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High-chromium white abrasion-resistant cast iron abrasion-resistant material and production method thereof

A technology of wear-resistant cast iron and wear-resistant materials, applied in the field of high-chromium white cast iron wear-resistant wear-resistant materials and its manufacture, can solve the problems of high hazards for operators and difficult implementation, and achieve simple and easy control of smelting quality , Conducive to the effect of quality control

Active Publication Date: 2014-08-06
HUNAN LISHEN NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent No. CN100453674C publicized "a kind of low cost and high wear resistance hypereutectic cast iron and its manufacture", which adopts intermediate alloy + potassium salt + rare earth magnesium to incubate, and at the same time inoculates with alloy powder, although it can be obtained It is ideal for high-chromium cast iron, but mass production requires customization of intermediate alloys, and these alloy powders react strongly when inoculated with the flow, which is more harmful to operators and difficult to achieve

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1, the present invention includes C, Cr, Si, Mn, Mo, V, Ti, B, Fe, the weight percentage of raw materials is: 3.60wt%-4.20wt% C, 22.0wt%-26.0wt% Cr, Carbon and chromium are the two most important alloying elements in high chromium cast iron. The wear resistance of high chromium cast iron is determined by the amount of carbides, while the content of carbon and chromium directly determines the amount of carbide materials, and its volume fraction can be estimated by the following formula: Φ carbide %=12.33wC+0.55wCr- 15.2 Increasing the carbon content can increase the number of carbides, but it will increase the eutectic point of high-chromium cast iron, the carbon content of the eutectic point [content fraction, wCE], the eutectic carbon content changes with the chromium content, and the specific calculation can refer to the following Formula: wCE=4.40-0.054wCr The ratio of chromium to carbon also affects the M in the casting 7 C 3 The relative amount of type ca...

Embodiment 2

[0014] Embodiment 2, the preparation method of the present invention is divided into a casting process and a heat treatment process. The raw materials are proportioned and melted, and ferro-titanium and ferro-boron are weighed in proportion for future use. A small amount of scrap steel is added before melting, and ferrochromium and ferromolybdenum are added after the scrap steel is melted. , raise the temperature of molten iron to 1400-1450°C, add 0.20%-0.30% composite deoxidizer to the molten iron for pre-deoxidation, then add 0.30%-0.40% pure aluminum wire for final deoxidation, clean the slag, and reach the furnace When the volume is 70-80%, the melting liquid is sampled and tested. After the composition is adjusted to meet the requirements, the temperature is measured. The tapping temperature is 1480±15°C. , Add 0.20%-0.30% rare earth magnesium into the ladle before tapping the molten iron, pour it into the molten iron for modification treatment, stir the incompletely react...

Embodiment 3

[0015] Example 3, the Ti and B described in the present invention are added after deoxidation. All the other are the same as above-mentioned embodiment.

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Abstract

The invention discloses a high-chromium white abrasion-resistant cast iron abrasion-resistant material and a production method thereof, belongs to a cast iron material and a production method thereof, and mainly solves the technical problems that existing cast iron materials are higher in cost, poor in abrasion resistance, poorer in applicability, insufficient in hardness, smaller in workpiece impact load and the like. According to the technical scheme, the material is characterized by comprising raw materials in percentage by weight as follows: 3.60wt%-4.20wt% of C, 22.0wt%-26.0wt% of Cr, 0.80wt%-1.20wt% of Si, 0.60wt%-1.00wt% of Mn, 0.50wt%-0.70wt% of Mo, 0.20wt%-0.30wt% of V, 0.10wt%-0.20wt% of Ti, 0.10wt%-0.20wt% of B and the balance of Fe and inevitable impurities. The material is mainly applied to production of cast iron materials and the quality control during production.

Description

technical field [0001] The invention relates to a cast iron material and a manufacturing method thereof, in particular to a high-chromium white wear-resistant cast iron wear-resistant material and a manufacturing method thereof. Background technique [0002] At present, high chromium cast iron has been considered as an ideal wear-resistant material since its inception, and is widely used in metallurgy, mining, building materials, electric power, transportation, machinery and other fields. It is also widely used in large crusher grinding rings, hammer heads, shot blasting machine blades, and wear-resistant castings in high temperature environments such as rolls, blast furnace bells, blast furnace lining plates, etc., and has achieved good economic benefits. [0003] M in high chromium cast iron 7 C 3 The hardness of type carbide is very high, 1200-1800HV. This kind of carbide is distributed in the matrix in the form of isolated hexagonal rods or flakes. Because the degree o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C33/10C21D5/04
Inventor 李德海刘树良
Owner HUNAN LISHEN NEW MATERIAL TECH