Study on the Machinability of Free-Cutting Steels 1214 and 12L15 with Coated Tool

Wei, Ying Ying; Liu, Zhi Qiang; An, Qi; Chen, Ming

doi:10.4028/www.scientific.net/amr.426.151

Cited by 3 publications

(1 citation statement)

References 3 publications

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“…[4][5][6] Free-cutting steels are preferred in manufacturing mechanical components for their improved machinability. [6][7][8] AISI 12L14 is a Pb-added low-carbon resulphurised free-cutting steel containing 0.3 % Pb and 0.3 % S. It is used in large quantities in automotive applications such as transmission oil hydraulic control valves and oil hydraulic hose connectors, in printer shafts and other parts of office automation equipment. Lead is insoluble in free-cutting steel and during the cutting process lead particles are sheared and smeared over the tool-chip interface.…”

Section: Introductionmentioning

confidence: 99%

Analyzing the heat-treatment effect on the mechanical properties of free-cutting steels

Külekçi¹,

Eşme²,

Kahraman³

et al. 2016

Mater. Tehnol.

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In this research, the heat-treatment effect on the mechanical properties of free-cutting steels was investigated. Free-cutting steels (FCSs) are used where high degrees of machining are required as they increase the machining speed and reduce the tool wear. The effect of heat treatment on mechanical properties was identified using tensile and fatigue tests, and microstructure images taken with a scanning electron microscope (SEM). The studied material included commercially available AISI 12L14 cylindrical bars of free-cutting steel. FCS was heated to 900°C and held at this temperature for different time spans. The degradation of the mechanical properties of free-cutting steel due to the elevated temperature was assessed. At a microscopic level, more mechanical damage was observed between the steel matrix and the second phase of the heat-affected specimens. Keywords: fatigue, tensile strength, free-cutting steel, heat treatment V prispevku je bil raziskan vpliv toplotne obdelave na mehanske lastnosti avtomatnih jekel. Avtomatna jekla (FCS) se uporabljajo v primerih, ko so zahtevane velike stopnje obdelave, saj dopu{~ajo ve~je hitrosti rezanja ob manj{i obrabi orodja. Vpliv toplotne obdelave na mehanske lastnosti je bil dolo~en z rezultati nateznega preizkusa in preizkusa utrujenosti. Z vrsti~nim elektronskim mikroskopom (SEM) so bili narejeni posnetki mikrostrukture. Preiskovane so bile komercialno dosegljive palice iz avtomatnega jekla AISI 12L14. FCS je bil segret na 900°C in razli~no dolgo zadr`an na tej temperaturi. Dolo~eno je bilo zmanj{anje mehanskih lastnosti avtomatnega jekla zaradi povi{ane temperature. V toplotno obdelanih vzorcih je bilo z mikroskopom opa`enih ve~mehanskih po{kodb.

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Section: Introductionmentioning

confidence: 99%

Analyzing the heat-treatment effect on the mechanical properties of free-cutting steels

Külekçi¹,

Eşme²,

Kahraman³

et al. 2016

Mater. Tehnol.

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Aspects of Production Technology for the Environment Friendly Free-machining Steel with Tin

Ryabov

2015

Procedia Engineering

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The X-Ray–TV Investigation of Behaviour of a Bismuth Sample Introduced to Molten Steel

Ryabov¹,

Panfilov²,

Semenova³

2015

MAS

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The study is devoted to the processes accompanying introduction of bismuth to molten steel. Two variants of such introduction were used, viz. bismuth granules and bismuth contained in a steel tube. The time of tube melting, the behaviour of granules and droplets of bismuth and of the gas bubbles formed at their surfaces in the steel melt are discussed. Experiments were carried out with the 0.4 C -1 %Cr steel melt at 1550-1580 ºС by means of the X-ray -TV observation. Based on image analysis the volumes of droplets and bubbles were estimated as a function of time. Arguments are provided to support the supposition that the bubbles of bismuth vapour in steel melt are enveloped by liquid metal. Estimates of the horizontal constituent of velocity of bismuth droplets in inhomogeneously heated steel presumably permitted to observe the thermocapillary effect previously found in some other systems. Simultaneous evaluation of the volume of bismuth droplets and forming bubbles and of the contact area of the phases permitted to estimate the specific rate of evaporation of bismuth to the bubble of its own vapour at 1580 °C. It was found to be several orders of magnitude lower than that of evaporation of bismuth into vacuum.

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Study on the Machinability of Free-Cutting Steels 1214 and 12L15 with Coated Tool

Cited by 3 publications

References 3 publications

Analyzing the heat-treatment effect on the mechanical properties of free-cutting steels

Analyzing the heat-treatment effect on the mechanical properties of free-cutting steels

Aspects of Production Technology for the Environment Friendly Free-machining Steel with Tin

The X-Ray–TV Investigation of Behaviour of a Bismuth Sample Introduced to Molten Steel

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