{"title":"Study of Mechanical Properties and Structure of Steel C70D After Drawing Deformation and Spheroidizing Annealing","authors":"I. D. Pospelov, D. V. Matveeva, A. V. Smirnov","doi":"10.1007/s11041-025-01082-0","DOIUrl":null,"url":null,"abstract":"<p>The effect of plastic deformation of steel C70D and different modes of spheroidizing annealing after drawing on the mechanical properties and microstructure is studied. The suitability of the wire for certification to meet the special requirements of the user is assessed. After experimental fivefold drawing of the wire with diameter 3.7 mm and processing of the data of the mechanical tests, a reliable linear regression equation is obtained for determining the change in the tensile strength (σ<sub>r</sub>) of the wire as a function of the total reduction, which makes it possible to estimate the hardening factor of the wire material. To reduce the strength of the cold-drawn wire to the demanded values of σ<sub>r</sub> ≤ 650 MPa, the spheroidizing annealing mode is selected to be 710°C for 6 h, which provides the required grade of granular pearlite in the steel structure according to TU 14-178-110–89.</p>","PeriodicalId":701,"journal":{"name":"Metal Science and Heat Treatment","volume":"66 9-10","pages":"531 - 535"},"PeriodicalIF":0.6000,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Metal Science and Heat Treatment","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s11041-025-01082-0","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}
引用次数: 0
Abstract
The effect of plastic deformation of steel C70D and different modes of spheroidizing annealing after drawing on the mechanical properties and microstructure is studied. The suitability of the wire for certification to meet the special requirements of the user is assessed. After experimental fivefold drawing of the wire with diameter 3.7 mm and processing of the data of the mechanical tests, a reliable linear regression equation is obtained for determining the change in the tensile strength (σr) of the wire as a function of the total reduction, which makes it possible to estimate the hardening factor of the wire material. To reduce the strength of the cold-drawn wire to the demanded values of σr ≤ 650 MPa, the spheroidizing annealing mode is selected to be 710°C for 6 h, which provides the required grade of granular pearlite in the steel structure according to TU 14-178-110–89.
期刊介绍：
Metal Science and Heat Treatment presents new fundamental and practical research in physical metallurgy, heat treatment equipment, and surface engineering.
Topics covered include:
New structural, high temperature, tool and precision steels;
Cold-resistant, corrosion-resistant and radiation-resistant steels;
Steels with rapid decline of induced properties;
Alloys with shape memory effect;
Bulk-amorphyzable metal alloys;
Microcrystalline alloys;
Nano materials and foam materials for medical use.
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