JPS56150156A - Preparation of free cutting steel - Google Patents
Preparation of free cutting steelInfo
- Publication number
- JPS56150156A JPS56150156A JP5394180A JP5394180A JPS56150156A JP S56150156 A JPS56150156 A JP S56150156A JP 5394180 A JP5394180 A JP 5394180A JP 5394180 A JP5394180 A JP 5394180A JP S56150156 A JPS56150156 A JP S56150156A
- Authority
- JP
- Japan
- Prior art keywords
- lead
- steel
- particle
- molten
- coagulation
- 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
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
PURPOSE: To enhance a yield of a steel ingot and added lead and, at the same time, to obtain a free cutting steel with a good quality by adding a lead particle into a molten steel along with an iron powdery particle to uniformly disperse said lead throughout the steel ingot.
CONSTITUTION: During supplying a molten steel in a lidle 1 into a pouring pipe 4 as a casting stream 3, a lead particle 10 in a hopper 22 and an iron powdery particle 20 in a hopper 22 are respectively added to and mixed in said casting stream 3. Then, said casting stream is divided into a lefthand and a righthand streams from a lower end of the pipe 4 to distribute and supply said divided streams into each casting molds 7, 7 from lower openings thereof respectively. During this time, the lead particles and the iron powdery particles are molten and the lead is uniformly dispersed into the molten steel as a single minute metal interposed substance. In this case, the iron powdery particle is molten at once and acts as a coagulation nucleus in a subsequent coagulating process to promote the coagulation of the molten steel. Then, prior to precipitating and accumulating the uniformly dispersed lead throughout the molten steel to a bottom part of the steel ingot, the coagulation is completed by the coagulation promoting effect of the iron powdery particle. Therefore, the lead accumulation to the bottom part is extremely reduced as compared to the conventional method as well as a cutting-off amount of the bottom part is also reduced extremely and, further, a lead dispersing condition is improved and, thereby, the free cutting steel with a good quality is obtained.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5394180A JPS56150156A (en) | 1980-04-22 | 1980-04-22 | Preparation of free cutting steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5394180A JPS56150156A (en) | 1980-04-22 | 1980-04-22 | Preparation of free cutting steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56150156A true JPS56150156A (en) | 1981-11-20 |
| JPS6111305B2 JPS6111305B2 (en) | 1986-04-02 |
Family
ID=12956749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5394180A Granted JPS56150156A (en) | 1980-04-22 | 1980-04-22 | Preparation of free cutting steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56150156A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110306101A (en) * | 2019-07-04 | 2019-10-08 | 北京首钢吉泰安新材料有限公司 | A kind of sulphur alloyage process that three-phase has lining electroslag furnace to smelt ball pen head high-sulfur free cutting stainless steel |
-
1980
- 1980-04-22 JP JP5394180A patent/JPS56150156A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110306101A (en) * | 2019-07-04 | 2019-10-08 | 北京首钢吉泰安新材料有限公司 | A kind of sulphur alloyage process that three-phase has lining electroslag furnace to smelt ball pen head high-sulfur free cutting stainless steel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6111305B2 (en) | 1986-04-02 |
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