FR2278782A1 - High speed steel cutting tools - directly cast in sand moulds, then annealed and heat-treated - Google Patents
High speed steel cutting tools - directly cast in sand moulds, then annealed and heat-treatedInfo
- Publication number
- FR2278782A1 FR2278782A1 FR7425411A FR7425411A FR2278782A1 FR 2278782 A1 FR2278782 A1 FR 2278782A1 FR 7425411 A FR7425411 A FR 7425411A FR 7425411 A FR7425411 A FR 7425411A FR 2278782 A1 FR2278782 A1 FR 2278782A1
- Authority
- FR
- France
- Prior art keywords
- annealed
- treated
- heat
- high speed
- cutting tools
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
Abstract
A steel is melted with compsn. by wt.: 1-1.2, pref. 1.05-1.15% C; 0-0.6, pref. 0.4-0.6% Si; 0-0.4% Mn, 0-0.03% S, 0-0.03% P, 10-12% W, 3.8-4.5% Cr, 2.8-3.i% V, 2.8-3.i% Mo, 4-5% Co, balance Fe; the tool is cast in this steel and annealed 5-10 hours at 850-870 degrees C, cooled then heated to 1190-1230 degrees c, quenched, and tempered at 545-575 degrees C. The moulds are pref. sand moulds with compsn. (a) silica sand 100 AFA, with 0.2-0.3% clay, 2-2.5% linseed oil, 1-1.5% molasses, total binder 2-2.k%; or (b) silica sand 60 AFA, with 1-1.k% clay, 0.5-1% linseed oil, 0.5-1% molasses, total binder 2.5-3%, 0.2% water. The steel obtd. is used e.g. in tools for turning, drilling and milling. When the tools are worn and can no longer be re-used, instead of sending them to a steelworks for remelting into bar, etc., they are directly recast, i.e. used in cast tools.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7425411A FR2278782A1 (en) | 1974-07-16 | 1974-07-16 | High speed steel cutting tools - directly cast in sand moulds, then annealed and heat-treated |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7425411A FR2278782A1 (en) | 1974-07-16 | 1974-07-16 | High speed steel cutting tools - directly cast in sand moulds, then annealed and heat-treated |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2278782A1 true FR2278782A1 (en) | 1976-02-13 |
| FR2278782B1 FR2278782B1 (en) | 1977-03-18 |
Family
ID=9141551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7425411A Granted FR2278782A1 (en) | 1974-07-16 | 1974-07-16 | High speed steel cutting tools - directly cast in sand moulds, then annealed and heat-treated |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2278782A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110468271A (en) * | 2019-09-23 | 2019-11-19 | 无锡蓬天工具有限公司 | A kind of hole saw heat treatment process |
-
1974
- 1974-07-16 FR FR7425411A patent/FR2278782A1/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110468271A (en) * | 2019-09-23 | 2019-11-19 | 无锡蓬天工具有限公司 | A kind of hole saw heat treatment process |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2278782B1 (en) | 1977-03-18 |
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