LABORATORY OF SPECIAL METALLURGY (LASMET) Co.
2-ya Paveletskaya St., 18
Chelyabinsk 454047, Russia
Tel./Fax: + 7-(351)-283-27-00
E-mail:"Contacts"
- Technological consulting for metallurgical enterprises (secondary steelmaking and casting of high quality steel grades, smelting and remelting of special steels and superalloys)
- Research dedicated to steel cleanliness and quality improvement, mechanical and technological properties enhancement
- Developments of computer simulation of non-metallic inclusions transformation during high quality steel secondary steelmaking and casting
- Special metallurgy research: Electric Arc Melting, Vacuum Induction Melting (VIM), Vacuum Arc Remelting (VAR)
- Development of innovative VAR control system
- Research of metals, non-metallic inclusions, and slag samples using modern electron microscopy methods
For researches we use:
- laboratory-scale vacuum induction melting furnace with 30-kg crucible;
- scanning electron and optical microscops;
- own software package for simulation of non-metallic inclusions transformation during alloying, deoxidation, vacuum degassing, reoxidation, etc.;
- information data base about the latest technological developments in field of steel and superalloys making.
Modern electron microscopy permits to define a non-metallic inclusions composition, to detect steel micro-structure peculiarities, and to investigate micro-defects in cast and deformed steel in detail.
Computer thermodynamic simulation of non-metallic inclusions transformation in liquid steel is additional powerful research method.
Complex application of these two methods permits effective carry out investigations dedicated to enhancement technologies of high quality steel and alloys for assurance of requirements to metal chemical composition, to non-metallic inclusions characteristics, and to mechanical properties.
Lasmet Co. has been developing technologies for continuous billets casting of LCAK-steel, for secondary steelmaking of such “clean” steel grades as cord, rail, line-pipe, and deep drawing steels. We have been defining genesis of various type surface and subsurface defects on hot and cold-rolled sheets and proposing measures for continuous slab casting and rolling technologies.
On basis of hard investigations of physical-chemistry processes of alkali-earth metals evaporation and rare-earth metals oxidizing during vacuum induction melting of superalloys we developed a concept of precise micro-alloying by high-active elements (Mg, La, Ce, etc.) for VIM conditions.
Realization on practice an accuracy balance between these active elements and sum of sulfur and oxygen in metal (on basis of our concept application) permits to dramatic enhance of superalloys hot workability, and metal yield.
Developed by Lasmet Co. VAR automation control system surpasses all known in the world analogies.
Distinctive feature of our VAR automation control system is ability to look-ahead response on short periods of arc disturbances or “glow conditions” (which lead to defects in ingots). Consequently the arc disturbances periods time dramatic shrinks, and its harmful influence on ingot quality is removed.
For assurance of aircraft alloys quality this VAR automation control system record in detail all remelt’s significant parameters.
The system was successfully tested on large-scale vacuum arc furnaces.
Performed work:
1. SEM analyses of non-metallic inclusions and defects in cast steel, slabs, and sheets (for ZapSib, 2008)
2. Development of optimum rail steel secondary steelmaking technology (2008)
3. Analysis of metal quality and development of steel slab making technology (including V, Ti, Nb, B, Mo, Ni, Cr- bearing steel grades) for execution of extra-requirements to steel chemical composition (for ZapSib, 2007)
4. Investigation of steel quality (including non-metallic inclusions characteristics) on basis of SEM-analyses and computer thermodynamic simulation (for ZapSib, 2006)
5. LCAK-steel secondary steelmaking and continuous billet casting technologies development (for ZapSib, 2005)
6. Technologies of secondary steelmaking and continuous billet casting of low silicon LCAK-steel (including Ti-bearing steel grades) development (for CherMK Co. 2004)
7. Computation of non-metallic inclusions composition and amount during secondary steelmaking, casting, and crystallization of cord steel (2003)
8. Development of requirements specification for 25-t vacuum induction furnace automation control system (for ChMK, 2002)
9. Development of modern high-efficiency VIM + VAR technology of special steels and superalloys (for ChMK, 1994)
10. Technology of superalloys treatment by alkali-earth and rare-earth elements in large-scale vacuum induction furnaces development (1992)
11. Implementation of VIM + 2 VAR recourse-saving technology for superalloys and corrosion resistance steels (for ChMK, 1992)
12. Implementation of new VAR automation control system and development of measures for superalloys yield increase (for ChMK, 1991)
13. Technology of extra clean corrosion resistance steel manufacturing in large-scale vacuum induction furnaces development (for ChMK, 1989)
14. Recourse-saving VIM + 2 VAR technology for special steels and superalloys production development (for ChMK, 1989)
15. Implementation of VAR technology of cast consumable electrodes from 14Cr3NiMo steel in vacuum arc furnaces “DSV-8G10” with mould 600 and 700 mm diameter (for ChMK, 1987)
16. Investigation of reducing slag interaction with metal and ingot mould (1991)
17. New VAR automation control system testing and measures for superalloys yield increase development (1991)
18. Analysis of ChS-70 alloy casting micro-composition stability and effectiveness of micro-alloying during VAR (1991)
19. Development of corrosion resistant scrap remelting technology for production of market required steels (1991)
20. New VAR automation control system regimes for VAR furnaces “DSV-8G10” development (1991)
21. Extra corrosion resistant superalloy technology development (1991)
22. Development of new hot resistant alloy for distillation retorts (1991)
23. Development of foundations of superalloys VAR metal-saving technology (for ChMK, 1991)
24. Development of high-refined austenitic corrosion resistant steel technology and billets pilot batch production (1990)
25. Maraging steels smelting and further treatment technologies development (1990)
26. Extra corrosion resistant and extra technological properties Ni-base alloy development (1990)
27. Investigation of 65NiMo (VIM + VAR) corrosion resistant alloy heavy plate properties and structural peculiarities on the all stages of its production (1990)
28. Development of construction steels cast consumable electrodes vacuum arc remelting to 700 mm mould (1990)
29. Development and testing of Ni-base alloy with extra corrosion resistant and technological properties (1990)
30. Investigation of smelting and VAR technologies of N-bearing 03C18Cr15Ni4Mo type steel complied with ISO for implants (1989)
31. Fundamentals development of EP-630 hot resistant alloy micro-alloying aimed to technological ductility increase (1989)
32. Development of modifying and micro-alloying complex technologies for manufacture of EP-962 (EAF + VAR) type superalloys (1989)
33. Optimal technology of modifying and micro-alloying of Ni-base cast superalloys (1989)
34. Investigation of mechanical and technological characteristics of high-alloyed maraging and austenitic steels, and their composition optimization (1989)
35. Implementation of special steels and superalloys VAR technology on DSV-4.5G2 furnaces equipped new control system (1989)
36. Development of metal-saving technology of consumable electrodes production in 25-ton vacuum induction furnaces (for ChMK, 1989)
37. Origin of metallurgical defects in EP-742 alloy VAR ingots search (for ChMK, 1988)
38. Development of special steels and superalloys VAR technology on DSV-4.5G2 furnaces equipped new control system (1988)
39. EP-742 superalloys quality enhancement via vacuum smelting and remelting technology modification (for ChMK, 1988)
40. Development of vacuum smelting technology of corrosion resistant and maraging steels for billets and heavy plates (1998)
41. Analysis of influence of chemical composition including micro-alloyed elements on alloy special properties of Cr16Al (induction melting) (1987)
42. Analysis of VAR metal’s structure with bonded solidification defect (1987)
43. Development of technology production of high strength steels, corrosion resistant steels, superalloys, and new age precisions alloys in large scale vacuum induction and VAR furnaces (for ChMK, 1987)
44. Development of technology of Cr3NiMo cast steel electrodes vacuum arc remelting in DSV-8 G10 furnaces with 600 and 700 mm moulds (1987)
45. Investigations of process of consumable electrode surface treatment by vacuum arc (1986)
46. Development of main functions of VAR control system by using computer “Iskra-1256” (1986)
47. Development of smelting technology of superalloys intended for gas turbines (1985)
48. Enhancement of pilot plant design and technology for bimetallic cored VAR ingots manufacturing (1985)
49. Building of pilot plant for bimetallic cored VAR ingots manufacturing and technology development (1984)
50. Development of industrial technologies for VAR of steels and alloys in modern DSV-8G10 and DSV-4.5G2 furnaces (for ChMK, 1984)
51. Analysis of influence of vacuum melting technology on recovery rate of micro-additions which enhance of superalloys technological and service properties (1984)
52. Analysis of structure and properties of Cr55NiMoBAl/ EP-666 (EAF + VAR) alloy with bonded solidification type macro-structure (1984)
53. Analysis of ChS-57 alloy low ductility origin and development of measures for the ductility increase (1984)
54. The superalloys: methods used for macro-structure control and rating. Validity check of standard GOST 22838-77 (1983)
55. Implementation of VIM ingots head heat insulation technology (1983)
56. Investigation of effect of a superalloys micro-composition on hot workability (1982)
57. Analysis and composition optimization of complex modifying agents using in manufacture of steel and cast-iron critical foundry goods for cars and tractors (1982)
58. Composition optimization of complex modifying agents using in manufacture of steel and cast-iron critical foundry goods for cars and tractors (1982)
59. Analysis of quality of I-1 steel cold-rolled 1.3 mm sheets (for “Krasniy Oktiabr” steel works, 1982)
60. Implementation of VAR technology for manufacturing of bimetal ingots with diameter 600 mm for the purpose of tubes for nuclear power plants production (1982)
61. Development of technologies of bimetal tube billets manufacture for further production of large diameter tubes for needs of nuclear power plants (1981)
62. Analysis of heat balance in large VAR and ESR furnaces (1981)
63. Development and checkout of heat-metering based information system for vacuum arc and electro-slag remelting furnaces (1981)
64. Analysis of 18Cr10NiTi sheet quality (for “Krasniy Oktiabr” steel works, 1980)
65. Analysis of causes of poor results of certification tests of 3.6CMnNi steel sheets (for “Krasniy Oktiabr” steel works, 1979)
66. Analysis of boron effect on corrosion resistant steel hot workability (1979)
67. Analysis and comparison of technological and service properties of austenitic and ferritic corrosion resistant steels (1979)
68. Investigation of main technological factors effect on heat current from ingot to mould in vacuum arc furnace (1979)
69 Analysis of quality of some I-1 steel batches with low hardness after heat treatment (for “Krasniy Oktiabr” steel works, 1979)
70. EP-667 steel composition optimization for the purpose of its technological and service properties increase (1978)
71. Complex investigation of steels and superalloys VAR process and data acquisition for the purpose of VAR control on basis of information about mass and electrode melting speed algorithm design (1978)
