A kind of bismuth-containing alloy steel material for pump casing and preparation method thereof
A technology of alloy steel and pump casing, which is applied in the field of bismuth-containing alloy steel materials and its preparation, can solve the problems of high requirements and harshness, and achieve the effects of long service life, low cost and improved yield
Active Publication Date: 2016-05-04
ANHUI RONGDA VALVE
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Problems solved by technology
[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
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0013] A bismuth-containing alloy steel material used for pump casings, which contains chemical element components and mass percentages: carbon 0.2-0.4, silicon 0.2-0.4, manganese 0.2-0.4, chromium 0.2-0.4, nickel 0.2-0.4, Zinc 0.2-0.4, Bi0.04-0.07, S≤0.04, P≤0.04, the balance is iron.
[0014] The production method of the described bismuth-containing alloy steel material for the pump housing is:
[0015] (1) Prepare pig iron and scrap iron as the source of iron matrix in a ratio of 1:1.5, put pig iron into the furnace for melting, perform desulfurization, deoxidation, 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, nickel; (3) ...
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Abstract
The invention relates to a bismuth-containing alloy steel material for a pump case, which contains the following chemical element components in percentage by mass: 0.2-0.4% of carbon, 0.2-0.4% of silicon, 0.2-0.4% of manganese, 0.2-0.4% of chromium, 0.2-0.4% of nickel, 0.2-0.4% of zinc, 0.04-0.07% of Bi, no more than 0.04% of S, no more than 0.04% of P and the balance of iron. According to the invention, the alloy steel formed by adding the raw materials such as bismuth, zinc, manganese and the like on the basis of low-carbon and medium-carbon steel is favorable in corrosion resistance, wear resistance, hardness and plasticity and low in cost; and part of waste iron is used as a raw material and is subjected to secondary refining, so that the quality is stabler and more uniform. According to the invention, a refining agent is used for casting production, the porosity in castings is reduced by 1-2 levels, no pore can be generated in the surfaces of the castings, the oxide inclusion is obviously reduced, and the oxide inclusion is approximately at Level 2. The alloy steel provided by the invention is used for pump cases, and is resistant to corrosion, resistant to wear, long in service life and low in cost.
Description
technical field [0001] The invention relates to the field of metal material preparation, in particular to a bismuth-containing alloy steel material used for a pump casing 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 bismuth-...
Claims
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IPC IPC(8): C22C38/40C22C33/04C21D6/00
Inventor 胡光荣
Owner ANHUI RONGDA VALVE