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Multi-metal composite wear-resistant elbow pipe and preparation method thereof

An elbow pipe, multi-metal technology, applied in metal processing equipment, elbows, pipes/pipe joints/fittings, etc., can solve the problems of low hardness of 16Mn elbow pipe, high brittleness of elbow pipe, short service life, etc. Achieve the effect of broad cost-effective competition space, advanced manufacturing technology and long service life

Inactive Publication Date: 2014-03-26
YANTAI BRANCH NO 52 INST OF CHINA NORTH IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention mainly solves the problems of low hardness, poor abrasion resistance, short service life and Al coating on the inner wall of the elbow pipe of the existing 16Mn elbow pipe. 2 o 3 Elbow tubes made of materials such as ceramics are brittle, prone to cracks and partial shedding, and cannot withstand large impacts.

Method used

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  • Multi-metal composite wear-resistant elbow pipe and preparation method thereof
  • Multi-metal composite wear-resistant elbow pipe and preparation method thereof
  • Multi-metal composite wear-resistant elbow pipe and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1: see figure 1 , 2, 3. The material composition of the outer layer 1 of carbon cast steel is: C: 0.20%, Si: 0.45%, Mn: 0.80%, S≤0.04%, P≤0.04%, and the rest is iron; high chromium cast iron The material composition of the middle layer 2 is: C: 2.60%, Si: 0.50%, Mn: 2.60%, Cr: 15%, S≤0.06%, P≤0.10%, and the rest is iron; the inner layer of tungsten carbide granular ceramics 3 The material composition is by weight percentage: tungsten carbide: 20%, C: 2.60%, Si: 0.50%, Mn: 2.60%, Cr: 10%, S≤0.06%, P≤0.10%, and the rest is iron; Die vacuum casting multi-metal composite wear-resistant elbow pipe, the inner wall of the elbow pipe is composed of outer layer of carbon cast steel and inner layer of high chromium cast iron, and the outer wall is made of carbon cast steel outer layer 1, high chromium cast iron The middle layer 2 and the tungsten carbide granular ceramic inner layer 3 are composed of three layers of different materials.

[0042] The specific preparatio...

Embodiment 2

[0063] Example 2: see figure 1 , 2 , 3. The material composition of the outer layer 1 of carbon cast steel is: C: 0.24%, Si: 0.47%, Mn: 0.82%, S≤0.04%, P≤0.04%, and the rest is iron; high chromium cast iron The material composition of the middle layer 2 is: C: 2.70%, Si: 0.60%, Mn: 2.70%, Cr: 16.0%, S≤0.06%, P≤0.10%, and the rest is iron; the inner layer of tungsten carbide granular ceramics 3 The material composition is by weight percentage: tungsten carbide: 25%, C: 2.70%, Si: 0.60%, Mn: 2.70%, Cr: 14%, S≤0.06%, P≤0.10%, and the rest is iron; Die vacuum casting multi-metal composite wear-resistant elbow pipe, the inner wall of the elbow pipe is composed of outer layer of carbon cast steel and inner layer of high chromium cast iron, and the outer wall is made of carbon cast steel outer layer 1, high chromium cast iron The middle layer 2 and the tungsten carbide granular ceramic inner layer 3 are composed of three layers of different materials.

[0064] The specific prepara...

Embodiment 3

[0085] Embodiment 3: see figure 1 , 2, 3. The material composition of the outer layer 1 of carbon cast steel is: C: 0.28%, Si: 0.49%, Mn: 0.84%, S≤0.04%, P≤0.04%, and the rest is iron; high chromium cast iron The material composition of the middle layer 2 is by weight percentage: C: 2.90%, Si: 0.70%, Mn: 2.90%, Cr: 16.5%, S≤0.06%, P≤0.10%, and the rest is iron; the inner layer of tungsten carbide granular ceramics 3 The material composition is by weight percentage: tungsten carbide: 30%, C: 2.90%, Si: 0.70%, Mn: 2.90%, Cr: 18%, S≤0.06%, P≤0.10%, and the rest is iron; Die vacuum casting multi-metal composite wear-resistant elbow pipe, the inner wall of the elbow pipe is composed of outer layer of carbon cast steel and inner layer of high chromium cast iron, and the outer wall is made of carbon cast steel outer layer 1, high chromium cast iron The middle layer 2 and the tungsten carbide granular ceramic inner layer 3 are composed of three layers of different materials.

[008...

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Abstract

The invention discloses a multi-metal composite wear-resistant elbow pipe and a preparation method thereof, wherein the inner side wall of the elbow pipe is formed through the composition of carbon cast steel on an outer layer and high-chromium iron on an inner layer, and is characterized in that the outer side wall of the elbow pipe is formed through the composition of three layers of different materials, namely a carbon cast steel outer layer (1), a high-chromium iron intermediate layer (2) and a wolfram carbide particle ceramic inner layer (3); the preparation method of the multi-metal composite wear-resistant elbow pipe comprises the following steps: foam model making, painting and baking, elbow pipe outer layer model packing, smelting, sand box vacuum pumping and pouring, taking out and cleaning castings on a carbon cast steel outer layer of the elbow pipe, elbow pipe interlayer model assembling, wolfram carbide particulate material paste painting, coating painting and baking, binning, smelting, sand vacuum pumping and pouring, taking elbow pipe castings out, cleaning and detecting, heat treating to the elbow pipe castings, detecting the hardness of the end surface of the multi-metal composite wear-resistant elbow pipe, and then warehousing; the prepared multi-metal composite wear-resistant elbow pipe has the advantages that the comprehensive mechanical property is excellent, the service life is long, the manufacturing technology is advanced, the maintenance and the installation are convenient, and a wide cost performance competition space is provided.

Description

Technical field: [0001] The invention relates to the technical field of metal smelting, in particular to a multi-metal composite wear-resistant elbow pipe and a preparation method thereof. Background technique: [0002] Metal material pipes of various specifications are widely used in metallurgy, electric power, mining, coal, building materials and chemical industries, among which elbow pipes are an important part of the conveying system. Due to the strong erosion, erosion and wear of coal powder, ash and other media in the conveying system, the service life of the elbow pipe is 1 / 4~1 / 5 of that of the straight pipe, resulting in not only the replacement of the elbow pipe, but also the consumption of a large amount of metal materials. Moreover, the time taken to stop production, repair and replace the elbow pipe has always plagued its normal production. In recent years, 16Mn is the most used elbow material, which is formed by welding, but its hardness is low, its wear re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C37/10C22C32/00B22D18/06B22C3/00B22C9/04B22C9/08B22C9/24B22C21/01F16L43/00F16L57/06
Inventor 郭在在燕东明牟晓明刘国玺李康满蓬周亚伟乔光利赵斌高晓菊姜述庆王婵谢威
Owner YANTAI BRANCH NO 52 INST OF CHINA NORTH IND GRP
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