High-strength high-carbon steel material for pump bearings and preparation method thereof
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A high-strength, high-carbon steel technology, applied in the field of metal material preparation, can solve problems such as high requirements and harshness, achieve stable and uniform quality, improve yield, and reduce inclusion oxides
Inactive Publication Date: 2014-03-26
安徽省智汇电气技术有限公司
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[0002]Pumps and valves work in various and harsh environments, and have high requirements for materials. At present, there are many kinds of alloy steels used for pumps and valves, and the technology has made great progress, but There are still many problems, such as wear resistance, hardness, antirust performance, corrosion resistance, high and low temperature resistance, brittleness, toughness, etc., which cannot meet the production requirements in many occasions, and further improvement is needed to increase production efficiency. , reduce costs, improve safety, provide guarantee for the development of high-precision technology, and provide impetus for social development, the task is still very arduous
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[0013] A high-strength high-carbon steel material for pump bearings, which contains chemical element components and mass percentages: carbon 1.2-1.4, silicon 0.7-0.9, manganese 0.8-1.1, chromium 2.3-2.5, vanadium 0.4-0.7, molybdenum 0.1-0.2, niobium 0.04-0.06, Pr0.02-0.04, S≤0.04, P≤0.04, the balance is iron.
[0014] The production method of the high-strength high-carbon steel material used for the pump bearing is:
[0015] (1) Prepare pig iron and scrap iron as the source of iron matrix at a ratio of 1:0.7, put pig iron into the furnace for melting, desulfurize, deoxidize, use refining agent for one-time refining, add alloy components for alloying, and then add scrap iron to melt , adding refining agent for secondary refining, testing and adjusting the content of chemical elements to pass, casting, post-casting heat treatment, etc.;
[0016] (2) The batch order of alloying elements into the furnace during the alloying process is: (1) silicon, manganese; (2) chromium, Pr; (3...
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Abstract
The invention relates to a high-strength high-carbon steel material for pump bearings, which contains the following chemical components in percentage by mass: 1.2-1.4% of carbon, 0.7-0.9% of silicon, 0.8-1.1% of manganese, 2.3-2.5% of chromium, 0.4-0.7% of vanadium, 0.1-0.2% of molybdenum, 0.04-0.06% of niobium, 0.02-0.04% of Pr, at most 0.04% of S, at most 0.04% of P and the balance of iron. By adding the vanadium, niobium, molybdenum and other elements on the basis of high-carbon steel, the obtained alloy steel has the advantages of high hardness, favorable impact resistantce, favorable wear resistance, favorable toughness, high corrosion resistance and high temperature resistance, is suitable for pump bearings and other load-bearing high-abrasion parts, and can not be easily damaged. Part of scrap iron is used as the raw material, and secondary refining is performed, so that the product quality is more stable and uniform. When the refining agent is used for casting production, the yield is obviously enhanced, the porosity in the casting is lowered by 1-2 degrees, and the oxide inclusion content is obviously lowered by 2 levels or so.
Description
technical field [0001] The invention relates to the field of metal material preparation, in particular to a high-strength high-carbon steel material for pump bearings and a preparation method thereof. Background technique [0002] The working environment of pump valves is diverse and harsh, and the requirements for materials are very high. At present, there are many kinds of alloy steel used in pump valves, and the technology has made great progress, but there are still many problems, such as wear resistance, hardness, rust resistance Performance, corrosion resistance, high and low temperature resistance, brittleness, toughness, etc., cannot meet the production requirements in many occasions, and further improvement is needed to improve production efficiency, reduce costs, and improve safety. Guaranteeing and providing impetus for social development are still arduous tasks. Contents of the invention [0003] The object of the present invention is to provide a high-strengt...
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