Proceedings of the Indiana Academy of Science
Proceedings of the Indiana Academy of Science
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In our eReader you can find the full English version of the book. Read Proceedings of the Indiana Academy of Science Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Proceedings of the Indiana Academy of Science
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Here again the extent to which the phosphorus had penetrated into the steel is marked by a zone of cementite. This was heated at 900 for two hours.
The other steel inserts containing manganese, copper, chromium, titanium, and sulphur showed this tendency to cause cementite segrega- tion to only a very limited extent or not at all.
Figure 2, c and c?, respectively, show the specimens containing alumel and copel inserts. Cementite has collected about the insert in both cases. These specimens were... etched with sodium picrate which causes cementite to appear dark.
From the results of these few experiments it would seem that inclusions in hyper-eutectoid steel must have a certain slight solubility in the austenite at high temperatures, and that the concentration of the dissolved matter is therefore greatest in the immediate vicinity of the inclusion. Such a condition of localized dissolved impurities prob- ably has the effect of starting cementite crystallization first about the inclusion, thus breaking down the state of cementite supersaturation that always occurs in hyper-eutectoid steel cooling through the critical range.
What to read after Proceedings of the Indiana Academy of Science?
You can find similar books in the "Read Also" column, or choose other free books by Indiana Academy of Science to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Here again the extent to which the phosphorus had penetrated into the steel is marked by a zone of cementite. This was heated at 900 for two hours.
The other steel inserts containing manganese, copper, chromium, titanium, and sulphur showed this tendency to cause cementite segrega- tion to only a very limited extent or not at all.
Figure 2, c and c?, respectively, show the specimens containing alumel and copel inserts. Cementite has collected about the insert in both cases. These specimens were... etched with sodium picrate which causes cementite to appear dark.
From the results of these few experiments it would seem that inclusions in hyper-eutectoid steel must have a certain slight solubility in the austenite at high temperatures, and that the concentration of the dissolved matter is therefore greatest in the immediate vicinity of the inclusion. Such a condition of localized dissolved impurities prob- ably has the effect of starting cementite crystallization first about the inclusion, thus breaking down the state of cementite supersaturation that always occurs in hyper-eutectoid steel cooling through the critical range.
What to read after Proceedings of the Indiana Academy of Science?
You can find similar books in the "Read Also" column, or choose other free books by Indiana Academy of Science to read onlineMoreLess
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