Novel corrosion resistant, wear resistant and high temperature resistant alloy material and production process thereof

A technology of high temperature resistant alloy and production process, applied in the field of stainless acid resistant steel and its production, can solve the problems of poor fatigue resistance, weak anti-wear performance, low high temperature strength, etc., to reduce product cost, improve hardness, improve The effect of mechanical properties

Inactive Publication Date: 2011-01-12
沈绍敖 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Low high temperature strength and low hard bottom (HRC25~28)
[0005]2. Poor f

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 1. Ingredients

[0053] First, 680kg of 1Cr18Ni9Ti stainless steel is used as the base material, and then 220kg of medium-carbon ferrochrome is added, and then 50kg of ferromolybdenum, 15kg of ferro-titanium, 25kg of ferro-niobium, 5kg of ferro-boron, and 5kg of rare earth are added.

[0054] 2. Melting is carried out in a thyristor intermediate frequency induction furnace, using the non-oxidizing method, the melting temperature is 1600-1680°C, the melting time is 2-3 hours per furnace, and the tapping temperature is 1500-1550°C.

[0055] 3. The casting is cast by sand molding process.

[0056] 4. Heat treatment: heat the casting to 800-850°C, and perform furnace annealing.

Embodiment 2

[0058] 1. Ingredients

[0059] First, 640kg of 1Cr18Ni9Ti stainless steel is used as the base material, and then 260kg of medium-carbon ferrochrome is added, and then 40kg of ferromolybdenum, 20kg of ferro-titanium, 30kg of ferro-niobium, 5kg of ferro-boron, and 5kg of rare earth are added.

[0060] 2. The smelting process is the same as in Embodiment 1.

[0061] 3. The casting is cast by dry type and coating process.

[0062] 4. Heat treatment: Heat the casting to the solid solution temperature of 1000-1050°C, and perform furnace cooling annealing.

Embodiment 3

[0064] 1. Ingredients

[0065] First, 720kg of 1Cr18Ni9Ti stainless steel is used as the base material, and then 180kg of high-carbon ferrochrome is added, and then 60kg of ferromolybdenum, 10kg of ferro-titanium, 20kg of ferro-niobium, 5kg of ferro-boron, and 5kg of rare earth are added.

[0066] 2. The smelting process is the same as in Embodiment 1.

[0067] 3. The castings are cast by precision casting technology.

[0068] 4, heat treatment is identical with embodiment one or example two.

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PUM

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Abstract

The invention relates to a novel corrosion resistant, wear resistant and high temperature resistant alloy material and a production process thereof. The alloy comprises the following components in mass percent: 1.6-2.0% of C, 0.8-1.2% of Si, 8.0-11.0% of Mn, 24-27% of Cr, 2.0-3.0% of Mo, 5.0-7.5% of Ni, less than or equal to 1.0% of Nb, less than or equal to 1.0% of Ti, less than or equal to 0.20% of B, less than or equal to 0.10% of Re, less than or equal to 0.030% of S and less than or equal to 0.030% of P. The invention comprises the following production steps: firstly, proportioning according to the requirements of finished products for chemical components of raw materials; then, smelting in a medium-frequency induction furnace of a silicon controlled rectifier; and finally, carrying out casting and heat treatment. By using the micro-alloying technology, the invention greatly improves the mechanical property of the material, ensures the higher corrosion resistance, improves the hardness, the wear resistance, the high temperature strength and the high temperature resistance, and can be widely applied to the fields of petroleum, chemical industry, metallurgy, electric power, coal, defense industry and the like. Compared with a common stainless steel acid resistant pump, the service life of a pump product produced by the invention is prolonged by more than one time, and the cost of the pump product is lowered by 1/3, thereby really realizing the purposes of excellent quality and reasonable price.

Description

technical field [0001] The invention relates to a stainless acid-resistant steel and a production method thereof. Background technique [0002] In the fields of petroleum, chemical industry, metallurgy, electric power, coal and national defense industries, a large number of industrial pumps, valves, pipelines, sugar dispersers, mixers, crackers, radiant tubes and other products are widely used. These products are often used under harsh working conditions. During operation, some are in contact with strong corrosive compounds such as dilute sulfuric acid, hydrochloric acid, phosphoric acid, hydrogen oxyacid, etc., some are working in a high-wear state, and some are in a high-temperature and high-corrosion environment. Only the above-mentioned six major industrial fields will produce hundreds of millions of tons of petroleum, tens of millions of tons of sulfuric acid, hydrochloric acid, phosphoric acid, various fertilizers and chemical raw materials every year, and will consume...

Claims

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Application Information

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IPC IPC(8): C22C38/58C22C33/06
Inventor 沈绍敖周和平
Owner 沈绍敖
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