Unlock instant, AI-driven research and patent intelligence for your innovation.
Casting process of a carbon steel valve
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A casting process and valve technology, which is applied in the field of foundry industry, can solve the problems of casting shrinkage cavity and high phosphorus content in pouring liquid, and achieve the effects of good wear resistance and sealing performance, low phosphorus content, and reducing gas sources
Inactive Publication Date: 2016-07-06
FUJIAN NANAN HENGJUN CASTING CO LTD
View PDF12 Cites 1 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
The application number is 201210186985.2 "A Casting Method for a Butterfly Valve Core" discloses a casting method for a butterfly valve core. The method has a reasonable raw material formula and a simple process. However, due to the high phosphorus content in the pouring liquid, it is easy to cause shrinkage hole
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0022] In this embodiment, a casting process of a carbon steel valve includes the following steps:
[0023] (1) Mold making: Wooden molds are made according to the shape of carbon steel valves, and risers and gates are set on the wooden molds;
[0024] (2) Molding sand molding: make a sand mold with molding sand around the wooden mold, take out the wooden mold, and coat a layer of high-temperature resistant coating in the sand mold; the mold sand is counted in parts by weight, including 2 parts of water glass, 90 parts of quartz sand, B 11 parts of diol diacetate and 9 parts of clay, the high-temperature-resistant coating includes 20 parts of borax, 30 parts of quartz sand, 15 parts of coke, 6 parts of silane coupling agent, 10 parts of polyethylene and water in parts by weight. 70 copies;
[0025] (3) Molten steel melting: put scrap steel in a three-phase electric arc furnace, raise the temperature to 1600°C, transfer to a decarburization furnace, add lime, then feed oxygen,...
Embodiment 2
[0032] A kind of molding sand for casting, a kind of casting technology of carbon steel valve, comprises the following several steps:
[0033] (1) Mold making: Wooden molds are made according to the shape of carbon steel valves, and risers and gates are set on the wooden molds;
[0034] (2) Molding sand molding: make a sand mold with molding sand around the wooden mold, take out the wooden mold, and coat a layer of high-temperature resistant coating in the sand mold; the mold sand is calculated in parts by weight, including 3 parts of water glass, 80 parts of quartz sand, B 18 parts of diol diacetate and 5 parts of clay, the high-temperature-resistant coating includes 30 parts of borax, 20 parts of quartz sand, 30 parts of coke, 3 parts of silane coupling agent, 16 parts of polyethylene and water in parts by weight. 50 copies;
[0035] (3) Molten steel smelting: put scrap steel in a three-phase electric arc furnace, raise the temperature to 1620°C, transfer to a decarburizati...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Login to View More
Abstract
The invention discloses a carbon steel valve casting process. The process includes the following steps: (1) according to the shape of a valve, a wood die is produced, and the wood die is provided with a riser and a pouring gate; (2) a sand mould is formed around the wood die by use of moulding sand, the wood die is taken out, and the sand mould is internally coated with a high temperature resistant coating; (3) scrap steel is put in a three-phase electric arc furnace for heating, and then transferred into a decarburization furnace, lime is added, oxygen is led in for dephosphorization and desulfurization, and aluminum and ferromanganese are added to obtain molten steel; (4) the molten steel is poured, and (5) after cooling, the valve surface and sand residue are cleaned to obtain a carbon steel valve. The preparation method is simple, the pouring temperature is proper, valve sticking sand and shakeout phenomena are greatly reduced, the valve cracks, pores and other defects can be eliminated, the valve's hardness is improved, wear resistance and sealing performance are good, and the valve service life is prolonged.
Description
technical field [0001] The invention relates to a casting process of a carbon steel valve, which belongs to the technical field of casting industry. Background technique [0002] The valve is a control component in the fluid delivery system, which has functions such as cut-off, adjustment, flow diversion, reverse flow prevention, pressure stabilization, flow diversion or overflow pressure relief. Valves are divided into cast iron valves, cast steel valves, stainless steel valves, chrome molybdenum steel valves, chrome molybdenum vanadium steel valves, duplex steel valves, plastic valves, non-standard custom valves and other valve materials according to the material. [0003] At present, in the steel casting industry, when casting steel castings, it is usually necessary to manufacture molds, cast and then carry out post-processing of valves. Improper treatment will easily cause defects such as cracks, blisters, and pores in the steel castings obtained, which affects product q...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More