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Integral intermediate groove of isothermal quenching ductile iron conveyor and preparation method

A technology of isothermal quenching ductile iron and isothermal quenching, which is applied to conveyors, transportation and packaging, etc., can solve the problems of reducing fully mechanized mining efficiency, many times of downtime for maintenance, poor wear resistance, etc., to reduce downtime and improve coal mining. Efficiency and good wear resistance

Inactive Publication Date: 2009-12-16
宣化冶金工业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an integral middle groove of an isothermally quenched nodular cast iron scraper conveyor with high strength and good wear resistance; Too many times, reducing the efficiency of fully mechanized mining

Method used

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  • Integral intermediate groove of isothermal quenching ductile iron conveyor and preparation method

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Experimental program
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Effect test

Embodiment 1

[0034] An integral intermediate trough of an isothermally quenched nodular cast iron scraper conveyor with high strength and good wear resistance. The raw material of the integral intermediate trough is isothermally quenched nodular cast iron. The nodular cast iron includes the following chemical components in weight percentages:

[0035] C 3.40, Si 2.00, Mn<0.3, P<0.03, S<0.02, Mg 0.04,

[0036] Re 0.01, Cu 0.60, Mo 0.20, and the rest are iron.

[0037] The metallographic matrix structure of graphite in the austempered ductile iron is acicular ferrite+austenite;

[0038] The nodularization rate of the ductile iron is above grade two, and the number of graphite nodules is ≥100 / mm 2 .

[0039] The aforementioned method for preparing an integral middle tank of a high-strength, good-wear-resistant isothermally quenched nodular cast iron scraper conveyor comprises the following steps:

[0040] 1) Production of nodular cast iron: use low-carbon scrap steel to add carburant charg...

Embodiment 2

[0058] An integral intermediate trough of an isothermally quenched nodular cast iron scraper conveyor with high strength and good wear resistance. The raw material of the integral intermediate trough is austempered nodular cast iron. The nodular cast iron includes the following chemical components in weight percentage:

[0059] C 3.60, Si 2.40, Mn<0.3, P<0.03, S<0.02, Mg 0.05,

[0060] Re 0.02, Cu 0.80, Mo 0.30, and the rest are iron.

[0061] The metallographic matrix structure of graphite in the austempered ductile iron is acicular ferrite+austenite;

[0062] The nodularization rate of the ductile iron is above grade two, and the number of graphite nodules is ≥100 / mm 2 .

[0063] The aforementioned method for preparing an integral middle tank of a high-strength, good-wear-resistant isothermally quenched nodular cast iron scraper conveyor comprises the following steps:

[0064] 1) Production of nodular cast iron: use low-carbon scrap steel to add carburant charge, and melt n...

Embodiment 3

[0082] An integral intermediate trough of an isothermally quenched nodular cast iron scraper conveyor with high strength and good wear resistance. The raw material of the integral intermediate trough is austempered nodular cast iron. The nodular cast iron includes the following chemical components in weight percentage:

[0083] C 3.43, Si 2.25, Mn 0.22, P 0.021, S 0.012, Mg 0.055,

[0084] Re 0.019, Cu 0.74, Mo 0.25, and the rest are iron.

[0085] The metallographic matrix structure of graphite in the austempered ductile iron is acicular ferrite+austenite;

[0086] The nodularization rate of the ductile iron is above grade two, and the number of graphite nodules is ≥100 / mm 2 .

[0087] The aforementioned method for preparing an integral middle tank of a high-strength, good-wear-resistant isothermally quenched nodular cast iron scraper conveyor comprises the following steps:

[0088] 1) Production of nodular cast iron: use low-carbon scrap steel to add carburant charge, and...

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Abstract

The invention discloses an integral intermediate groove of an isothermal quenching ductile iron conveyor. The raw material of the integral intermediate groove is isothermal quenching ductile iron, and the ductile iron comprises the following chemical components in percentage by weight: 3.40 to 3.60 percent of C, 2.00 to 2.40 percent of Si, less than 0.3 percent of Mn, less than 0.03 percent of P, less than 0.02 percent of S, 0.04 to 0.055 percent of Mg, 0.01 to 0.02 percent of Re, 0.60 to 0.80 percent of Cu, 0.20 to 0.30 percent of Mo, and the balance of iron. The integral intermediate groove has the following advantages of high strength, good abrasion resistance, light weight and the like; and the preparation method changes a combined structure of the prior intermediate groove which is formed by welding abrasion-resistant steel plates on a cast steel groove twice into the integral intermediate groove which is cast by a new single isothermal quenching ductile iron material, reduces the time for stopping a machine, and improves the coal mining efficiency.

Description

technical field [0001] The invention relates to a scraper conveyor integral middle trough used in the coal machinery industry and a preparation method thereof, in particular to an isothermally quenched nodular cast iron scraper conveyor integral middle trough with high strength and good wear resistance and its Preparation. Background technique [0002] The scraper conveyor is one of the most important equipment in the coal machinery industry, and the middle trough is the key component of the scraper conveyor. The traditional middle tank is made of ordinary cast steel. In order to enhance its wear resistance, wear-resistant steel plates such as high manganese steel are welded on the surface of the cast steel middle tank. Under normal working conditions, the high manganese steel plate has HB≈220-330, and its wear resistance is limited, so it needs to be shut down frequently for inspection and welding repair. This greatly reduces the reliability of the scraper conveyor, reduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65G19/28C22C37/10C22C33/08B22D1/00C21D1/20C21D1/34C21D5/00
Inventor 王怀林许凤海王烈
Owner 宣化冶金工业有限责任公司
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