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Nodular cast iron with high wear resistance and long service life and preparation method of lower cylinder using the cast iron

A technology of high wear resistance and nodular cast iron, which is applied in the preparation of the lower cylinder and the processing of nodular cast iron, can solve the problems of high tensile strength, low tensile strength and low plasticity, and achieve high-quality comprehensive mechanical properties, high service life, The effect of ensuring wear resistance

Active Publication Date: 2018-09-14
GUANGDONG ZHONGTIAN CHUANGZHAN DUCTILE IRON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Moreover, in the prior art, ductile iron has the problem that the tensile strength and plasticity cannot be unified, either the tensile strength is high but the plasticity is low, or the tensile strength is small but the plasticity is high

Method used

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  • Nodular cast iron with high wear resistance and long service life and preparation method of lower cylinder using the cast iron
  • Nodular cast iron with high wear resistance and long service life and preparation method of lower cylinder using the cast iron
  • Nodular cast iron with high wear resistance and long service life and preparation method of lower cylinder using the cast iron

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation method of lower cylinder of ductile iron with high wear resistance and long service life

[0039] 1.1 Raw material preparation:

[0040] The overall raw material requirements for the lower cylinder are C: 3.80%, Si: 2.20%, Mn: 0.65%, P: 0.017%, S: 0.005%, Cu: 0.55%, Mo: 0.30%, La: 0.0041%, Mg: 0.038 %, the balance of iron and non-removable impurities. In the present embodiment, in order to achieve the above-mentioned raw material requirements, the specific raw material ratio of the present invention is:

[0041] 50 parts by weight of automobile scraps, 50 parts by weight of metal stamping parts, 4.10 parts by weight of carburizers, 1 part by weight of lanthanide nodulizers, 0.6 parts by weight of high-calcium barium inoculants, 0.56 parts by weight of copper, and 0.2 parts by weight of sulfur oxide Inoculants, 1.92 parts by weight of ferrosilicon, 0.75 parts by weight of ferromanganese, and 0.54 parts by weight of ferromolybdenum.

[0042] The present inv...

Embodiment 2

[0063] Preparation method of lower cylinder of ductile iron with high wear resistance and long service life

[0064] 1.1 Raw material preparation:

[0065] The overall raw material requirements for the lower cylinder are C: 3.88%, Si: 2.30%, Mn: 0.55%, P: 0.015%, S: 0.008%, Cu: 0.45%, Mo: 0.40%, La: 0.0059%, Mg: 0.045 %, the balance of iron and non-removable impurities. In the present embodiment, in order to achieve the above-mentioned raw material requirements, the specific raw material ratio of the present invention is:

[0066] 50 parts by weight of automotive scraps, 50 parts by weight of metal stamping parts, 4.30 parts by weight of carburizers, 1 part by weight of lanthanide nodulizers, 0.6 parts by weight of high-calcium barium inoculants, 0.46 parts by weight of copper, 0.15 parts by weight of sulfur oxide Inoculants, 2.22 parts by weight of ferrosilicon, 0.50 parts by weight of ferromanganese, and 0.73 parts by weight of ferromolybdenum.

[0067] The present invent...

Embodiment 3

[0084] Preparation method of lower cylinder of ductile iron with high wear resistance and long service life

[0085] 1.1 Raw material preparation:

[0086] The overall raw material requirements for the lower cylinder are C: 3.85%, Si: 2.25%, Mn: 0.60%, P: 0.018%, S: 0.010%, Cu: 0.50%, Mo: 0.35%, La: 0.0050%, Mg: 0.0040 %, the balance of iron and non-removable impurities.

[0087] In the present embodiment, in order to achieve the above-mentioned raw material requirements, the specific raw material ratio of the present invention is:

[0088] 50 parts by weight of automobile scraps, 50 parts by weight of metal stamping parts, 4.19 parts by weight of carburizers, 1 part by weight of lanthanide nodulizers, 0.6 parts by weight of high-calcium barium inoculants, 0.51 parts by weight of copper, and 0.2 parts by weight of sulfur oxide Inoculants, 2.12 parts by weight of ferrosilicon, 0.60 parts by weight of ferromanganese, and 0.64 parts by weight of ferromolybdenum.

[0089] The p...

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Abstract

The invention discloses high-wear-resistance long-life ductile iron, comprising, by weight, 3.80-3.88% of C, 2.20-2.30% of Si, 0.55-0.65% of Mn, < / =0.020% of P, < / =0.010% of S, 0.45-0.55% of Cu, 0.30-0.40% of Mo, 0.0040-0.0060% of La, 0.035-0.045% of Mg, and the balance of iron and unavoidable impurity. The invention is intended to provide the high-wear-resistance long-life ductile iron that has high rigidity and fatigue strength and has improved tensile strength and plasticity, and a method of producing a lower cylinder with the ductile iron.

Description

technical field [0001] The invention relates to the field of ductile cast iron processing, and more specifically relates to a ductile cast iron with high wear resistance and long service life and a method for preparing a lower cylinder using the cast iron. Background technique [0002] The barrel diesel pile driver is a high-performance pile foundation construction equipment, which is suitable for foundation construction of concrete piles, prefabricated piles, steel pipe piles, steel sheet piles, wooden piles and other pile types. The lower cylinder is an important part of the barrel diesel pile driver. It is not only used as the hammer seat of the whole machine, but also the piston made of QT600-3 (with a hardness of 220-260HB) moves up and down in the cylinder, and a huge pile is generated longitudinally during the movement. At the same time, it must bear the effect of high temperature and high pressure during diesel combustion; therefore, the lower cylinder is required to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C37/10C21C1/10C22C33/08B22C9/24B22D15/02B22D1/00C21D1/18C21D1/58C21D9/00C22B9/16C21D5/00E02D7/12
CPCB22C9/24B22D1/00B22D15/02C21C1/10C21D1/18C21D1/58C21D5/00C21D9/0068C21D2211/009C22B9/16C22C33/08C22C37/04C22C37/10E02D7/125E02D2300/0031Y02P10/20
Inventor 柯志敏陈永成何良荣陈捷文
Owner GUANGDONG ZHONGTIAN CHUANGZHAN DUCTILE IRON CO LTD
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