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High-rigidity high-chromium cast iron and application thereof

A high-chromium cast iron, high-hardness technology, applied in the direction of furnaces, lighting and heating equipment, furnace types, etc., can solve the problems of low hardness and easy damage of grate bars, and achieve the effect of improving hardness and oxidation resistance

Inactive Publication Date: 2015-11-04
NANJING HUYOU METALLURGY MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing grate bars for sintering trolleys are generally made of ordinary heat-resistant cast iron with low hardness, and because the grate bars are usually directly in the harsh working conditions of long-term high-temperature baking of sintering trolleys, the sintering trolley furnace made of cast iron The grate is extremely fragile

Method used

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  • High-rigidity high-chromium cast iron and application thereof
  • High-rigidity high-chromium cast iron and application thereof
  • High-rigidity high-chromium cast iron and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0016] High hardness and high chromium cast iron, including the following components by weight: 1.70% carbon, 0.90% silicon, 0.30% manganese, 0.020% phosphorus, 0.02% sulfur, 24.0% chromium, 0.90% nickel, 0.40% molybdenum, 0.01% niobium, The rest is iron.

Embodiment 2

[0018] High hardness and high chromium cast iron, including the following components by weight: 2.10% carbon, 0.60% silicon, 0.40% manganese, 0.030% phosphorus, 0.07% sulfur, 25.0% chromium, 2.10% nickel, 0.20% molybdenum, 0.13% niobium, The rest is iron.

Embodiment 3

[0020] High-hardness and high-chromium cast iron, including the following components by weight: carbon 2.00%, silicon 0.80%, manganese 0.38%, phosphorus 0.028%, sulfur 0.03%, chromium 24.3-24.6%, nickel 1.80%, molybdenum 0.34%, niobium 0.10% %, the rest is iron.

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Abstract

The invention provides high-rigidity high-chromium cast iron and an application thereof. The high-rigidity high-chromium cast iron comprises the following ingredients: 1.70-2.10wt% of carbon, 0.60-0.90wt% of silicon, 0.30-0.40wt% of manganese, 0.020-0.030wt% of phosphorus, 0.02-0.07wt% of sulfur, 24.0-25.0wt% of chromium, 0.90-2.10wt% of nickel, 0.20-0.40wt% of molybdenum, 0.01-0.13wt% of niobium and the balance ferrum. According to the high-rigidity high-chromium cast iron, carbon, silicon, manganese, phosphorus, sulfur, chromium, nickel, molybdenum, copper and niobium are added and matched mutually, so that the rigidity, the oxidation resistance, the corrosion resistance, the corrosion-erosion resistance, the pressure resistance and the shock resistance of the cast iron are improved greatly.

Description

technical field [0001] The invention belongs to the field of coking coal equipment, particularly relates to a high-hardness and high-chromium cast iron, and also provides an application of the high-hardness and high-chromium cast iron in preparing grate bars for sintering trolleys. Background technique [0002] The sintering machine is suitable for the sintering operation of large-scale ferrous metallurgical sintering plants. It is the main equipment in the draft sintering process. It can sinter concentrate powder and rich mineral powder with different components and particle sizes into blocks, and partially eliminate the sulfur contained in the ore. , phosphorus and other harmful impurities. [0003] Iron and steel metallurgical sintering mainly produces artificial rich ore for smelting. In order to improve the metallurgical performance of the ore, grate bars must be used on the sintering machine to bear the weight of the sintering ore. The gap between the grate bars is use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/08C22C37/10F27B21/02
Inventor 武良辰武兆乾
Owner NANJING HUYOU METALLURGY MACHINERY MFG