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Method for manufacturing rollers by using high-speed steel

A high-speed steel and roll technology, which is applied in the field of high-speed steel roll production, can solve the problems of high proportion of production cost, and achieve the effects of good thermal fatigue resistance, fine structure, high strength and toughness

Inactive Publication Date: 2013-02-20
湖州市银鑫轧辊有限公司
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

If factors such as production downtime, production reduction and equipment maintenance increase due to roll consumption are considered, the proportion of production costs will be higher

Method used

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Embodiment

[0018] A method for making rolls from high-speed steel, comprising the following process steps:

[0019] 1) Mix ordinary steel scrap, pig iron, ferrotungsten, ferromolybdenum, ferrovanadium, ferrochrome, ferroniobium, ferrotitanium, nickel plate and metal cobalt in an electric furnace for heating and melting;

[0020] 2) After adjusting the ingredients in front of the furnace, raise the temperature to 1580°C-1630°C, add 0.3%-0.8% of Al to the weight of molten steel for deoxidation and alloying, and then leave the furnace; crush the modifier and cerium-based rare earth magnesium alloy to a particle size smaller than Small pieces of 15mm, after being dried below 200°C, are placed at the bottom of the ladle, and the molten steel is subjected to compound modification treatment by the method of pouring into the ladle;

[0021] 3) Use gray iron or nodular iron casting, preheat to 230°C-240°C and then paint the inner surface with refractory paint with a thickness of 0.8-1.2mm, dry th...

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Abstract

The invention relates to a method for manufacturing rollers by using high-speed steel. The method includes processing steps that ordinary metals are mixed according to a ratio and added into an electric furnace to be heated and molten; ingredients are regulated up to standard before being put into the furnace and heated to 1580 DEG C to 1630 DEG C, and Al deoxidation and alloying accounting for 0.3% to 0.8% of molten steel is added; gray iron or ductile iron is used for casting, the gray iron or ductile iron is preheated to 230 DEG C to 240 DEG C, and fireproof paints are coated on the inner surface; the temperature of the molten iron is adjusted to 1510 DEG C to 1550 DEG C, and a centrifugal machine is started; an annealing process is that casting blanks are heated to 700 DEG C to 750 DEG C along with a heat treatment furnace with a temperature no less than 200 DEG C; and quenching is performed after rough machining. According to the method, manufactured rollers are fine and uniform in structure, high in strength and toughness and good in thermal fatigue resistance; and cracks, stripping and roller crushing during the usage of the rollers cannot occur.

Description

technical field [0001] The invention relates to a method for making rolls with high-speed steel. Background technique [0002] Rolls are one of the main spare parts consumed in steel rolling production, and the consumption of rolls is about 5% to 15% of the cost of steel rolling production. If factors such as production downtime, reduced production and increased equipment maintenance due to roll consumption are considered, the proportion of production costs will be even higher. The quality of the roll is not only related to the cost of rolling steel production and the production rate of the rolling mill, but also affects the quality of the rolled material to a large extent. With the development of steel rolling technology, the speed and automation of rolling mills have been continuously improved, and higher requirements have been put forward for the quality of rolls, especially the wear resistance, strength and toughness of rolls. In recent years, due to the special demand...

Claims

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Application Information

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IPC IPC(8): C22C37/10B22D13/02C21D9/38C23C8/28
Inventor 黄金荣范银芳
Owner 湖州市银鑫轧辊有限公司
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