Promotion Opportunity & Gaussmeter
Last night, my boss asked me do we support him if he want to be the Head of Engineering. Oh god! There is no other choice to answer such question. What I can do is to tell him that I really think he is the one of most suitable candidates for the post. I think he was not satisfied with this answer and walked away with a laugh.
My boss is a young & smart guy. He always wants to climb up the management ladder. But I feel that our Director doesn't like him because sometimes he is too tough and intolerable. This may be the character of an inspection personnel who always believes that he is correct and everyone should respects his decision. Well, I don't think he can get the post but I think he will try. I talked with Big C this morning and both of us hope that we won't be involved in this promotion game.
Today, Bryan asked me how can we determine the field strength when doing MT. I told him the best way is to use a hall-effect probe gaussmeter because he can just directly read the data from the gaussmeter. An hour later, he came to me and said that our MT machine does not have enough strength. He then said he measured about 58G. But in ENISO9934-1, the strength should be 1T and, as T=10,000G, our MT machine is very weak. I was puzzled.
I went straight to the library and at last found out that in ENISO9934-1, 1T is the flux density and tangential field strength should be 2kA/m. Hall-effect probe gaussmeter is used to measure tangential field but not flux density.
Normally, when conducting MT, the tangential field strength should be about 30G to 60G which is 2.4kA/m to 4.8kA/m. If the magnetization is too high, spurious background indications may appear. Also when using a Gaussmeter, we must be very careful to do with a correct probe positioning. The probe must be perpendicular to the surface of the part at the location of measurement to within 5 deg.
I told Bryan all these but I don't think he understood what I was saying. He just said that he was ok with the result if the range is from 30 to 60. I really don't want to work with him. He should appreciate my effort and thank me for helping him.
My boss is a young & smart guy. He always wants to climb up the management ladder. But I feel that our Director doesn't like him because sometimes he is too tough and intolerable. This may be the character of an inspection personnel who always believes that he is correct and everyone should respects his decision. Well, I don't think he can get the post but I think he will try. I talked with Big C this morning and both of us hope that we won't be involved in this promotion game.
Today, Bryan asked me how can we determine the field strength when doing MT. I told him the best way is to use a hall-effect probe gaussmeter because he can just directly read the data from the gaussmeter. An hour later, he came to me and said that our MT machine does not have enough strength. He then said he measured about 58G. But in ENISO9934-1, the strength should be 1T and, as T=10,000G, our MT machine is very weak. I was puzzled.
I went straight to the library and at last found out that in ENISO9934-1, 1T is the flux density and tangential field strength should be 2kA/m. Hall-effect probe gaussmeter is used to measure tangential field but not flux density.
Normally, when conducting MT, the tangential field strength should be about 30G to 60G which is 2.4kA/m to 4.8kA/m. If the magnetization is too high, spurious background indications may appear. Also when using a Gaussmeter, we must be very careful to do with a correct probe positioning. The probe must be perpendicular to the surface of the part at the location of measurement to within 5 deg.
I told Bryan all these but I don't think he understood what I was saying. He just said that he was ok with the result if the range is from 30 to 60. I really don't want to work with him. He should appreciate my effort and thank me for helping him.
Labels: MT Knowledge, My Work, Techanical
posted by Backgouging at
6:08 PM
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