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Body of analytic a powerful person is commonly used material and the heat treatm
From;    Author:Stand originally
The material sort of body of a powerful person is various, apply to all sorts of different operating mode.
The commonly used material of body of a powerful person has 9 kinds as follows:
1. Casting pig, apply to working temperature to be in - between 15~ 200 ℃ , the low-pressure valve of 1.6MPa of ≤ of nominal pressure PN.
2. Black heart malleable iron, apply to working temperature to be in - between 15~ 250 ℃ , of 2.5MPa of ≤ of nominal pressure PN in low-pressure valve.
3. Nodular cast iron, apply to working temperature to be in - between 30~ 350 ℃ , of 4.0MPa of ≤ of nominal pressure PN in low-pressure valve.
4. Carbon steel (WCA, WCB, WCC) , apply to working temperature to be in - the valve of medium, high pressure between 29~ 425 ℃ , among them temperature of job of 16Mn, 30Mn is - between 40~ 450 ℃ , commonly used will replace ASTMA105.
5. Microtherm carbon steel (LCB) , apply to working temperature to be in - the microtherm valve valve between 46~ 345 ℃ .
6. Alloy steel (WC6, WC9) , apply to working temperature to be in - the valve of is not caustic medium high temperature high pressure between 29~ 595 ℃ ; WC5, WC12 applies to working temperature to be in - the valve of high temperature high pressure of the caustic medium between 29~ 650 ℃ .
7. Austenite stainless steel, apply to working temperature to be in - the valve of the caustic medium between 196~ 600 ℃ .
8. Cheat like this alloy, basically apply to the valve of medium of the fluorine that contain hydrogen.
9. Casting copper alloy, basically apply to working temperature to be in - the aerobic pipeline between 273~ 200 ℃ uses valve.
What lift with the above-listed is body of a powerful person in commonly used material kinds big, specific in every kinds of material, have a lot of different names again, all sorts of different names apply to all sorts of different pressure grade again. Accordingly, when the material of body of a powerful person that chooses valve, should mix according to different utility different pressure grade, agree with certainly the data of body of a powerful person that operating mode needs.
In addition, material of body of a powerful person still has titanium alloy (titanium a powerful person) , aluminium alloy (aluminous a powerful person) ; Plastic (plastic a powerful person) ; Pottery and porcelain (a powerful person of pottery and porcelain) etc.
Craft of heat treatment of semifinished product of system of a powerful person is as follows respectively by different material:
1. The heat treatment with grey cast-iron mouth.
To achieve different goal, grey mouth is cast-iron the heat treatment that can have differring after cast. The heat treatment technology that the body of cast-iron to grey mouth a powerful person spare parts in valve production often chooses after cast has: The hot effectiveness for a given period of time that eliminates casting stress and the high temperature anneal that eliminate free cementite. Hot effectiveness for a given period of time is must a working procedure. High temperature anneal is mixed as a result of chemical composition when cast only cast cooling rate control is undeserved, the ability when cementite is born at the beginning of the existence in creating the organization after casting replaces hot effectiveness for a given period of time with it.
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