search for




 

Effects of Heat Treatment on Mechanical Properties of Stainless Steel Wire
Int J Clin Prev Dent 2017;13(4):197-202
Published online December 31, 2017;  https://doi.org/10.15236/ijcpd.2017.13.4.197
© 2017 International Journal of Clinical Preventive Dentistry.

Gyu-Sun Lee

Department of Dental Technology, Dongnam Health University, Suwon, Korea
Correspondence to: Gyu-Sun Lee
Department of Dental Technology, Dongnam Health University,50 Cheoncheon-ro 74-gil, Jangan-gu, Suwon 16328, Korea.
Tel: +82-31-249-6499, Fax: +82-31-249-6490, E-mail: gslee@dongnam.ac.kr
Received December 12, 2017; Revised December 21, 2017; Accepted December 22, 2017.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Objective: The purpose of this study is to investigate the heat treatment conditions to minimize the change of mechanical properties before and after the heat treatment of orthodontic stainless steel round wire with the length of 250 mm diameter of 0.9 mm.Methods: 250 mm long straight tensile test specimens and 30 mm straight bend test specimens were fabricated in stainless steel wire with a diameter of 0.9 mm to meet the respective test conditions. The specimens were annealed at 300°C, 500°C, 700°C and 900°C without heat treatment and mooring at 20°C per minute. specimens before and after heat treatment were subjected to a tensile test and a bend test using a universal testing machine.Results: Analysis of tensile properties proceeded on-way ANOVA. As a result of, there was a significant difference in yield load, yield strength, maximum load tensile strength. There was no significant difference in fracture displacement at 900°C. Analysis of the bending properties was carried out on-way ANOVA. As a result of, the maximum load was 300°C, 500°C and 900°C, and the tensile strengths were significantly different at 500°C and 700°C. There is no significant difference in maximum displacement.Conclusion: In the tensile test fracture displacement was higher when the heat treatment is performed at 300°C than that of the A company specific heat treatment, B, C for the company but the specific heat treatment was higher than 300°C from 500°C heating temperature goes up higher rupture displacement.
Keywords : tensile strength, yield strength, fracture displacement
References
  1. Kohl RW. Metallurgy in orthodontics. Angle Orthod 1964;34: 37-52.
  2. Thurow RC. Edgewise orthodontics. 4th ed. Saint Louis: Mosby; 1982:42-66.
  3. Brantley WA, Eliades T. Orthodontic materials: scientific and clinical aspects. Stuttgart: Thieme; 2001:77-103.
    CrossRef
  4. Shim YH. The effect of heat treatment on the corrosion properties of orthodontic super stainless steel wires [thesis]. [Seoul]: The Graduate School Yonsei University; 2001:6-7.
  5. Burstone CJ, Goldberg AJ. Maximum forces and deflections from orthodontic appliances. Am J Orthod 1983;84:95-103.
    CrossRef
  6. Khier SE, Brantley WA, Fournelle RA. Structure and mechanical properties of as-received and heat-treated stainless steel orthodontic wires. Am J Orthod Dentofacial Orthop 1988;93:206- 12.
    CrossRef
  7. Lane DF, Nikolai RJ. Effects of stress relief on the mechanical properties of orthodontic wire loops. Angle Orthod 1980;50: 139-45.
    Pubmed
  8. O’Brien WJ, Ryge G. An outline of dental materials and their selection. Philadelphia: Saunders; 1978:307-19.
  9. Skinner EW, Phillips RW. Skinner’s science of dental materials. 7th ed. Philadelphia: Saunders; 1973:653-4.
  10. Oh JS, Park SB, Son WS. Effects of low-temperature heat treatment on elastic memory process of cold worked stainless steel wire. Korean J Orthod 1992;22:647-56.
  11. Nikolai RJ. Bioengineering analysis of orthodontic mechanics. Philadelphia: Lea and Febiger; 1985:233-69.
  12. Funk AC. The heat-treatment of stainless steel. Angle Orthod 1951;21:129-38.
    Pubmed
  13. Howe GL, Greener EH, Crimmins DS. Mechanical properties and stress relief of stainless steel orthodontic wire. Angle Orthod 1968;38:244-9.
    Pubmed
  14. Goldberg AJ, Vanderby R Jr, Burstone CJ. Reduction in the modulus of elasticity in orthodontic wires. J Dent Res 1977;56: 1227-31.
    Pubmed CrossRef
  15. Durr DP, Vargas R, Adair SM. Evaluation of stress-relief methods on cobalt-chromium orthodontic wires. Pediatr Dent 1988;10:205-9.
    Pubmed
  16. Lee MS, Son BH. The effects of heat treatment of orthodontic wires. Korean J Orthod 1992;22:591-602.


March 2018, 14 (1)