Wear mechanism of coated tools in the turning of ductile cast iron having wide range of tensile strength

2017 ◽  
Vol 47 ◽  
pp. 46-53 ◽  
Author(s):  
Israel Martinez ◽  
Ryutaro Tanaka ◽  
Yasuo Yamane ◽  
Katsuhiko Sekiya ◽  
Keiji Yamada ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Cast Iron ◽  
Wear Mechanism ◽  
Ductile Cast Iron ◽  
Coated Tools ◽  
Wide Range

Microstructure and Properties of Cast Iron with Semi-Solid Process Using Cooling Plate Technique

2010 ◽  
Vol 457 ◽  
pp. 79-83 ◽  
Author(s):  
Mitsuharu Takita
Keyword(s):  
Tensile Strength ◽  
Cast Iron ◽  
Gray Iron ◽  
Ductile Cast Iron ◽  
Advanced Materials ◽  
Damping Capacity ◽  
Cooling Plate ◽  
Plate Technique ◽  
Wide Range ◽  
Semi Solid

Semi-solid metal processing with the cooling plate technique is one of the key technologies for producing advanced materials. The multitude of cast iron families with their wide range of mechanical properties, and relatively low costs combined with the advantage of semi-solid processing allow production of high quality cast components from cast iron. The effect of semi-solid processing using the cooling plate technique on the microstructure and the properties of cast iron is studied. The investigated material is hypo-eutectic, hyper-eutectic gray iron, compacted graphite and ductile cast iron. The results indicated that the microstructure (primary austenite and graphite) becomes finer and more globular by increasing the fraction of solid. The tensile strength of semi-solid processed cast iron is relatively high compared with ordinary cast iron. The values of both the tensile strength and the elongation depend on the fraction of solid. The total fracture strength is observed to depend on the graphite morphology as well as the matrix contribution that mainly depends on fraction of solid. The wear resistance and damping capacity of cast iron were investigated as a function of the relative amount of primary fraction of solid.

Joint Strength and its Improvement of Friction Welded Joint Between Ductile Cast Iron and 5052 Al Alloy

2020 ◽  
Author(s):  
Masaaki Kimura ◽  
Akira Yoneda ◽  
Masahiro Kusaka ◽  
Koichi Kaizu ◽  
Kazuhiro Hayashida ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Cast Iron ◽  
Base Metal ◽  
Joint Strength ◽  
Welded Joint ◽  
Weld Interface ◽  
Ductile Cast Iron ◽  
Al Alloy ◽  
High Tensile Strength ◽  
Graphite Particles

Abstract To obtain dissimilar joint for easily making multi-material structures, the characteristics of friction welded joint between ductile cast iron (FCD400) and 5052 Al alloy (A5052) was investigated. The relatively high tensile strength of joint was obtained when that was made with a friction speed of 27.5 s−1, a friction pressure of 20 MPa, a friction time of 1.5 s, and a forge pressure of 270 MPa, respectively. However, this joint had approximately 77% in the tensile strength of the A5052 base metal and that was fractured at the weld interface. Although the weld interface had no intermetallic compound layer, the fractured surface at the A5052 side had some graphite particles that were supplied from the FCD400 side. To improve the joint strength, the graphite particles were reduced from the weld faying surface at the FCD400 side by decarburization treatment. The joint had approximately 96% in the tensile strength of the A5052 base metal and that was fractured between the A5052 side and the weld interface. The joint with high tensile strength as well as the possibility improving the fractured point of that were obtained when those were made with opportune friction welding condition and no graphite particles at the weld faying surface of the FCD400 side.

scholarly journals Influence of nickel addition and casting modulus on the properties of hypo-eutectic ductile cast iron

2019 ◽  
Vol 55 (2) ◽  
pp. 283-293 ◽  
Author(s):  
E. Colin-García ◽  
A. Cruz-Ramírez ◽  
G. Reyes-Castellanos ◽  
J.A. Romero-Serrano ◽  
R.G. Sánchez-Alvarado ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Cast Iron ◽  
Cooling Rate ◽  
Ductile Iron ◽  
Ductile Cast Iron ◽  
Strength Ratio ◽  
Cast Irons ◽  
Microstructural Changes ◽  
Nodule Count ◽  
Nickel Addition

The effect of the casting modulus on the distribution and features of graphite in hypo-eutectic ductile iron unalloyed and alloyed with nickel (0.88 wt %) was studied. The cooling rate of the casting plates of 25.4, 12.7 and 8.5 mm in thickness with a casting modulus of 6.87, 4.46 and 3.31 mm, respectively promotes several microstructural changes, such as cementite precipitation and a noticeable nodule count increment. The nickel addition suppressed the cementite formation and improved the nodule count and nodularity for the three casting modulus evaluated. The nickel addition increased the nodule count in 69, 67 and 128 % for the modulus of 3.31, 4.46 and 6.87 mm, respectively, regarding the unalloyed ductile iron. It was found that the biggest casting modulus produced the biggest nodules with the lowest nodule count for both ductile cast irons. Further to the improvements in the graphite features, the nickel addition allowed to keep almost constant the yield and tensile strength ratio for the different casting modulus.

scholarly journals Research on Tensile Behaviour of New Structural Material MoNiCa

2019 ◽  
Vol 25 (3) ◽  
pp. 292-296 ◽  
Author(s):  
Aliaksandr BAHDANOVICH ◽  
Regita BENDIKIENE ◽  
Ramunas CESNAVICIUS ◽  
Antanas CIUPLYS ◽  
Vytautas GRIGAS ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Cast Iron ◽  
Structural Material ◽  
High Efficiency ◽  
Critical Mass ◽  
Ductile Cast Iron ◽  
Carbon Equivalent ◽  
Tensile Behaviour ◽  
Strength Increase ◽  
Heat Treated

This article presents the results of a set of innovative research to analyse a new structural material – steel like austempered ductile cast iron with mechanical properties similar to heat-treated steel, and with technological and exploitation characteristic close to high-strength cast iron with nodular graphite. Specific examples of its high efficiency for the manufacture of critical, mass and heavy-loaded components of modern machinery and equipment are presented. New structural material MoNiCa was tested on tension and was compared to commercial grades of austempered ductile cast irons and heat treated steels. Unconventional behaviour of examined material was observed: with tensile strength increase to almost 1600 MPa the metal became less brittle. Hardness test revealed another distinctive feature of new material that there is no linear relation between strength and hardness increase, different hardness values ~ 40 HRC or ~ 55 HRC can be achieved with the same tensile strength 1000 – 1200 MPa. Microscopic analysis demonstrated of sophisticated structure formed owing to different regimes of austempering treatment. Specific properties emerged from successful ratio of three elements Mo, Ni, and Cu (carbon equivalent), and properly chosen heat treatment modes. DOI: http://dx.doi.org/10.5755/j01.ms.25.3.23079

A General Process for In Situ Formation of Iron-Matrix Composites Reinforced by Carbide Ceramic

2016 ◽  
Vol 852 ◽  
pp. 461-466 ◽  
Author(s):  
Xin Wang ◽  
Li Sheng Zhong ◽  
Na Na Zhao ◽  
Vladimir E. Ovcharenko ◽  
Yun Hua Xu
Keyword(s):  
Cast Iron ◽  
High Hardness ◽  
Ductile Cast Iron ◽  
Matrix Composites ◽  
Iron Matrix ◽  
General Process ◽  
Ceramic Particles ◽  
Wide Range ◽  
The Matrix

Ceramic particles (such as VC, NbC, TiC, and WC), which exhibit high hardness and thermal stability, can be used for in situ fabrication of carbide-reinforced iron matrix composites with high macro-hardness and toughness. In this study, we describe a novel in situ process comprising infiltration casting and heat treatment to form carbide-reinforced iron matrix composites with hard ceramic particles. Our proposed approach was used to integrate different alloy wires, which can easily form carbides, into the metal matrix and cast a known amount of carbon, such as gray cast iron, ductile cast iron, or ordinary white cast iron, to form alloy-reinforced iron matrix composites. Thermal treatment of the resulting composites allowed the alloy elements of the wire to react with carbon in the matrix to form evenly distributed carbide particles. This approach can be applied to a wide range of materials with different morphologies for fabricating composites, machining tools, and wear-resistant components.

scholarly journals Dependency of tensile strength of ductile cast iron on strain rate and temperature

2017 ◽  
Vol 842 ◽  
pp. 012049
Author(s):  
Tomohiro Ikeda ◽  
Takuo Umetani ◽  
Nobuhiro Kai ◽  
Keisaku Ogi ◽  
Nao-Aki Noda ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Cast Iron ◽  
Strain Rate ◽  
Ductile Cast Iron

Wear Characteristics of Coated Carbide Tools in the Face Milling of Ductile Cast Iron

2017 ◽  
Vol 749 ◽  
pp. 178-184 ◽  
Author(s):  
Israel Martinez ◽  
Ryutaro Tanaka ◽  
Yasuo Yamane ◽  
Katsuhiko Sekiya ◽  
Keiji Yamada ◽  
...  
Keyword(s):  
Cast Iron ◽  
Flank Wear ◽  
Ductile Cast Iron ◽  
Face Milling ◽  
Carbide Tool ◽  
Coated Tools ◽  
Coated Carbide Tool ◽  
The Face ◽  
Coated Carbide ◽  
Coated Carbide Tools

This study reports an experimental investigation about the wear behavior of TiN and TiCN coated carbide tools during the face milling of pearlitic and ferritic ductile cast iron. Pearlitic ductile cast iron caused the highest cutting forces and flank wear in both TiN and TiCN coated tools. Due to its protective effect, the TiCN coated carbide tool outperformed the TiN coated carbide tool regarding flank wear. The main issue when face milling ferritic ductile cast iron with TiN coated tools was notching wear. The principal reason for notch wear was pointed as adhesive wear caused for the high tendency of ferrite to adhere on the tool. The results demonstrated that the TiCN coating did not showed notching wear when face milling ferritic ductile cast iron, therefore a good choice of coating material can prevent notching wear.

scholarly journals Tribo-fatigue Behavior of Austempered Ductile Iron MoNiCa as New Structural Material for Rail-wheel System

2020 ◽  
Vol 26 (4) ◽  
pp. 432-437 ◽  
Author(s):  
Regita BENDIKIENE ◽  
Aliaksandr BAHDANOVICH ◽  
Ramunas CESNAVICIUS ◽  
Antanas CIUPLYS ◽  
Vytautas GRIGAS ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Cast Iron ◽  
Structural Material ◽  
Rail Steel ◽  
Fatigue Behavior ◽  
Experimental Studies ◽  
Surface Hardness ◽  
Economic Benefits ◽  
Ductile Cast Iron ◽  
Rolling Surface

This research presents the results of tribo-fatigue behavior of austempered ductile cast iron MoNiCa and gives a comparison with standard grades of steel and cast iron. Due to the possibility to combine the castability of cast iron and toughness of steel in one material, new structural material MoNiCa attracted attention of industry and science because of economic benefits and high performance at the different application areas. After successful former experiments the main directions of further development of research for solving relevant practical wear and fatigue problems in rail-wheel system were framed. The complex experimental studies have demonstrated that MoNiCa is consistent with heat treated steels including the rail steels: required tensile strength of rail steel ranges from 1180 MPa to 1280 MPa when rolling surface hardness have to be from 38 HRC to 44 HRC whereas new structural material showed higher tensile strength up to 1400 MPa and slightly higher hardness up to 50 HRC. Herewith the workability of frictional couple cast iron MoNiCa/steel 20MnCr5G exceeds work performance of steel/steel system by 14 %.

Wear Mechanisms of Gray Cast Iron in the Presence of Environmentally Friendly Hydrofluoroolefin-Based Refrigerant and the Effect of Tribofilm Formation

2015 ◽  
Vol 137 (4) ◽  
Author(s):  
M. Wasim Akram ◽  
Andreas A. Polycarpou
Keyword(s):  
Cast Iron ◽  
Critical Velocity ◽  
Wear Mechanism ◽  
Wear Mechanisms ◽  
Gray Cast Iron ◽  
Environmentally Friendly ◽  
Operating Conditions ◽  
Gray Cast ◽  
Wide Range ◽  
Replacement Solution

Hydrofluoroolefin-based refrigerant (2,3,3,3-tetrafluoropropene, namely, HFO-1234yf), which has been developed as an environmentally friendly refrigerant, is proposed as a direct replacement solution in automotive air-conditioning compressor applications. In the present work, the wear mechanisms of this refrigerant using gray cast iron interfaces were investigated under a wide range of operating conditions. A critical velocity was measured from scuffing type experiments, where beyond that maximum interfacial loads did not change significantly with sliding velocity, suggesting a mechanical rubbing-type wear mechanism. Below the critical velocity, scuffing loads decreased almost linearly with sliding velocities. Wear type experiments identified two different wear mechanisms, namely, oxygen-dominating and fluorine-dominating wear, depending on sliding velocities and normal loads. Oxygen-dominating wear mechanism prevailed under low sliding velocities and normal loads. In contrast, fluorine-dominating wear was predominant under moderate sliding velocities and low or moderate loads. The formation of protective tribofilms and their effect on the wear mechanism was used to construct a wear map.

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