Marine valve and marine filter casting

A filter and marine technology, applied in the direction of process efficiency improvement, etc., can solve the problems of frequent replacement, general mechanical properties, increased cost, etc., and achieve the effect of improving the overall performance

Inactive Publication Date: 2021-01-29
LIYANG XINLI MASCH CASTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Marine valves and marine filter castings need to have excellent mechanical properties. The mechanical properties of marine valves and marine filter casting materials in the prior art are relatively general, resulting in frequent replacement and increased costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The marine valve and marine filter castings include the following raw materials in parts by weight: 70 parts of pig iron, 20 parts of steel scrap, 2 parts of nodulizer, 10 parts of recarburizer, and 1 part of inoculant.

[0025] The nodulizer is a rare earth magnesium ferrosilicon alloy, and the block size of the nodulizer is 10-20mm; the inoculant is 85% ferrosilicon, and the calcium content in the inoculant is 1.5-2.5%, and the aluminum content is 0.5-1%; The recarburizer is artificial graphite and calcined petroleum coke, and the artificial graphite and calcined petroleum coke are mixed in a mass ratio of 3:1.

[0026] The preparation method of the above-mentioned marine valve and marine filter casting specifically includes the following steps:

[0027] (1) Put pig iron, scrap steel and 90% recarburizer into the cupola to melt, cast iron ingots and put them into the induction furnace to melt, the temperature is controlled at 1400°C, and the molten iron is obtained af...

Embodiment 2

[0032] The marine valve and marine filter castings include the following raw materials in parts by weight: 73 parts of pig iron, 22 parts of steel scrap, 2.2 parts of nodulizer, 11 parts of recarburizer, and 1.2 parts of inoculant.

[0033] The nodulizer is a rare earth magnesium ferrosilicon alloy, and the block size of the nodulizer is 10-20mm; the inoculant is 85% ferrosilicon, and the calcium content in the inoculant is 1.5-2.5%, and the aluminum content is 0.5-1%; The recarburizer is artificial graphite and calcined petroleum coke, and the artificial graphite and calcined petroleum coke are mixed in a mass ratio of 3:1.

[0034] The preparation method of the above-mentioned marine valve and marine filter casting specifically includes the following steps:

[0035] (1) Put pig iron, scrap steel and 90% recarburizer into the cupola to melt, cast iron ingots and then put them into the induction furnace to melt, the temperature is controlled at 1450°C, and the molten iron is o...

Embodiment 3

[0040] The marine valve and marine filter castings include the following raw materials in parts by weight: 74 parts of pig iron, 23 parts of steel scrap, 2.5 parts of nodulizer, 13 parts of recarburizer, and 1.5 parts of inoculant.

[0041] The nodulizer is a rare earth magnesium ferrosilicon alloy, and the block size of the nodulizer is 10-20mm; the inoculant is 85% ferrosilicon, and the calcium content in the inoculant is 1.5-2.5%, and the aluminum content is 0.5-1%; The recarburizer is artificial graphite and calcined petroleum coke, and the artificial graphite and calcined petroleum coke are mixed in a mass ratio of 3:1.

[0042] The preparation method of the above-mentioned marine valve and marine filter casting specifically includes the following steps:

[0043] (1) Put pig iron, scrap steel and 90% recarburizer into the cupola to melt, cast iron ingots and then put them into the induction furnace to melt, the temperature is controlled at 1450°C, and the molten iron is o...

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PUM

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Abstract

The invention discloses a marine valve and marine filter casting in the technical field of marine castings. The marine valve and marine filter casting comprises the following raw materials in parts byweight: 70-80 parts of pig iron, 20-25 parts of scrap steel, 2-3 parts of a nodulizing agent, 10-15 parts of a carburant and 1-2 parts of an inoculant. When the calcium content of the inoculant is 1.5-2.5%, the aluminum content of the inoculant is 0.5-1% if the calcium-aluminum content of the inoculant is within the range, MgAl silicate inclusions are used as nucleation cores of the spheroidal graphite, MgCa sulfide is clamped in multi-phase nucleation of the spheroidal graphite to play an important role, the number of graphite nodules can be remarkably increased, and the inoculation effect is the best; and when the calcium content exceeds 2.5% and the aluminum content exceeds 1%, the inoculation effect is gradually reduced; and according to the marine valve and marine filter casting, pigiron, scrap steel and 90% of carburant are put into a cupola furnace to be molten and then put into an induction furnace to be molten after being poured into an iron ingot, sulfur in the pig iron andthe scrap steel is removed in advance, the casting defects of slag inclusion, air holes and the like caused by sulfide formed by excessive sulfur, magnesium and rare earth elements are avoided, and the overall performance of a casting is improved.

Description

technical field [0001] The invention relates to the technical field of marine castings, in particular to marine valves and marine filter castings. Background technique [0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, adjust and control the parameters (temperature, pressure and flow) of the conveying medium. According to its function, it can be divided into shut-off valve, check valve, regulating valve and so on. The valve is a control component in the fluid delivery system, which has functions such as cut-off, adjustment, flow diversion, reverse flow prevention, pressure stabilization, flow diversion or overflow pressure relief. Valves used in fluid control systems range from the simplest cut-off valves to various valves used in extremely complex automatic control systems, with a wide variety of varieties and specifications. Valves can be used to control the flow of various types of fluids such as air, water, steam, various...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/04C22C33/10C21C1/10
CPCC21C1/10C21C1/105C22C33/006C22C33/04C22C33/10Y02P10/20
Inventor 陈信华袁贤君
Owner LIYANG XINLI MASCH CASTING CO LTD
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