical. The graphite is formed into a spherical shape through spheroidizing treatment. This spherical graphite can reduce the stress concentration and reduce the cracking of the matrix. Due to the high strength, plasticity and toughness of ductile iron, the fatigue strength is close to that of medium carbon steel, the wear resistance is better than that of non-alloy steel, the cutting performance is comparable to that of gray cast iron, and the manufacturing cost is low, it has been widely used. . [0003] In the production process of nodular cast iron, molten iron can be formed after melting raw materials with different ratios. The quality of molten iron and the effect ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C37/08C22C37/06C22C37/04C22C33/10
CPCC22C37/10C22C33/10C22C37/04C22C37/06C22C37/08
Inventor 王凯王传宝
Owner SUZHOU TORIN MACHINERY CASTING
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