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High-temperature-resistance and creep-resistance high-manganese stainless steel pump valve casting and manufacturing method thereof

A kind of stainless steel pump, anti-creep technology, applied in variable capacity pump parts, parts of pumping devices for elastic fluids, pump components, etc., can solve the problems of uneven performance and high requirements of pump valve alloy steel , to achieve the effect of improving purity, improving wear resistance and high efficiency

Inactive Publication Date: 2016-03-30
TONGLING JINGWEI FLUID SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] The weight percent of each component in the stainless steel casting of this example is: Cr: 10%, Mn: 12%, Ni: 0.5%, Mg: 1.0%, Sb: 0.4%, N: 0.08%, Si: 0.2%, V : 0.4%, Sr: 0.8%, S<0.03%, P<0.03%, C: 0.25%, refining agent 0.3%, the balance is Fe and unavoidable impurities.

[0013] Wherein the refining agent is made of the following raw materials by weight percentage: honeycomb ceramic powder 5, graphene 0.1, absolute ethanol 10, Ca content of 75wt.% Al-Ca master alloy powder 5, RE content of 10wt.% Al-RE Master alloy powder 3, stearic acid 1, the preparation method of this refining agent is: first put Al-Ca master alloy powder and Al-RE master alloy powder into the ball mill pot, stir and mix evenly, add absolute ethanol, stearin Acid and graphene were ball milled and mixed for 2 hours under airtight conditions. After the ball milling, honeycomb ceramic powder was added, and the milling was continued for 20 minutes. After the milling, the mixed material was taken out, dri...

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Abstract

The invention discloses a high-temperature-resistance and creep-resistance high-manganese stainless steel pump valve casting. The use number of elements such as Mn, Mg and V is properly increased for the stainless steel casting on the basis that low-carbon steel has good toughness and plasticity, and stainless steel casting materials have high strength and hardness; grains in the materials are small, good high-temperature strength and creep resistance are achieved, and the wear resistance property is improved; an added composite refining agent of nanocrystallization Ca-RE intermediate alloy powder and graphene which are loaded by honeycomb ceramic powder is scattered more evenly in molten steel, high thermal stability is achieved, the impurity removing and slag melting efficiency is higher, 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 is stable in performance and durable, and energy-saving and efficiency production effects are achieved.

Description

technical field [0001] The invention relates to the technical field of stainless steel castings, in particular to a high-manganese high-manganese stainless steel pump valve casting with high temperature resistance and creep resistance 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...

Claims

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Application Information

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IPC IPC(8): C22C38/58C22C38/46C22C38/60C22C33/04C21D6/00C21D1/18F04B53/10
CPCC22C38/58C21D1/18C21D6/004C22C33/04C22C38/001C22C38/002C22C38/46C22C38/60F04B53/108F05C2201/046
Inventor 吴寿涛
Owner TONGLING JINGWEI FLUID SCI & TECH