SU494677A1 - The method of sample preparation for carrying out express control of carbon content in steel - Google Patents
The method of sample preparation for carrying out express control of carbon content in steelInfo
- Publication number
- SU494677A1 SU494677A1 SU1960929A SU1960929A SU494677A1 SU 494677 A1 SU494677 A1 SU 494677A1 SU 1960929 A SU1960929 A SU 1960929A SU 1960929 A SU1960929 A SU 1960929A SU 494677 A1 SU494677 A1 SU 494677A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- steel
- carbon content
- carrying
- sample preparation
- out express
- Prior art date
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- Investigating And Analyzing Materials By Characteristic Methods (AREA)
Description
1one
Изобретение относитс к способам физико-химического анализа металлов и сплавов.This invention relates to methods for physicochemical analysis of metals and alloys.
Известен способ контрол стали в гор чекатаном состо нии, основанный на св зи между содержанием углерода и коэрцитивной силой. Контроль проводитс после разливки стали, что снижает точность определени .A known method of controlling steel in a hot-rolled state is based on the relationship between carbon content and coercive force. The control is carried out after casting steel, which reduces the accuracy of the determination.
С целью повышени точности анализа ,согласно предложенному способу,пробы отливают в изложницу и по измерению их коэрцитивной силы определ ют содержание углерода в плавках перед разливкой .In order to increase the accuracy of the analysis, according to the proposed method, the samples are cast into a mold and, by measuring their coercive force, the carbon content in the melts before casting is determined.
Коэрцитивна сила стали зависит не только от содержани углерода, но и от ее структуры (размера зерна, характера перлита и т.д.). Посто нство Характера структуры может быть обеспечено подбором скорости охлаждени в интервалах критических температур. Эта скорость в интервале Atj - А; не должна превышать 5 в секунду. Необходима регулировка зависит от материала и массы изложницы и размера образца. Изложница может быть изготовлена из графита, молибдена, стали. Примерные размеры пробы: ширина 2,5 см, толщина 2 см, длина 10 см при отливке в изложницу с горизонтальным гнездом.The coercive force of steel depends not only on the carbon content, but also on its structure (grain size, nature of perlite, etc.). The constancy of the nature of the structure can be ensured by the selection of the cooling rate in the intervals of critical temperatures. This speed is in the interval Atj - A; should not exceed 5 per second. The adjustment required depends on the material and weight of the mold and the size of the sample. The mold can be made of graphite, molybdenum, steel. Approximate sample sizes: width 2.5 cm, thickness 2 cm, length 10 cm when casting into a mold with a horizontal socket.
Залитую пробу песле охлаждени в изложнице до критической температуры Кч () можно дл убыстрени ее подготовки охладить до окончательной температуры (15-40°С) ускоренно, например , в воде.The flooded sample of the peel cooling in the mold to the critical temperature Kc () can be accelerated to the final temperature (15-40 ° C) accelerated, for example, in water to speed up its preparation.
Охлажденный образец перед измерением намагничивают в замкнутом рме, ватам измер ют коэрцитивную силу в раз-Before the measurement, the cooled sample is magnetized in a closed chamber, the coercive force is measured in the cotton
магничивающей катушке по методу одергивани измерительной катушки или по методуинтегрировани сигнала флюксиетроы .the magnet coil according to the method of withdrawing the measuring coil or according to the method of integrating the signal fluxieroty.
В последнем Случае коэрцитиыетр расчлен ют на две части - блок с источником хока и измерительными приборами, устанавливаемый в лаборатории, и датчик , состо щий из размагничивающей и измерительной катушек, монтируемый на производственном участке. Обе части соедин ют экранированным кабелем. При такой системе отпадает надобность до .стйвл ть образец в лабораторию.In the latter case, the coercitimeter is dissected into two parts - a unit with a hok source and measuring instruments, installed in the laboratory, and a sensor consisting of a demagnetizing and measuring coils, mounted at the production site. Both parts are connected by shielded cable. With such a system, there is no need to take the sample to the laboratory.
4 Предмет изобретени 4 Subject of the invention
Способ подготовки образца дл проведени экспресс-контрол содержани углерода в стали путем измерени коэрцитивной силы, отличающийс тем, что, с цель повышени точности анализа , в излокницу отливают пробный образец , охлаждают его до 600°С со скоростью не более 5°С в секунду в интервале 600-900°С и с произвольной скоростью охлаждают его с 600°С до 15ад°с .A sample preparation method for carrying out express control of the carbon content in steel by measuring the coercive force, characterized in that, with the aim of improving the accuracy of the analysis, a test sample is cast into the cell and cooled to 600 ° C at a rate not exceeding 5 ° C per second in the range of 600–900 ° C and at an arbitrary rate it is cooled from 600 ° C to 15 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1960929A SU494677A1 (en) | 1973-10-01 | 1973-10-01 | The method of sample preparation for carrying out express control of carbon content in steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1960929A SU494677A1 (en) | 1973-10-01 | 1973-10-01 | The method of sample preparation for carrying out express control of carbon content in steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU494677A1 true SU494677A1 (en) | 1975-12-05 |
Family
ID=20564996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU1960929A SU494677A1 (en) | 1973-10-01 | 1973-10-01 | The method of sample preparation for carrying out express control of carbon content in steel |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU494677A1 (en) |
-
1973
- 1973-10-01 SU SU1960929A patent/SU494677A1/en active
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