ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
Collection
Publisher
Years
  • 1
    Electronic Resource
    Electronic Resource
    Rapid determination of the decarburizing activity of salt baths (1969)
    Springer
    Metal science and heat treatment 11 (1969), S. 274-279 
    Details
    ISSN: 1573-8973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. In rapid checking of the decarburizing activity of salt baths the thermo-emf, which is a complex characteristic, depends on the microstructure and composition of the solid solution in the quenched steel tape. Of major importance are the proper material and thickness of the test samples, the heating conditions and quenching rate, the time in contact with the hot electrode, and the material and temperature of the hot electrode. 2. A linear relationship was found between the carbon concentration in the solid solution and the value of the thermo-emf at 0.3–1.40% C and empirical formulas were proposed to determine the final carbon content Ck from the thermo-emf after heating in the salt bath and to calculate the decarburizing activity of the bath.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00653192
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Red hardness of high-speed steels (1975)
    Springer
    Metal science and heat treatment 17 (1975), S. 467-470 
    Details
    ISSN: 1573-8973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. The red hardness of high-speed steels can be determined from the hardness retained after additional heating at 675°C for 20 or 30 min directly after quenching — criteria RH 20 675 and RH 30 675 , which give numerically the same values as RH 4 620 but require less time. These values can be used together with others (austenite grain size, hardness) to judge the quality. 2. In increasing order of red hardness the steels investigated are arranged in the same order in which the alloying of the solid solution changes due to the chemical composition, original structure, and quenching temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00664173
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Effect of heating time during hardening on the structure and properties of high-speed steel (1960)
    Springer
    Metal science and heat treatment 2 (1960), S. 167-172 
    Details
    ISSN: 1573-8973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. When heating high-speed steel blanks for hardening, the process of saturating the solid solution with carbon and alloying elements does not end at the moment through-heating is completed. The saturation of austenite continues over a certain period of time which depends on the initial miscrostructure, the steel composition and the selected hardening temperature. It gradually vanishes later on. 2. Soaking after through-heating which is required to complete the basic stage of the passage of carbides into solid solution, is 1.16 min. for steel R18 quenched from 1275°C, and 0.6 min. for steel R9 quenched from 1230°C. 3. An additional increase in soaking time serves no useful purpose because it results in grain growth and a dis-advantageous change of the shape, size and distribution of the carbides this leading to a deterioration of mechanical properties.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00657574
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Boriding tools in electrode baths (1984)
    Springer
    Metal science and heat treatment 26 (1984), S. 190-193 
    Details
    ISSN: 1573-8973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions Boriding in a three-phase electrode bath ensures the high rate of the process, the attainment of a uniform boride layer, and significant improvement in the resistance of articles (dies, circular threading dies, etc.) of alloy steels.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00703858
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Shortened tempering time for high-speed steels R6M5, R6M5K5, and R9M4K8 (1980)
    Springer
    Metal science and heat treatment 22 (1980), S. 91-96 
    Details
    ISSN: 1573-8973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. For high-speed steels R6M5, R6M5K5, and R9M4K8 it is possible to replace multiple tempering in KNO3 at 560° for 1 h by shortened tempering at higher temperatures (580–630°) with a shorter holding time. 2. Depending on the size of the tool, the total holding time during tempering should be 19–25 min at 580°, 9–15 min at 600°, and 4–6 min at 630°. Steels R6M5 and R6M5K5 should be tempered twice at these temperatures, and steel R9M4K8 two to three times at 580–600° and twice at 630°. Tempering at 620–630° can be conducted in chloride salts that are neutral with respect to the surface of the parts. 3. The holding time required during shortened tempering and the largest possible size of the tool can be determined by means of the formulas given in the article.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00699667
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Salt mixtures used in heat treating steel in Czechoslovakia and East Germany (1963)
    Springer
    Metal science and heat treatment 5 (1963), S. 678-679 
    Details
    ISSN: 1573-8973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00660569
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Salt baths for heating metals (1970)
    Springer
    Metal science and heat treatment 12 (1970), S. 972-980 
    Details
    ISSN: 1573-8973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00653407
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    How to calculate heating time for quenching (1970)
    Springer
    Metal science and heat treatment 12 (1970), S. 1048-1062 
    Details
    ISSN: 1573-8973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. The empirical formulas obtained make it possible to calculate the through heating time for solid and hollow cylinders, regular prisms with any number of faces, parallelepipeds, and some symmetrical parts of complex shape in various media at 780–1300°, and also to determine the total time necessary for heating them to quenching temperature with the structure of the steel taken into account. 2. The basic calculations can be made by means of the data given in the tables, which facilitate the calculations and make them fairly reliable. 3. The results of the calculations match the existing experimental data on the time for heating to quenching temperature of total steels ensuring the high mechanical and cutting properties required after tempering. 4. We determined the general principle of introducing a correction in the calculations of the heating time due to the influence of the original microstructure of the steel and change in the quenching temperature and requirements for the parts, especially the red hardness.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00650837
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Effect of high-temperature martempering on the properties of high-speed steels (1973)
    Springer
    Metal science and heat treatment 15 (1973), S. 984-986 
    Details
    ISSN: 1573-8973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. Raising the martempering temperature from 400–550° to 650° for 1 h and 675° for no more than 30 min induces no noticeable changes in the structure or physical, mechanical, and cutting properties of steels R12, R6M3, R9F5, R14F4, R9K10, and R18K5F2, and can be recommended for wide use. 2. It is not recommended that the martempering temperature or time be increased beyond these limits to avoid imparing the strength, physical, and cutting properties of high-speed steels.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00656687
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    High-temperature multistage hardening of high-speed steel (1973)
    Springer
    Metal science and heat treatment 15 (1973), S. 91-94 
    Details
    ISSN: 1573-8973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions 1. Raising the temperature of the quenching bath from 400–550°C to 600–675°C with brief holding (up to 30 min) of high-speed steel R18 causes no changes in the structure or physical, mechanical, or cutting properties. 2. Raising the temperature of the quenching bath above 675°C is inadvisable, since prolonged holding may lower the red hardness, strength, and cutting properties. 3. Quenching at 600–675°C with holding for no more than 30 min and cooling in air can be recommended for wide use in heat treating various tools of high-speed steel. It prevents cracks, substantially reduces deformation (warping, changes in dimensions, etc.), and eliminates the possibility of corrosion. 4. It is recommended that high-speed steel be quenched in a bath of BNK-1 salt, containing 50% BaCl2+25% NaCl+25% KCl, with a melting temperature of 590°C and operating temperature of 610–900°C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00679734
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...