Extending sleeve life in a borehole pipe by thermocyclic treatment

Autor:	Yu. A. Samoilovich
Rok vydání:	2017
Předmět:	Materials science Metallurgy Borehole Izod impact strength test 02 engineering and technology 020501 mining & metallurgy Wear resistance Compressive strength 0205 materials engineering Diffusionless transformation Martensite General Materials Science Composite material Layer (electronics)
Zdroj:	Steel in Translation. 47:274-279
ISSN:	1935-0988 0967-0912
DOI:	10.3103/s096709121704009x
Popis:	The wear resistance of cylindrical bushes in borehole pumps may be improved by thermocyclic treatment of the cast Kh12 steel blanks, including 3–4 cycles over the range 25–950°C, with 30-min holding at the elevated temperature. In that case, a relatively hard martensite layer (HRC 65) is formed at the bush’s working surface. The martensite layer is also characterized by elevated impact strength. The wear resistance of the bush may also be increased by the formation of considerable compressive stress (500 MPa) in a (5–6)-mm layer at the bush’s working surface under the influence of martensitic transformation at the end of heat treatment.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a04f7570e745b7bf3d7be812cfc3b1b9 https://doi.org/10.3103/s096709121704009x Zobrazit plný text záznamu Full text from SpringerLink