Base steel composite material for seamless steel pipe top and preparation method thereof

A seamless steel pipe and composite material technology, applied in metal rolling, manufacturing tools, metal rolling, etc., can solve problems affecting the service life of the plug and product qualification rate, surface scale peeling, longitudinal cracking, etc., to achieve excellent resistance Oxidation and high temperature performance, long service life, good effect of high temperature oxidation resistance

Active Publication Date: 2009-03-25
JILIN UNIV
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Under the action of cyclic high temperature and repeated extrusion force, the main failure forms on the surface of the plug are surface scale peeling, nose collapse, longitudinal cracking, and bonded steel pipes, etc., which seriously affect the service life of the plug and the product qualification rate

Method used

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  • Base steel composite material for seamless steel pipe top and preparation method thereof
  • Base steel composite material for seamless steel pipe top and preparation method thereof
  • Base steel composite material for seamless steel pipe top and preparation method thereof

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Embodiment Construction

[0027] A steel-based composite material for the plug of a seamless steel pipe machine, which uses the combustion synthesis chemical reaction in the negative pressure casting mold cavity to form a TiC ceramic-metal reinforced area with a thickness of 15 to 20 mm at the front nose of the plug; The bond between the ceramic reinforced area and the plug is a metallurgical bond.

[0028] A method for preparing a steel-based composite material for a seamless steel pipe machine head, the specific process steps are as follows:

[0029] Ti powder, C powder and Ni powder with particle size less than 50 microns, and the ratio of Ti powder and C powder is Ti:C=1:1 by molar ratio, Ni content weight percent is respectively 20%, 30% and 40% Put the reactant powder into the ball mill mixer and mix the material for 5-8 hours to make it evenly mixed; then put the powder into the mold and press it into a compact at room temperature, the compaction rate of the compact is 70±5% ; Then put the reac...

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Abstract

Disclosed is base steel composite material used for the top of a seamless pipe machine and the preparation method thereof, belonging to the application field of metal tube mills. Combustion synthesis chemical reaction in a negative-pressure casting type die cavity can be utilized; a TiC porcelain-metal enhancing area with the thickness of 15-20 mm is formed at the nasal part at the front edge of the top; and the combination between the porcelain-metal enhancing area and the top is metallurgy combination. The technology is as follows: firstly, Ti powder, C powder and Ni powder are used as reactants, are evenly mixed according to certain proportion and are pressed into blank material; secondly, the pressed blank material after degasification is positioned at a corresponding position of the top needing enhancement in the negative-pressure casting type die cavity, and vacuum suction of a negative-pressure sand box is kept; high-temperature and hot-made mould steel liquid is poured into casting mould to ignite the chemical reaction in the pressed blank material to form TiC porcelain granules so as to prepare roughcast of the top casting; and thirdly, the roughcast of the top casting is performed with mechanical process of turning or grinding and the like so as to achieve the designing size requirement of the top.

Description

technical field [0001] The invention belongs to the application field of metal pipe rolling mills in the metallurgical industry, and in particular relates to a ceramic particle locally reinforced composite material for the plug of a seamless steel pipe mill and a preparation method thereof. Background technique [0002] In the production process of seamless steel pipes, the pipe piercing machine head is an important thermal processing die. Because the plug needs to withstand high temperature thermal shock and cyclic extrusion force during service, its service life is short. At present, special heat treatment measures are generally adopted for the plug in production to form a surface hardening layer and an anti-oxidation layer. Under the action of cyclic high temperature and repeated extrusion force, the main failure forms of the plug surface are surface scale peeling, nose collapse, longitudinal cracking, and steel pipe bonding, etc., which seriously affect the service life...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B25/00B23P15/00C22C1/10
Inventor 姜启川王慧远王金国杨亚锋陈卫东国鸽
Owner JILIN UNIV
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