Casting method of anti-corrosion wear-resisting low-chromium alloy material

A chromium alloy, anti-corrosion technology, applied in the direction of casting molding equipment, casting mold, casting mold composition, etc., can solve the problems of electrochemical corrosion, wear resistance, hardness and corrosion resistance, poor overall performance of alloy materials, etc. , to achieve the effect of improving the service life, excellent comprehensive performance and reducing the cost of use

Inactive Publication Date: 2016-12-07
蚌埠市北晨微型机床厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the high-hardness "chromium carbide" hard phase contained in high-chromium alloys can achieve high wear resistance, the weakness of high-chromium alloys is that the existence of a large amount of "chromium carbide" hard phases makes the overall performance of the alloy material poor.
And when it is used in the mineral processing industry, since the mill is a water mill, the high chromium alloy as a wear-resistant material will not only produce chemical corrosion. Electrochemical corrosion occurs under conductive conditions, and the use effect is not ideal
[0004] Existing cast low-chromium alloy materials are not good in terms of wear resistance, hardness and corrosion resistance at the same time, and cannot meet the requirements of the current society

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The casting method of a kind of anti-corrosion and wear-resistant low-chromium alloy material proposed by the present invention comprises the following steps:

[0025] S1. Smelting: Put pig iron and steel scrap into the smelting furnace and heat to 1500°C. After holding for 45 minutes, add ferrochromium, red copper, silicon-calcium alloy, ferromanganese and ferromolybdenum. Ferro-boron, heat up to 1560°C, add ferrochrome nitride, nickel-magnesium, titanium ingot and zirconium ingot after keeping warm for 20 minutes, keep warm until completely melted, and then remove slag to obtain molten alloy liquid. The elements include: C: 1.5 %, Si: 1.6%, Cr: 0.7%, Cu: 0.8%, Ca: 0.3%, Mn: 1.7%, Mo: 0.1%, N: 0.05%, Ni: 0.1%, Mg: 0.1%, Ti: 0.1 %, Zr: 0.05%, S: 0.01%, P: 0.03%, the balance is iron and unavoidable impurities;

[0026] S2. Pouring: Cool the molten alloy liquid obtained in S1 to 1350°C and pour it into the sand mold cavity coated with nano-coating on the surface. The coati...

Embodiment 2

[0030] The casting method of a kind of anti-corrosion and wear-resistant low-chromium alloy material proposed by the present invention comprises the following steps:

[0031] S1. Smelting: Put pig iron and steel scrap into the smelting furnace and heat to 1550°C. After keeping warm for 20 minutes, add ferrochrome, red copper, silicon-calcium alloy, ferromanganese and ferromolybdenum. Ferro-boron, heat up to 1600°C, add ferrochromium nitride, nickel-magnesium, titanium ingot and zirconium ingot after keeping warm for 10 minutes, keep warm until completely melted, then remove slag to obtain molten alloy liquid, and its elements include: C: 2.4 %, Si: 1.1%, Cr: 1.2%, Cu: 0.5%, Ca: 0.6%, Mn: 1.2%, Mo: 0.6%, N: 0.02%, Ni: 0.3%, Mg: 0.01%, Ti: 0.3 %, Zr: 0.03%, S: 0.04%, P: 0.02%, the balance is iron and unavoidable impurities;

[0032] S2. Pouring: Cool the molten alloy liquid obtained in S1 to 1400°C and pour it into the sand mold cavity coated with nano-coating on the surface. T...

Embodiment 3

[0036] The casting method of a kind of anti-corrosion and wear-resistant low-chromium alloy material proposed by the present invention comprises the following steps:

[0037] S1. Smelting: Put pig iron and steel scrap into the smelting furnace and heat to 1520°C. After holding for 30 minutes, add ferrochromium, red copper, silicon-calcium alloy, ferromanganese and ferromolybdenum. Ferro-boron, heat up to 1580°C, add ferrochromium nitride, nickel-magnesium, titanium ingots and zirconium ingots after keeping warm for 15 minutes, keep warm until completely melted, and then remove slag to obtain molten alloy liquid. The elements include: C: 1.7 %, Si: 1.5%, Cr: 0.8%, Cu: 0.7%, Ca: 0.4%, Mn: 1.6%, Mo: 0.2%, N: 0.04%, Ni: 0.1%, Mg: 0.07%, Ti: 0.2 %, Zr: 0.04%, S: 0.02%, P: 0.01%, the balance is iron and unavoidable impurities;

[0038] S2. Pouring: Cool the molten alloy liquid obtained in S1 to 1380°C and pour it into the sand mold cavity coated with nano-coating on the surface. Th...

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Abstract

The invention discloses a casting method of an anti-corrosion wear-resisting low-chromium alloy material. The casting method comprises the following steps that raw materials are added into a smelting furnace, heat is preserved until the raw materials are melted completely, then deslagging is carried out, melted alloy liquid is obtained, and all elements comprise C, Si, Cr, Cu, Ca, Mn, Mo, N, Ni, Mg, Ti, Zr, S, P and the balance iron and unavoidable impurities; the alloy liquid is poured into a sand mould cavity with the surface coated with nanometer paint, the nanometer paint is prepared from a nanometer material and refractory aggregate, and a casting green body is obtained; and the casting green body is subjected to thermal treatment to obtain the anti-corrosion wear-resisting low-chromium alloy material. According to the casting method of the anti-corrosion wear-resisting low-chromium alloy material, the alloy material obtained through casting can be used in multiple environments and has good corrosion resistance and wear resistance, the hardness can reach over 70 HRC, and the requirement for the wear-resisting alloy material in the actual using process is met.

Description

technical field [0001] The invention relates to the technical field of casting, in particular to a casting method of an anti-corrosion and wear-resistant low-chromium alloy material. Background technique [0002] In recent years, the technology of wear-resistant materials has been developed by leaps and bounds. Among them, cast high-chromium alloy materials, as a branch of wear-resistant materials, are most commonly used in industrial production. The wear resistance of high chromium alloy is determined by its microstructure. The main alloy composition of cast high chromium alloy materials is characterized by high chromium (≥12%) and high carbon (≥2%), and contains a large number of eutectic carbide hard phases in its microstructure. These hard phases and strong, The matrix with better toughness is combined to obtain excellent wear resistance. [0003] In the field of wear resistance, the pursuit of alloys with higher wear resistance and better comprehensive performance is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/06C22C33/10C22C38/02C22C38/04C22C38/18C22C38/16C22C38/12C22C38/08C22C38/14C22C37/10C22C37/08B22C3/00B22C1/00C21D1/18C21D1/60
CPCB22C1/00B22C3/00C21D1/18C21D1/60C21D2211/001C21D2211/002C22C33/06C22C33/10C22C37/08C22C37/10C22C38/001C22C38/002C22C38/02C22C38/04C22C38/08C22C38/12C22C38/14C22C38/16C22C38/18
Inventor 吴延贵
Owner 蚌埠市北晨微型机床厂
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