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A kind of vanadium titanium vermicular graphite cast iron

A technology of vermicular graphite cast iron and vanadium-titanium, which is applied in the field of vanadium-titanium vermicular graphite cast iron and its preparation, and can solve the problems of fast wear, hidden danger, unsatisfactory physical and mechanical properties, mechanical strength, low temperature resistance and thermal fatigue resistance, etc. problems, to achieve the effect of reducing costs, saving energy, and avoiding the secondary smelting process

Active Publication Date: 2015-11-25
SICHUAN PANZHIHUA SOUTHWEST IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Gray cast iron has a certain hardness, but the physical and mechanical properties, mechanical strength, low temperature resistance and thermal fatigue resistance of gray cast iron brake drums are not satisfactory in the practical process of automobiles, and thermal cracks and wear are prone to occur during use Fast phenomenon, causing certain security risks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] Sample preparation

[0031] The raw materials are configured into the following components according to weight percentage: 3.4~3.8% carbon, 2.1~2.5% silicon, 0.3~0.7% manganese, 0.10~0.30% vanadium, 0.10~0.20% titanium, 0.03~0.07% Antimony, 0.03~0.07% of chromium, 0.01~0.035% of residual magnesium, 0.02~0.045% of residual rare earth, 0.07-0.17% of phosphorus, no more than 0.07% of sulfur, the balance is iron and unavoidable impurities. The 1320℃~1350℃ high temperature molten iron obtained after melting the vanadium-titanium magnetite is directly transferred to the intermediate frequency furnace for smelting, and the melting temperature is greater than 1500℃; before the molten iron is discharged, the pouring treatment package is baked at 350~450℃, and then Vermicularizing agent, inoculant and covering agent, and metal antimony and chromium are placed at the bottom of the ladle; after the components in the molten iron furnace are qualified, they will be discharged at 1450℃~1...

Embodiment 1-3

[0033] According to the preparation method in the specific embodiment of the present invention, 3 furnaces of vanadium-titanium vermicular graphite cast iron test bars (No. 1, 2, 3) with different composition combinations within the specified composition range of the present invention are prepared.

[0034] Comparative material:

[0035] Ordinary vanadium-titanium gray cast iron sample (No. 4);

[0036] Vanadium-titanium vermicular graphite cast iron sample prepared by patent CN102080177 (No. 5).

[0037] Table 1, the chemical composition of each material (wt%):

[0038] NumberingC Si MnPSV TiCr Sb 13.532.230.560.080.0520.200.150.030.05 23.662.310.490.120.0490.220.160.040.06 33.552.280.630.110.0620.260.150.050.05 43.541.880.770.120.0610.350.3000 53.582.250.640.090.070.200.1500

[0039] The tensile test was carried out on the CMT5305AC300kN) electronic universal material testing machine (produced by Shenzhen Xinersi Co., Ltd.). The tensile strength and elongation of each sample were...

Embodiment 4

[0057] Example 4 Preparation of Vanadium Titanium Vermicular Graphite Cast Iron Brake Drum

[0058] The raw materials are configured into the following components according to weight percentage: 3.4~3.8% carbon, 2.1~2.5% silicon, 0.3~0.7% manganese, 0.10~0.30% vanadium, 0.10~0.20% titanium, 0.03~0.07% Antimony, 0.03~0.07% of chromium, 0.01~0.035% of residual magnesium, 0.02~0.045% of residual rare earth, 0.07-0.17% of phosphorus, no more than 0.07% of sulfur, the balance is iron and unavoidable impurities. The 1320℃~1350℃ high temperature molten iron obtained after melting the vanadium-titanium magnetite is directly transferred to the intermediate frequency furnace for smelting, and the melting temperature is greater than 1500℃; before the molten iron is discharged, the pouring treatment package is baked at 350~450℃, and then Vermicularizing agent, inoculant and covering agent, and metal antimony and chromium are placed at the bottom of the ladle; after the components in the molt...

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PUM

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Abstract

The invention discloses a vanadium-titanium vermicular cast iron. The vermicular cast iron consists of the following components in percentage by weight: 3.4-3.8% of carbon, 2.1-2.5% of silicon, 0.3-0.7% of manganese, 0.10-0.30% of vanadium, 0.10-0.20% of titanium, 0.03-0.07% of antimony, 0.03-0.07% of chromium, 0.01-0.035% of residual magnesium, 0.02-0.045% of residual rare earth, 0.07-0.17% of phosphorus, not greater than 0.07% of sulfur, and the balance of iron, wherein the content of pearlite in the vanadium-titanium vermicular cast iron is greater than 60%, and the percent of vermiculation is greater than 60%. The vanadium-titanium vermicular cast iron disclosed by the invention has the advantages of favorable mechanical property, favorable high-temperature thermal fatigue resistant property, favorable hot crackability resistance, favorable abrasion resistance and favorable heat-conducting property, and can be used for preparing automobile brake drums, automatic brake discs, cylinder bodies and cylinder caps of engines, exhaust manifolds and the like.

Description

technical field [0001] The invention belongs to the field of material metallurgy, and in particular relates to a vanadium-titanium vermicular graphite cast iron and a preparation method thereof. Background technique [0002] At present, the materials of automobile brake drums produced at home and abroad mainly include ordinary gray cast iron and alloy gray casts. Gray cast iron has a certain hardness, but the physical and mechanical properties, mechanical strength, low temperature resistance and thermal fatigue resistance of gray cast iron brake drums are not satisfactory in the practical process of automobiles, and thermal cracks and wear are prone to occur during use Fast phenomenon, causing certain security risks. [0003] In order to improve the strength and heat resistance of cast iron and avoid hot cracking during use, countries around the world have successively developed various alloy cast iron, and the added alloy elements mainly include Ni, Mo, Cu, Cr, etc. Ni an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C37/10C22C37/06
Inventor 宋东波刘宁
Owner SICHUAN PANZHIHUA SOUTHWEST IND CO LTD