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Low-cost anti-decarburization coating material for heavy rail steel and its application

A coating material and low-cost technology, applied in the direction of coating, etc., can solve the problems of increased production cost of heavy rail products, reduced coating compactness, and coating failure, so as to reduce production costs, reduce preparation costs, and ensure long-term stable effect

Active Publication Date: 2019-01-01
HBIS COMPANY LIMITED HANDAN BRANCH COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are still some problems in the composition of many kinds of anti-decarburization coatings: 1. The formulas all contain high content of oxides of precious metals such as Zr, Y, Ti, K, etc. Although these oxides can effectively adjust the coating 2. Although the C element added in the formula can also adjust the melting point of the coating, the CO and CO produced by the C element burning at high temperature 2 It will overflow from the formed coating melt film, which will reduce the compactness of the coating and even lead to the failure of the coating effect

Method used

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  • Low-cost anti-decarburization coating material for heavy rail steel and its application
  • Low-cost anti-decarburization coating material for heavy rail steel and its application
  • Low-cost anti-decarburization coating material for heavy rail steel and its application

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Embodiment Construction

[0022] The low-cost anti-decarburization coating material of this heavy rail steel mainly contains SiO 2 , Al 2 O 3 , B 2 O 3 , MgO, CaO, Fe 2 O 3 , Na 2 O, a total of 7 chemical components; its preparation materials are specifically: river sand (the main component is: SiO 2 , 50wt%~65wt%), pure Al 2 O 3 Powder, pure B 2 O 3 Powder, light burnt dolomite (main component: MgO 28wt%~32wt%; CaO 68wt%~72wt%), iron oxide red powder (main component: Fe 2 O 3 97wt%~98wt%), pure Na 2 O powder, LF refining slag (main ingredient: SiO 2 4wt%~18wt%; CaO 35wt%~65wt%; MgO 5wt%~15wt%; Al 2 O 3 10wt%~40wt%).

[0023] The reason why this anti-decarburization coating material contains the above-mentioned chemical components is mainly based on the action mechanism of the following components: SiO 2 It is the basic component for preparing coating materials. It can form silicon-oxygen tetrahedrons in the melt and act as a skeleton in the coating materials. It will increase the viscosity of the coating...

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Abstract

The invention discloses a low-cost decarbonization-preventing coating material for heavy rail steel and an application of the coating material. The low-cost decarbonization-preventing coating material is prepared from the following raw materials based on weight percentage: 43-52% of river sand, 8-15% of Al<2>O<3> powder, 10-15% of B<2>O<3> powder, 2-5% of light-burned dolomite, 12-17% of iron oxide red powder, 1-2% of Na<2>O powder, and 8-11% of LF refining slag. By adoption of the decarbonization-preventing coating material, occurrence of a surface decarbonization phenomenon of a heavy rail steel casting blank in a heating process can be effectively avoided for a long time, and the decarbonization layer depth on the surface of the casting blank can be lowered; after the decarbonization-preventing coating material is adopted, the surface decarbonization layer depth of the casting blank is less than or equal to 0.4mm when the heavy rail steel casting blank is heated in a heating furnace with furnace gas oxygen content of greater than or equal to 3% for 10-12h, so that related requirement of TB / T 2344-12 is satisfied; meanwhile, compared with a conventional decarbonization-preventing coating material, the manufacturing cost of the low-cost decarbonization-preventing coating material disclosed by the invention is effectively lowered; and therefore, the low-cost production of a heavy rail steel product is realized, and the production cost of each ton of steel is lowered by about 20RM averagely.

Description

Technical field [0001] The invention relates to a metal coating material, in particular to a low-cost anti-decarburization coating material for heavy rail steel. Background technique [0002] C is the main element other than Fe in heavy rail steel, and is also the main strengthening element. It can enhance the strength, hardness and wear resistance of the heavy rail. With the increase of carbon content, the strength limit, hardness and wear resistance of heavy rail steel increase rapidly. According to statistics, when the carbon content increases from 0.35% to 0.65%, the wear resistance of steel can be increased by 60%. [0003] The carbon content of heavy rail steel is usually 0.71% to 0.80%. Due to the high carbon content, the slab is more sensitive to overheating and overburning in the heating furnace, and it is prone to serious decarburization. The so-called decarburization phenomenon refers to the phenomenon that the carbon content of the surface metal is reduced or even co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D7/61
CPCC09D1/00C09D7/61
Inventor 彭兆丰许斌范佳王晓晖李玉银孙玉虎高福彬杨林浩张艳允
Owner HBIS COMPANY LIMITED HANDAN BRANCH COMPANY
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