High-strength, rustproof and corrosion-resistance stainless steel pump valve casting and manufacturing method thereof

Abstract

The invention discloses a high-strength, rustproof and corrosion-resistance stainless steel pump valve casting. The use number of elements such as CU, Nd and Zr is properly increased for the stainless steel casting on the basis that low-carbon steel has good toughness and plasticity, higher strength and hardness are achieved on casting materials, plasticity is better, the age hardening effect is good, and good rustproof and corrosion-resistance performance is achieved; a refining agent added in the casting process is used for conducting nanocrystallization on intermediate alloy powder and adsorbed in honeycomb ceramic powder and is dispersed more evenly in molten steel; the impurity removing and slag melting speed is high, efficiency is high, purity of the molten steel can be effectively improved, and the quality of the casting is improved; and stainless steel obtained after multiple times of thermal treatment can meet the requirements for complex structure features and variable use environments of a pump valve, and energy-saving and efficiemt production effects are achieved on products.

Description

technical field [0001] The invention relates to the technical field of stainless steel castings, in particular to a high-strength anti-rust and corrosion-resistant stainless steel pump valve casting and a preparation method thereof. Background technique [0002] Stainless steel pumps and valves are widely used in chemical, petrochemical, petroleum, papermaking, mining, electric power, liquefied gas, food, pharmaceutical, water supply and drainage, municipal, mechanical equipment, electronic industry, urban construction and other fields. The pump is a component that transports various media, and the valve is a control component in the pipeline fluid delivery system. It is used to change the passage section and the flow direction of the medium. Functions such as overflow and pressure relief, the two are often used together. [0003] Since stainless steel pumps and valves are exposed to a variety of media, which may be water, steam, oil, gas, mud, various corrosive media, liqu...

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Problems solved by technology

[0003] Since stainless steel pumps and valves are exposed to a variety of media, such as water, steam, oil, gas, mud, various corrosive media, liquid metal and radioactive fluids, etc., the performance requirements for pump and valve materials are relatively high. At present, the properties of pump and valve alloy steel on the market are uneven, which is far from meeting the production demand. It is urgent to start from the process and formula to obtain more high-quality and efficient stainless steel materials.