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Austenite nodular cast iron containing carbide and preparing method for austenite nodular cast iron containing carbide

A ductile iron and austenite technology, applied in the field of austenitic ductile iron and its preparation, can solve the problems of not reflecting the superiority of cast steel, inapplicability, etc., achieve good toughness, improve uniformity and stability, improve The effect of graphite morphology

Inactive Publication Date: 2016-08-10
HANSHAN DONGSHAN DEYU SPHERULITIC GRAPHITE CASTING FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this material does not reflect the superiority of the cast steel in the environment of low impact load or no impact, and is not suitable for such low impact (or no impact) environment.

Method used

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  • Austenite nodular cast iron containing carbide and preparing method for austenite nodular cast iron containing carbide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A carbide-containing austenitic ductile iron, containing the following percentage elements: C 3.5%, Si 3.0%, Mn 1.3%, Nb 0.25%, Ni 0.3%, V 0.25%, Mg 0.03%, RE 0.03 %, the balance is Fe and unavoidable impurities.

[0020] The preparation method of the austenitic nodular cast iron containing carbide comprises the following steps:

[0021] 1) Smelting: Add returned iron, scrap steel, pig iron, recarburizer, and ferronickel into an intermediate frequency induction furnace and raise the temperature to 1230°C, keep it for 6 minutes, then heat up to 1500°C for melting, tempering, to obtain the original molten iron, and take it out of the furnace;

[0022] 2) Spheroidization inoculation: the spheroidization inoculation treatment is carried out by the method of pouring into the bag, the low rare earth magnesium ferrosilicon alloy spheroidizer is placed in the lower layer of the bottom groove of the spheroidized bag, and 1 / 3 of the iron-silicon alloy inoculant is placed in the u...

Embodiment 2

[0026] A carbide-containing austenitic nodular cast iron containing the following elemental components in percentages: C 3.0%, Si 3.2%, Mn 1.0%, Nb 0.3%, Ni 0.2%, V 0.3%, Mg 0.02%, RE 0.045 %, the balance is Fe and unavoidable impurities.

[0027] The preparation method of the austenitic nodular cast iron containing carbide comprises the following steps:

[0028] 1) Smelting: Add returned iron, scrap steel, pig iron, recarburizer, and ferronickel into an intermediate frequency induction furnace and heat up to 1200°C, keep it for 10 minutes, then heat up to 1480°C for melting, quenching and tempering, to obtain the original molten iron, and take it out of the furnace;

[0029] 2) Spheroidization inoculation: the spheroidization inoculation treatment is carried out by the method of pouring into the bag, the low rare earth magnesium ferrosilicon alloy spheroidizer is placed in the lower layer of the bottom groove of the spheroidized bag, and 1 / 3 of the iron-silicon alloy inoculan...

Embodiment 3

[0033] A carbide-containing austenitic nodular cast iron containing the following elements in percentages: C 3.7%, Si 2.7%, Mn 1.5%, Nb 0.2%, Ni 0.4%, V 0.2%, Mg 0.04%, RE 0.02 %, the balance is Fe and unavoidable impurities.

[0034] The preparation method of the austenitic nodular cast iron containing carbide comprises the following steps:

[0035] 1) Smelting: Add returned iron, scrap steel, pig iron, recarburizer, and ferronickel into an intermediate frequency induction furnace and heat up to 1250°C, keep it for 5 minutes, then heat up to 1520°C for melting, tempering, and get the original molten iron, which is released from the furnace;

[0036] 2) Spheroidization inoculation: the spheroidization inoculation treatment is carried out by the method of pouring into the bag, the low rare earth magnesium ferrosilicon alloy spheroidizer is placed in the lower layer of the bottom groove of the spheroidized bag, and 1 / 3 of the iron-silicon alloy inoculant is placed in the upper l...

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Abstract

The invention discloses austenite nodular cast iron containing carbide. The austenite nodular cast iron containing the carbide comprises, by percent, 3.0%-3.7% of C, 2.7%-3.2% of Si, 1.0%-1.5% of Mn, 0.2%-0.3% of Nb, 0.2%-0.4% of Ni, 0.2%-0.3% of V, 0.02%-0.04% of Mg, 0.02%-0.045% of RE and the balance Fe and inevitable impurities. The invention further discloses a preparing method for the austenite nodular cast iron containing the carbide. The preparing method comprises the steps of smelting, nodulizing inoculating, pouring, heat treatment and the like. A matrix structure with bainite as a main part, retained austenite and a small amount of martensite is obtained through the isothermal oil quenching treatment technology, the structure distribution is even, the mechanical performance of CADI is further improved, very good tenacity, hardness and abrasion resistance are achieved, and the producing and preparing technology is simple.

Description

technical field [0001] The invention relates to the field of metallurgical casting, in particular to a carbide-containing austenitic nodular cast iron and a preparation method thereof. Background technique [0002] In the current highly developed society, the consumption of wear-resistant materials is huge. According to statistics, only China consumes more than 3 million tons of metal wear-resistant materials every year. If the occurrence of wear is prevented and slowed down by using the theory of friction and wear, the annual Savings of more than $14 billion. Metal wear-resistant materials are mainly divided into manganese steel series, wear-resistant alloy steel series, high-chromium cast iron series, etc. According to different cost and use environment requirements, different metal wear-resistant materials can be selected. For example, the hammer head widely used in the ore and metallurgical industry is made of ZGMn13Cr2 high-manganese cast steel. The hammer head is stre...

Claims

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Application Information

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IPC IPC(8): C22C37/04C22C37/10C22C33/08C21C1/10C21D1/20C21D5/00
CPCC21C1/105C21D1/20C21D5/00C22C33/08C22C37/04C22C37/10Y02P10/20
Inventor 裴德雨
Owner HANSHAN DONGSHAN DEYU SPHERULITIC GRAPHITE CASTING FACTORY
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