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High-chromium cast iron for slurry pump flow passage component

A high-chromium cast iron and flow-passing component technology, applied in the field of high-chromium cast iron and its preparation, can solve the problems of short service life, high-chromium cast iron wear resistance can not meet the requirements, etc., to achieve the goal of improving hardness, shape and distribution Effect

Inactive Publication Date: 2018-12-18
CHENGDU YONGYI PUMPS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the above-mentioned existing slurry pump flow parts have a short service life because the wear resistance of high chromium cast iron cannot meet the requirements, and the present invention provides a high-efficiency Chromium cast iron and its preparation method

Method used

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  • High-chromium cast iron for slurry pump flow passage component
  • High-chromium cast iron for slurry pump flow passage component
  • High-chromium cast iron for slurry pump flow passage component

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A high chromium cast iron used for the flow parts of the slurry pump, which is composed of the following components in mass percentage: 3.28%C, 0.74%Si, 0.97%Mn, 28.1%Cr, 0.62%Ni, 0.56%Mo, 0.046% Ce, 0.14% V, 0.065% B, 0.042% P, 0.018% S, and the balance is Fe.

[0025] A method for preparing high chromium cast iron used for the flow parts of a slurry pump, comprising the following steps:

[0026] (1) According to the component content and the composition of scrap steel, high carbon ferrochrome, low carbon ferrochrome, electrolytic nickel, ferrovanadium, ferroboron, ferromolybdenum, ferrosilicon, ferromanganese, ferrocerium, determine the scrap steel, high carbon ferrochrome , Low-carbon ferrochrome, electrolytic nickel, ferrovanadium, ferroboron, ferromolybdenum, ferrosilicon, ferromanganese, ferrocerium, and prepare charge;

[0027] (2) Put steel scrap, high-carbon ferrochrome, low-carbon ferrochrome, electrolytic nickel, ferromolybdenum, ferrosilicon, and ferromanga...

Embodiment 2

[0031] A high chromium cast iron used for the flow parts of the slurry pump, composed of the following components in mass percentage: 3.11%C, 0.55%Si, 1.18%Mn, 28.8%Cr, 0.51%Ni, 0.45%Mo, 0.032% Ce, 0.2% V, 0.06% B, 0.053% P, 0.022% S, and the balance is Fe.

[0032] A method for preparing high chromium cast iron used for the flow parts of a slurry pump, comprising the following steps:

[0033] (1) According to the component content and the composition of scrap steel, high carbon ferrochrome, low carbon ferrochrome, electrolytic nickel, ferrovanadium, ferroboron, ferromolybdenum, ferrosilicon, ferromanganese, ferrocerium, determine the scrap steel, high carbon ferrochrome , Low-carbon ferrochrome, electrolytic nickel, ferrovanadium, ferroboron, ferromolybdenum, ferrosilicon, ferromanganese, ferrocerium, and prepare charge;

[0034] (2) Put scrap steel, high-carbon ferrochrome, low-carbon ferrochrome, electrolytic nickel, ferromolybdenum, ferrosilicon, and ferromanganese into a...

Embodiment 3

[0038]A high chromium cast iron used for the flow parts of the slurry pump, which is composed of the following components in mass percentage: 3.36%C, 0.43%Si, 1.08%Mn, 27.4%Cr, 0.68%Ni, 0.51%Mo, 0.039% Ce, 0.29% V, 0.054% B, 0.032% P, 0.016% S, and the balance is Fe.

[0039] A method for preparing high chromium cast iron used for the flow parts of a slurry pump, comprising the following steps:

[0040] (1) According to the component content and the composition of scrap steel, high carbon ferrochrome, low carbon ferrochrome, electrolytic nickel, ferrovanadium, ferroboron, ferromolybdenum, ferrosilicon, ferromanganese, ferrocerium, determine the scrap steel, high carbon ferrochrome , Low-carbon ferrochrome, electrolytic nickel, ferrovanadium, ferroboron, ferromolybdenum, ferrosilicon, ferromanganese, ferrocerium, and prepare charge;

[0041] (2) Put scrap steel, high-carbon ferrochrome, low-carbon ferrochrome, electrolytic nickel, ferromolybdenum, ferrosilicon, and ferromangan...

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Abstract

The invention relates to high-chromium cast iron for a slurry pump flow passage component and a preparation method thereof. The high-chromium cast iron comprises the following components including, bymass, 3.1%-3.4% of C, 0.4%-0.8% of Si, 0.9%-1.2% of Mn, 27%-29% of Cr, 0.5%-0.7% of Ni, 0.4%-0.6% of Mo, 0.03%-0.05% of RE, 0.1%-0.3% of V, 0.05%-0.07% of B, not larger than 0.1% of P, not larger than 0.1% of S and the balance Fe. The hardness, strength, toughness and heat resistance of the high-chromium cast iron are improved by adding V, B and rare earth as modifiers and strictly controlling the contents of all components, and the aim of comprehensively regulating abrasive wear, fatigue wear and corrosion wear is achieved; and meanwhile, the morphology and distribution of carbide are improved in cooperation with heat treatment, the high-chromium cast iron with excellent wear resistance is obtained, and the service life is 6-12 months after being prepared into the slurry pump flow passage component.

Description

technical field [0001] The invention belongs to the field of materials for flow-through components of slurry pumps, and in particular relates to high-chromium cast iron used for flow-flow components of slurry pumps and a preparation method thereof. Background technique [0002] Slurry pumps are used to transport solid-liquid mixtures composed of solid materials with a certain particle size, hardness and concentration and water, such as mud, ore pulp, mortar, etc., and have been used in mining, metallurgy, thermal power generation, coal, chemical industry and environmental protection. Widely used in the industry, its four flow-passing components, such as the volute, impeller, front guard and rear guard, not only bear the erosion and wear of the material during the work process, but also bear the corrosion of the material. The severe wear is the slurry The long-standing problem of the pump, the flow-through parts of the slurry pump have become common wearing parts in the metal...

Claims

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Application Information

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IPC IPC(8): C22C37/08C22C37/10C22C33/08C21D1/18C21D5/00
CPCC21D1/18C21D5/00C22C33/08C22C37/08C22C37/10Y02P10/20
Inventor 鲜红军刘从江
Owner CHENGDU YONGYI PUMPS
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