scholarly journals Development of Aus-drawing Process in Medium Carbon Spring Steel for Coil Springs

1999 ◽  
Vol 85 (5) ◽  
pp. 411-418 ◽  
Author(s):  
Michihiko AYADA ◽  
Kazuo INOUE ◽  
Nobuhiro TSUJI ◽  
Hiroshi UTSUNOMIYA ◽  
Yoshihiro SAITO
Keyword(s):  
Spring Steel ◽  
Drawing Process ◽  
Medium Carbon

Optimized Thermomechanical Treatment for Strong and Ductile Martensitic Steels

2007 ◽  
Vol 539-543 ◽  
pp. 4526-4531 ◽  
Author(s):  
Araz Ardehali Barani ◽  
Dirk Ponge
Keyword(s):  
Heat Treatment ◽  
Thermomechanical Treatment ◽  
Spring Steel ◽  
Martensitic Steels ◽  
Medium Carbon ◽  
Heat Treated ◽  
Conventional Heat Treatment ◽  
The Matrix ◽  
Different Levels ◽  
Strength And Ductility

In this study the effect of thermomechanical treatment on the microstructure of austenite and martensite and the mechanical properties of a medium carbon silicon chromium spring steel with different levels of impurities is investigated. Results are presented for conventional heat treatment and for thermomechanical treatment (TMT). Compared to conventionally heat treated samples austenite deformation improves strength and ductility. Thermomechanically treated samples are not prone to embrittlement by phosphorous. TMT influences the shape and distribution of carbides within the matrix and at prior austenite grain boundaries. It is shown that utilization of TMT is beneficial for increasing the ultimate tensile strength to levels above 2200 MPa and at the same time maintaining the ductility obtained at strength levels of 1500 MPa by conventional heat treatment. The endurance limit is increased and embrittlement does not occur.

Stamping of Hemispheric Surface Parts in Die Tool Equipped with Steel Elastic Element

2016 ◽  
Vol 684 ◽  
pp. 234-241 ◽  
Author(s):  
Elena Nesterenko
Keyword(s):  
Stress State ◽  
Elastic Element ◽  
Positive Influence ◽  
Spring Steel ◽  
Drawing Process ◽  
Calibration Process ◽  
Surface Part ◽  
Surface Accuracy ◽  
Strain Stress ◽  
Drawing Method

In the present investigation, the innovated drawing method combined with calibration process by elastic steel element of hemispheric surface part is studded. During drawing process strong meridional lengthen strength appears. That influence on necking and differential deformation distribution. In its tern, that influence on sizes and surface accuracy. Elastic element, produced of spring steel and placed along with solid punch designed to calibrate part in final drawing stage due to elastic strength happened in it. A simulation of hemispheric surface part drawing with elastic element was held. Experiment demonstrates positive influence of elastic element to decrease necking till 15-18% from started thickness. The produced part has correct strain-stress state, exact surface and minimum dispersion of dimensions.

scholarly journals Analysis of grain growth and morphology of bainite in medium-carbon spring steel

2019 ◽  
Vol 768 ◽  
pp. 138446 ◽  
Author(s):  
Aleksandra Królicka ◽  
Krzysztof Radwański ◽  
Andrzej Ambroziak ◽  
Andrzej Żak
Keyword(s):  
Grain Growth ◽  
Spring Steel ◽  
Medium Carbon

Microstructure and Mechanical Properties of Austempered Medium-Carbon Spring Steel

2018 ◽  
Vol 24 (4) ◽  
pp. 693-701 ◽  
Author(s):  
Seong Hoon Kim ◽  
Kwan-Ho Kim ◽  
Chul-Min Bae ◽  
Jae Sang Lee ◽  
Dong-Woo Suh
Keyword(s):  
Mechanical Properties ◽  
Spring Steel ◽  
Medium Carbon ◽  
Microstructure And Mechanical Properties

scholarly journals The Multi-Stage Drawing Process of Zinc-Coated Medium-Carbon Steel Wires in Conventional and Hydrodynamic Dies

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 4871
Author(s):  
Maciej Suliga ◽  
Radosław Wartacz ◽  
Marek Hawryluk
Keyword(s):  
Carbon Steel ◽  
Zinc Coating ◽  
Experimental Studies ◽  
Medium Carbon Steel ◽  
Test Material ◽  
Drawing Process ◽  
Medium Carbon ◽  
Steel Wires ◽  
Multi Stage ◽  
Lubrication Conditions

This paper discusses experimental studies aiming to determine the effect of the drawing method on the lubrication conditions, zinc coating mass and mechanical properties of medium-carbon steel wires. The test material was 5.5 mm-diameter galvanized wire rod which was drawn into 2.2 mm-diameter wire in seven draws at a drawing speed of 5, 10, 15, 20 and 20 m/s, respectively. Conventional and hydrodynamic dies with a working portion angle of α = 5° were used for the drawing process. It has been shown that using hydrodynamic dies in the process of multi-stage drawing of zinc-coated wire improves the lubrication conditions, which leads to a reduction in friction at the wire/die interface. As a consequence, wires drawn hydrodynamically, as compared to wires drawn conventionally, are distinguished by a thicker zinc coating and better mechanical and technological properties.

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