JPS5655512A - Method and apparatus for rapid decision of graphite vermiculation degree of molten cast iron - Google Patents
Method and apparatus for rapid decision of graphite vermiculation degree of molten cast ironInfo
- Publication number
- JPS5655512A JPS5655512A JP13119279A JP13119279A JPS5655512A JP S5655512 A JPS5655512 A JP S5655512A JP 13119279 A JP13119279 A JP 13119279A JP 13119279 A JP13119279 A JP 13119279A JP S5655512 A JPS5655512 A JP S5655512A
- Authority
- JP
- Japan
- Prior art keywords
- degree
- graphite
- vermiculation
- cooling
- cast iron
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
PURPOSE: To rapidly decide the degree of graphite vermiculation by thermoanalytically measuring the relations between the temperatures and time of cooling and solidifying process and obtaining said degree by substituting the three parameters having a close correlation with the graphite vermiculation degree of cast iron into the equation obtd. from experimental examples.
CONSTITUTION: The equation I which gives a degree of vermiculation DV is decided by the lowest temp. TEU due to the supercooling caused by the solidification of eutectic during the cooling and solidifying stage under a prescribed condition with respect to a molten sample of vermicular graphite cast iron, the lowest temp. TPU due to the supercooling caused by the eutectoid transformation during the progress of cooling and solidification, the highest temp. TPM at the recalescence which occurs subsequently and constants (a), (b) and (c), wherein (a), (b) and (c) are decided by one among the rate of graphite spheroidization, the amt. of residual Mg, the ratio of residual Mg to Ti, tensile strength, and elongation. Here, the numerical values of TEU, TPU, TPM under the above-described predetermined cooling conditions of an unknown sample are substituted into the relational expression, whereby the characteristic value DV for decision of the degree of graphite vermiculation is obtained.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13119279A JPS5655512A (en) | 1979-10-11 | 1979-10-11 | Method and apparatus for rapid decision of graphite vermiculation degree of molten cast iron |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13119279A JPS5655512A (en) | 1979-10-11 | 1979-10-11 | Method and apparatus for rapid decision of graphite vermiculation degree of molten cast iron |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5655512A true JPS5655512A (en) | 1981-05-16 |
JPS63484B2 JPS63484B2 (en) | 1988-01-07 |
Family
ID=15052165
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13119279A Granted JPS5655512A (en) | 1979-10-11 | 1979-10-11 | Method and apparatus for rapid decision of graphite vermiculation degree of molten cast iron |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5655512A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57203708A (en) * | 1981-06-11 | 1982-12-14 | Asahi Malleable Iron Co Ltd | Production of compacted vermicular cast iron |
CN111398341A (en) * | 2020-04-13 | 2020-07-10 | 哈尔滨理工大学 | Multi-characteristic-point thermal analysis evaluation method for vermicular cast iron vermicular effect |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8751169B1 (en) * | 2010-09-29 | 2014-06-10 | The United States of America, as represented by the Secretary of the Department of the Interior | Spectral method for determining the source of expanded vermiculite insulation in attics and walls |
-
1979
- 1979-10-11 JP JP13119279A patent/JPS5655512A/en active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57203708A (en) * | 1981-06-11 | 1982-12-14 | Asahi Malleable Iron Co Ltd | Production of compacted vermicular cast iron |
JPH0258323B2 (en) * | 1981-06-11 | 1990-12-07 | Asahi Malleable Iron Co Ltd | |
CN111398341A (en) * | 2020-04-13 | 2020-07-10 | 哈尔滨理工大学 | Multi-characteristic-point thermal analysis evaluation method for vermicular cast iron vermicular effect |
Also Published As
Publication number | Publication date |
---|---|
JPS63484B2 (en) | 1988-01-07 |
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