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A kind of nm600 high-strength wear-resistant pipe and its manufacturing process

A manufacturing process and technology for wear-resistant pipes, applied in the field of mortar cement and seamless steel pipes, can solve the problems of dependence on imports and high cost, and achieve the effects of easy manufacturing process, high hardenability, good hardness and wear resistance

Active Publication Date: 2019-04-26
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the cost is high and basically depends on imports

Method used

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  • A kind of nm600 high-strength wear-resistant pipe and its manufacturing process
  • A kind of nm600 high-strength wear-resistant pipe and its manufacturing process
  • A kind of nm600 high-strength wear-resistant pipe and its manufacturing process

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Embodiment

[0026] The chemical composition of the high-strength wear-resistant pipe of the present invention is shown in Table 1, the production method is shown in Table 2, and the mechanical properties are shown in Table 3. It can be seen that the steel grade of the present invention has stable mechanical properties.

[0027] Table 1 chemical composition (wt%)

[0028]

[0029] Table 2 PQF continuous rolling method and heat treatment system

[0030]

[0031] Table 3 mechanical properties

[0032]

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Abstract

The invention provides an NM600 high-strength wear-resistant pipe and a production process thereof. The NM600 high-strength wear-resistant pipe is characterized by comprising the following chemical components by weight: 0.69 to 0.75% of C, 0.20 to 0.40% of Si, 1.00 to 1.15% of Mn, no more than 0.025% of P, no more than 0.020% of S, 0.12 to 0.20% of Cr, 0.030 to 0.050% of V and no more than 0.010%of Al, with the balance being Fe and unavoidable impurities. According to the invention, the content of C is increased; proper V and Cr are added; the contents of sulfur and phosphorus are controlled;a high-temperature high-speed rolling method is employed; quenching treatment is carried out after rolling so as to obtain a martensite matrix structure; quenching stress is eliminated through low-temperature tempering treatment, so brittleness is reduced, and the structure reaches a stable state and can ultimately meet requirements on the mechanical properties of the NM600 high-strength wear-resistant pipe.

Description

technical field [0001] The invention relates to the field of mortar cement and seamless steel pipes. High-strength wear-resistant pipes are the key components of mortar cement conveying equipment. The conditions of use require seamless steel pipes not only to have high strength but also to have high hardness to ensure the wear resistance of steel pipes. performance. Background technique [0002] Steel materials with good wear resistance occupy an important position in construction machinery manufacturing. The use of ultra-high-strength wear-resistant steel plates will effectively reduce the weight of construction machinery and equipment and improve material utilization efficiency. Wear-resistant pipes are widely used in mining, construction, petrochemical and other industries, requiring both high strength and extremely high wear resistance. At present, three grades of wear-resistant pipes of 45Mn2, 55MnM and 65Mn are widely used in the mortar and cement transportation indu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/18C22C38/12C22C38/06C21D8/10
Inventor 袁琴李道刚董芬陈勇李应雄李琳琳洪汛高山吴宇新张云会
Owner ANGANG STEEL CO LTD
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