US1890595A - Acid-proof alloys - Google Patents
Acid-proof alloys Download PDFInfo
- Publication number
- US1890595A US1890595A US398099A US39809929A US1890595A US 1890595 A US1890595 A US 1890595A US 398099 A US398099 A US 398099A US 39809929 A US39809929 A US 39809929A US 1890595 A US1890595 A US 1890595A
- Authority
- US
- United States
- Prior art keywords
- alloys
- acid
- silicon
- proof
- titanium
- 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.)
- Expired - Lifetime
Links
- 229910045601 alloy Inorganic materials 0.000 title description 16
- 239000000956 alloy Substances 0.000 title description 16
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 11
- 229910052710 silicon Inorganic materials 0.000 description 11
- 239000010703 silicon Substances 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 7
- 239000010936 titanium Substances 0.000 description 7
- 229910052719 titanium Inorganic materials 0.000 description 7
- 238000005266 casting Methods 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
Definitions
- Alloys composed of iron and silicon hav-' ing a silicon content of from 7 to 20% and which strongly resist the effect of acids and other corrosive media are generally known.
- alloys are fairly strong when their silicon content lies between 7 and 12%, but their resistance to, acids is smaller than that of alloys with a higher silicon content. If the content of silicon increases above 12% these alloys become chemically more resistant, but at the cost of their strength and alloys with more than 16% silicon'are so brittle that the production of comparatively simple castings becomes very difiicult.
- the process hitherto employed for their production consists in melting down a high percentage ferro-silicon with iron and in remeltingand this is the disadvantage of this process-the resulting product in order to obtain a homogeneous material suitable for casting.
- the object of the present invention is to improve both the quality and the casting properties of the acid-proof alloys.
- the improvement of the mentioned properties is attained by alloying titanium with the usual acid-proof alloys composed of iron and silicon. Titanium may replace the silicon in the acid-proof alloys used in' practice either partly or completely.
- a real improvement both in the mechanical and in the casting properties as compared with the usual acidproof alloys is established with the group of alloys in which titanium partly replaces the silicon, namely, in thosealloys which contain 0.01 to 10%of titanium together with 7 to 20% of silicon. Alloys obtained in this manner are distinguished by their complete homogeneity and are free from gases and impurities.
- the melting of the acid-proof alloys which form the sub ect of the present invention is carried out in the usual melting apparatus, that is in the cupola furnace or-as' is especially advantageous for these alloysin the flame furnace and chiefly in the electric furnace.
- Acid-proof alloys consisting of from 0.01 to 10% of titanium, from 7 to 20% of silicon and the balance iron.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Description
Patented Dec. 13, 1932 UNITED STATES PATENT OFFICE EMANUEL VALENTA, OF I'ILSEN, CZECHOSLOVAKIA, ASSIGNOR TO FIRM LIMITED COMPANY, FORMERLY SKODA WORKS, OF PILSEN, GZECHOSLOVAKIA ACID-PROOF ALLOYS N0 Drawing. Application filed October 7, 1929, Serial No. 398,099, and in Czechoslovakia October 31, 1928.
Alloys composed of iron and silicon hav-' ing a silicon content of from 7 to 20% and which strongly resist the effect of acids and other corrosive media are generally known.
These alloys are fairly strong when their silicon content lies between 7 and 12%, but their resistance to, acids is smaller than that of alloys with a higher silicon content. If the content of silicon increases above 12% these alloys become chemically more resistant, but at the cost of their strength and alloys with more than 16% silicon'are so brittle that the production of comparatively simple castings becomes very difiicult. The process hitherto employed for their production consists in melting down a high percentage ferro-silicon with iron and in remeltingand this is the disadvantage of this process-the resulting product in order to obtain a homogeneous material suitable for casting.
The object of the present invention is to improve both the quality and the casting properties of the acid-proof alloys. The improvement of the mentioned properties is attained by alloying titanium with the usual acid-proof alloys composed of iron and silicon. Titanium may replace the silicon in the acid-proof alloys used in' practice either partly or completely. A real improvement both in the mechanical and in the casting properties as compared with the usual acidproof alloys is established with the group of alloys in which titanium partly replaces the silicon, namely, in thosealloys which contain 0.01 to 10%of titanium together with 7 to 20% of silicon. Alloys obtained in this manner are distinguished by their complete homogeneity and are free from gases and impurities. It is to be emphasized that no remelting is necessary in their production and that already on the first melting down a material is obtained of uniform, fine-grained structure without oxidizing or other liquidations, and possessing an increased resistance to corrosion, an increased tenacity and of definitely decreased brittleness. Further the suitability for casting of these alloys is improved by the infiuence of the titanium. The titanium effects an increase of the number of the crystal centres and prevents the formation of trans-crystallization zones when the wall strengths are large and in'the transitions. It influences the uniformity of the crystallized structure and diminishes the tendency to form cracks in the castings.
The melting of the acid-proof alloys which form the sub ect of the present invention is carried out in the usual melting apparatus, that is in the cupola furnace or-as' is especially advantageous for these alloysin the flame furnace and chiefly in the electric furnace.
I claim:
Acid-proof alloys consisting of from 0.01 to 10% of titanium, from 7 to 20% of silicon and the balance iron.
In testimony whereof I afiix my signature.
EMANUEL VALENTA.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS1890595X | 1928-10-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1890595A true US1890595A (en) | 1932-12-13 |
Family
ID=5458501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US398099A Expired - Lifetime US1890595A (en) | 1928-10-31 | 1929-10-07 | Acid-proof alloys |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1890595A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3457103A (en) * | 1962-12-07 | 1969-07-22 | Hoechst Ag | Process for protecting titanium and titanium alloys against corrosion by oxidizing acid media |
| US4298053A (en) * | 1974-03-18 | 1981-11-03 | Metallurgie Hoboken-Overpelt | Casting belts for machines for the continuous casting of metals |
| DE3519307A1 (en) * | 1984-06-05 | 1985-12-05 | Cabot Corp., Boston, Mass. | SILICONIC WEAR-RESISTANT ALLOY COATINGS |
-
1929
- 1929-10-07 US US398099A patent/US1890595A/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3457103A (en) * | 1962-12-07 | 1969-07-22 | Hoechst Ag | Process for protecting titanium and titanium alloys against corrosion by oxidizing acid media |
| US4298053A (en) * | 1974-03-18 | 1981-11-03 | Metallurgie Hoboken-Overpelt | Casting belts for machines for the continuous casting of metals |
| DE3519307A1 (en) * | 1984-06-05 | 1985-12-05 | Cabot Corp., Boston, Mass. | SILICONIC WEAR-RESISTANT ALLOY COATINGS |
| US4561892A (en) * | 1984-06-05 | 1985-12-31 | Cabot Corporation | Silicon-rich alloy coatings |
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