Economical wear-resistant steel and manufacturing method thereof

A technology of wear-resistant steel pipe and manufacturing method, which is applied in the field of wear-resistant steel, can solve the problems of troublesome concrete tamping, low wear resistance of boom pipes, frequent replacement, etc., and achieve shortened production process, high hardness, and reduced production costs Effect

Active Publication Date: 2014-12-24
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Domestically produced jib tubes have low wear resistance and are frequently replaced, causing great trouble for concrete injection on site
The inability of domestic boom pipes to surpass foreign advanced products has become a bottleneck restricting the development of boom pump trucks to high-end and leading the world

Method used

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  • Economical wear-resistant steel and manufacturing method thereof
  • Economical wear-resistant steel and manufacturing method thereof
  • Economical wear-resistant steel and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The chemical composition of the wear-resistant steel pipe of the present invention is shown in Table 1. After smelting according to the chemical composition shown in Table 1, heat the continuous casting slab or steel ingot to 1230°C, the rolling temperature of the first stage is 1010°C, and the reduction ratio is 85%, the rolling temperature of the second stage is 890°C, and the reduction ratio is 76% , the cooling rate is 5.60°C / s, the coiling temperature is 720°C, the quenching temperature is 835°C, the holding time is 15min, the tempering temperature is 130°C, the holding time is 15min, air cooling after tempering.

Embodiment 2

[0056] The implementation is the same as in Example 1, wherein the heating temperature of the continuous casting slab or steel ingot is 1210°C, the rolling temperature of the first stage is 1015°C, and the reduction ratio is 83%, the rolling temperature of the second stage is 840°C, the reduction ratio is 66%, and cooling The speed is 4.0°C / s, the coiling temperature is 708°C, the quenching temperature is 820°C, the holding time is 25min, the tempering temperature is 220°C, the holding time is 20min, air cooling after tempering.

Embodiment 3

[0058] The implementation is the same as in Example 1, wherein the heating temperature of the continuous casting slab or steel ingot is 1160°C, the rolling temperature of the first stage is 1020°C, and the reduction ratio is 85%, the rolling temperature of the second stage is 855°C, the reduction ratio is 75%, and cooling The speed is 9.5°C / s, the coiling temperature is 680°C, the quenching temperature is 880°C, the holding time is 28min, the tempering temperature is 280°C, the holding time is 46min, air cooling after tempering.

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Abstract

The invention discloses an economical wear-resistant steel and a manufacturing method thereof. The wear-resistant steel comprises chemical components of, by weight, 0.42-0.60% of C, 0.10-0.40% of Si, 0.60-1.40% of Mn, no more than 0.020% of P, no more than 0.010% of S, 0.20-0.80% of Cr, 0.010-0.080% of Al, 0.005-0.040% of Ti, 0.0010-0.0050% of Ca, no more than 0.0015% of B, 0.0030-0.0100% of N, and the balance of Fe and unavoidable impurities. The manufacturing method comprises steps of: smelting, casting, hot rolling, tubulation, welding, quenching and tempering. The wear-resistant steel pipe with high hardness and high wear resistance, which comprises the above components and is obtained through the above process, is applicable to a device with extreme susceptibility to wearing in engineering machinery, such as a concrete pumper conveying pipe.

Description

technical field [0001] The invention relates to wear-resistant steel, in particular to an economical wear-resistant steel pipe and a manufacturing method thereof. Background technique [0002] At present, with the rapid development of domestic construction machinery, the demand for materials is increasing, and the requirements for material quality are also getting higher and higher. The domestic demand for wear-resistant pipes for conveying pipelines in concrete pump trucks reaches hundreds of thousands of tons, which is the main application way for high-hardness and high-strength wear-resistant pipes. [0003] my country's boom-type concrete pump truck has developed rapidly in recent years, but there is still a certain gap between the refined design of the product, the control ability of manufacturing quality, the stability of the product and the process of the foreign advanced enterprises, and there are irregular specifications and series. Insufficient localization of part...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/28C21D8/02C21D8/10B21C37/08F16L9/02
Inventor 华蔚马越峰李红斌杨晓臻张涛毕伟松徐鼎华姚连登
Owner BAOSHAN IRON & STEEL CO LTD
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