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Subject: Re: Time to prepare A 216 gr. WCB steel

Date: 03/15/03 at 3:31 PM
Posted by: Aguinaldo Gonsalez
E-mail: gui.pg@ig.com.br
Message Posted:

In Reply to: Time to prepare A 216 gr. WCB steel posted by igor mariani on 10/17/02 at 4:57 PM:

Dear Mr Igor

usually my practice to make WCB in arc furnace

- My method is one slag process them the dessulfurization is not good.
- Charge scraps or returns no restrictions to observe the P and S
- use CaCo3 , if you use CaO it is very dry.
- in 1550C I remove the Slag and prepareother slag.to accert the carbon content to 0,30 a 0,40 hiher than aim carbon.
- To blw oxigen 3 a 5 minutes
- Chemical analysis
- To block the melting with FeSi 75
- To acert the chemical analysis c 0,28 - 0,30
Mn 0,80 1,0
- Temperature 1620 a 1660 in furnace
temeprature in laddle 1580 a 1620C
Deoxidaxion 3 kgs/ ton de CaSi and 1 Kg/ton de Al
In thickness more than 50 mm i use FeSiZr 0,06 a 0,1 Zr

Observe the slag can not white preference brown

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