Seamless steel tube plug and preparation method thereof

A technology of seamless steel pipes and seamless pipes, applied in metal rolling, manufacturing tools, metal rolling, etc., can solve the problems of low hardness, poor wear performance, and poor temperature resistance of seamless steel pipe heads, and achieve stable chemical Effects of performance and physical properties, long service life, extended online use time

Pending Publication Date: 2022-03-29
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a seamless steel pipe plug and its preparation method, which mainly solve the technical problems of low hardness, poor temperature resistance and poor wear performance of the existing seamless steel pipe plug

Method used

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  • Seamless steel tube plug and preparation method thereof
  • Seamless steel tube plug and preparation method thereof
  • Seamless steel tube plug and preparation method thereof

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Embodiment Construction

[0033] Below in conjunction with specific embodiment 1-5, the present invention is further described, as shown in table 1-3, table 1 is the chemical composition (by weight percentage) of the cobalt-based spray coating of the seamless steel pipe head of the embodiment of the present invention, and the balance is Fe and unavoidable impurities.

[0034] Table 1 The chemical composition of the cobalt-based spray coating on the head of the seamless steel pipe according to the embodiment of the present invention, unit: weight percent.

[0035]

[0036]

[0037] The preparation method of the above-mentioned seamless steel pipe plug includes:

[0038] 1) Prepare the substrate of the seamless pipe plug, mechanically finish the 35CrMo substrate of the seamless pipe plug to the design size, the surface of the 35CrMo substrate is provided with a spiral groove, the groove depth is 4.0mm, and the pitch is 8.0mm;

[0039] 2) Preparation of cobalt-based spray coating materials, accordi...

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Abstract

The invention discloses a seamless steel tube plug and a preparation method thereof. The technical problems that an existing seamless steel tube plug is low in hardness, poor in temperature resistance and poor in wear resistance are mainly solved. According to the technical scheme, the seamless steel pipe top head is composed of a 35CrMo base body and a cobalt-based spraying layer, the surface of the 35CrMo base body is covered with the cobalt-based spraying layer, the thickness of the cobalt-based spraying layer is 0.30-0.50 mm, and the cobalt-based spraying layer comprises, by weight, 10.0%-15.0% of Co, 1.0%-1.5% of C, 25%-30% of Cr, 10%-12% of W and Silt. 1.0, Blt; 1.0%, and the balance of Fe and inevitable impurities. The surface hardness value of the seamless steel pipe plug is 1000-1200 HV, the surface roughness of the cobalt-based spraying coating of the seamless steel pipe plug is 2.5-3.0 microns, and the seamless steel pipe plug is long in service life.

Description

technical field [0001] The invention relates to a seamless steel pipe piercing machine plug, in particular to a seamless steel pipe plug and a preparation method thereof, in particular to a seamless steel pipe plug covered with a Co-based wear-resistant material on the surface and a preparation method thereof, belonging to The technical field of metal materials, metal material surface treatment and seamless steel pipe piercing machine piercing head. Background technique [0002] The working conditions of the perforated plug in the existing seamless steel pipe production are quite harsh. During the piercing process, the plug is directly in contact with the inner wall of the high-temperature tube blank, and rotates counterclockwise with the tube blank. The plug is subjected to compressive stress, shear stress, and surface friction. The surface working temperature is above 900°C. , The plug must be quenched once with water, so failures such as sticking steel, flat nose, cracki...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/06C23C4/129C22C38/02C22C38/22C22C38/30C22C38/32B21B25/00
CPCC23C4/06C23C4/129C22C38/30C22C38/22C22C38/32C22C38/02B21B25/00
Inventor 陶翀刘欣殷胜
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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