Wear resistance of high-strength cast iron with spheroidal graphite produced by centrifugal casting

1968 ◽  
Vol 10 (9) ◽  
pp. 745-746 ◽  
Author(s):  
I. O. Tsypin ◽  
N. S. Pavlenko ◽  
V. A. Rusalkin ◽  
A. A. Chernyi ◽  
M. B. Zhitomirskii ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
Centrifugal Casting ◽  
High Strength ◽  
Spheroidal Graphite

scholarly journals Research and Analysis of the Effect of Heat Treatment on Damping Properties of Ductile Iron

Open Physics ◽  
2019 ◽  
Vol 17 (1) ◽  
pp. 566-574
Author(s):  
Yu Zhang ◽  
Erjun Guo ◽  
Liping Wang ◽  
Yicheng Feng ◽  
Sicong Zhao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Wear Resistance ◽  
Cast Iron ◽  
Ductile Iron ◽  
Cast Steel ◽  
High Stress ◽  
High Strength ◽  
Spheroidal Graphite ◽  
High Plasticity

Abstract With the continuous development of metal manufacturing technology, high-strength and high-hardness ductile iron materials have excellent comprehensive performance. Many performance indexes are comparable to those of alloy steels, and they have excellent casting properties. Many large-scale parts produced by cast steel are slowly being replaced by this material. Ductile iron is obtained by a spheroidizing treatment and inoculation to obtain spheroidal graphite. The mechanical properties of cast iron have been effectively improved, especially plasticity and toughness, and the strength obtained is higher than that of carbon steel. Ductile iron has the properties of iron and the properties of steel. It is a new type of engineering material with high plasticity, strength, corrosion resistance, and wear-resistance. Because of its excellent performance, it has been successfully used to cast parts with high-stress conditions, high strength, toughness and wear resistance. Due to the small splitting effect of ductile iron on the metal matrix, the stress concentration is effectively eliminated. Therefore, the matrix structure of ductile cast iron is changed by heat treatment, thereby improving its mechanical properties and the damping performance of the material itself. Through a heat treatment process experiment of ductile iron, the related process and technical measures of damping performance in the heat treatment production process are obtained.

ZA-12

Alloy Digest ◽  
1977 ◽  
Vol 26 (9) ◽  
Keyword(s):  
Fracture Toughness ◽  
Wear Resistance ◽  
Shear Strength ◽  
Cast Iron ◽  
High Strength ◽  
Heat Treating ◽  
General Purpose ◽  
Corrosion And Wear ◽  
Aluminum Castings ◽  
Moderate Cost

Abstract ZA-12 is a zinc-aluminum-copper foundry alloy recommended for general-purpose castings of high strength at moderate cost. Its properties are similar to those of cast iron; however, it was designed for use in nonferrous foundries to compete with cast-iron, bronze, brass and aluminum castings. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive and shear strength as well as fracture toughness and fatigue. It also includes information on corrosion and wear resistance as well as casting, forming, heat treating, machining, and surface treatment. Filing Code: Zn-31. Producer or source: Eastern Alloys Inc.. See also Alloy Digest Zn-49, May 1990.

scholarly journals Copper Enrichment around Graphite in Cu-added High-Strength Spheroidal Graphite Cast Iron

Materia Japan ◽  
2009 ◽  
Vol 48 (12) ◽  
pp. 624-624 ◽  
Author(s):  
Yasuhide Ishiguro ◽  
Kenji Ichino ◽  
Hideto Takasugi
Keyword(s):  
Cast Iron ◽  
High Strength ◽  
Spheroidal Graphite ◽  
Spheroidal Graphite Cast Iron ◽  
Graphite Cast Iron

ISO 185/JL/350

Alloy Digest ◽  
2021 ◽  
Vol 70 (9) ◽  
Keyword(s):  
Thermal Conductivity ◽  
Tensile Strength ◽  
Cast Iron ◽  
Gray Cast Iron ◽  
High Strength ◽  
Heat Treating ◽  
Gray Cast ◽  
Spheroidal Graphite ◽  
Cast Irons ◽  
Test Pieces

Abstract ISO 185/JL/350 is a higher-tensile-strength gray cast iron that has a pearlitic matrix, and a tensile strength of 350–450 MPa (51–65 ksi), when determined on test pieces machined from separately cast, 30 mm (1.2 in.) diameter test bars. It provides a combination of high strength while still maintaining good thermal conductivity compared with other types of cast iron. This grade approaches the maximum tensile strength attainable in gray cast iron. Applications therefore tend to be confined to those where thermal conductivity requirements in service preclude the use of one of the other higher-strength materials such as spheroidal graphite cast irons, which have inferior thermal properties. This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on wear resistance as well as casting and heat treating. Filing Code: CI-85. Producer or source: International Organization for Standardization.

scholarly journals Ausferritic (bainitic) cast iron: Harmonization of international standard ISO 17804 in application to the conditions of Belarus

2021 ◽  
pp. 56-72
Author(s):  
A. I. Pokrovskii ◽  
B. B. Khina ◽  
O. A. Tolkacheva
Keyword(s):  
Tensile Strength ◽  
Cast Iron ◽  
Ductile Iron ◽  
High Strength ◽  
State Committee ◽  
Spheroidal Graphite ◽  
Cast Irons ◽  
International Standard ◽  
Industrial Enterprises ◽  
State Organizations

The experience of the Physico-technical Institute (PhTI) of the National Acdemy of Sciences of Belarus in the harmonization of international standard ISO 17804 (Founding – Ausferritic spheroidal graphite cast irons – Classification) and development of the Belorussian analogue STB ISO is described. The reasons for the choice of austempered ductile iron (ADI) as an object for standard harmonization are presented: it is the most promising cast iron in comparison with gray and classical ductile iron. The work procedure on harmonization is described: how to include the task into the State Plan on standardization, specificity of translation of the text, peculiarities of with state organizations responsible for approbation of standards such as Belorussian Institute for Standardization and Certification (BelGISS) and State Committee on Standards (Gosstandart), writing a summary of external reviews, working with critical comments from potential users. It is outlined that any foreign standard does not exists independently but is closely connected with at least 10 to 20 other standards. Thus, harmonization necessitates coordination with other standards and sometimes even with handbooks by adding annexes to the main text. The importance of a proper choice of the standard status is outlined: identical (ID) or modified (MOD). Developing an identical standard is prestigious but difficult because is requires harmonization of all the referenced standards, which is a very labor-consuming procedure. It is argued that the most suitable is ‘intermediate’ variant: adopting the authentic text of the international standard (in high-quality translation) but with annexes reflecting national specificity in this area. As a result, a harmonized standard is developed which, for the first time in Belarus, standardize the tensile strength of 800 MPa in combination with the elongation of 10 % and the tensile strength of 1400 MPa in combination with the elongation of 1 % for cast irons.The annual demand for ADI in Belarus is estimated as about 10,000 ton. It is shown that in Belarus, where about 60 industrial enterprises have a foundry and almost every engineering plant has a heat-treatment shop, austempered ductile cast (ADI), which features a high strength, can successfully compete with rolled steel in certain applications.

Bainitic high-strength cast iron with spheroidal graphite (review)

1991 ◽  
Vol 33 (10) ◽  
pp. 762-771
Author(s):  
B. I. Voronenko ◽  
Yu. I. Romatovskii
Keyword(s):  
Cast Iron ◽  
High Strength ◽  
Spheroidal Graphite

Interfacial Characteristics and Wear Resistance of WCp/White-Cast-Iron Composites

2007 ◽  
Vol 26-28 ◽  
pp. 293-296 ◽  
Author(s):  
Guo Shang Zhang ◽  
Yi Min Gao ◽  
Jian Dong Xing ◽  
Shi Zhong Wei ◽  
Xi Liang Zhang
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
White Cast Iron ◽  
Centrifugal Casting ◽  
Casting Process ◽  
Iron Matrix ◽  
High Chromium ◽  
X Ray ◽  
High Chromium Cast Iron ◽  
Wear Tests

To improve the wear resistance of high chromium white cast iron under severe abrasive conditions, a composites layer was designed for wear surface, which were locally reinforced with WC particles. And the local composites were successfully fabricated by optimized centrifugal casting process. Then the interface between WC and iron matrix was analyzed with scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD). And three body wear tests were carried out on a self-made rig to investigate the wear resistance of the composites. For comparison, the wear tests of high chromium white cast iron were also carried out under the same conditions. The results show that: There are no defects such as inclusion, crack, gas pore and so on in the obtained composites layer, which with a uniform thickness of 10 mm. WC particles are homogeneously distributed in the composites layer and tightly bonded with the iron matrix. The WC particles are partially dissolved in the iron matrix during centrifugal casting. The elements W, C and Fe react to form new carbides such as Fe3W3C or M23C6, which precipitate around former WC particles during subsequent solidification. So the interface between WC particles and the iron matrix is a strong metallurgical bonding. WC particles in the composites layer can effectively resist cutting by the abrasive, and then protect the matrix. The wear resistance of the composites layer is 7.23 times of that of high chromium cast iron.

scholarly journals Technological pecularities of producing cast iron with spherical graphite using a fast-cooled copper-magnesium ligature

2020 ◽  
pp. 15-21
Author(s):  
A. G. Slutsky ◽  
I. L. Kulinich ◽  
V. A. Sheinert ◽  
V. A. Stefanovich ◽  
R. E. Trubitsky ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cast Iron ◽  
Chemical Composition ◽  
Magnesium Alloys ◽  
High Strength ◽  
Favorable Effect ◽  
Maximum Effect ◽  
Spheroidal Graphite ◽  
Graphite Phase ◽  
Spherical Graphite

Various modifiers are used for non-furnace processing of cast iron. Some of them are designed for inoculating modification, which improves mechanical properties and eliminates the appearance of whiteness in castings, while others are designed for spheroidizing processing, in particular for producing cast iron with spherical and vermicular graphite. Some have both spheroidizing and inoculating properties. The main part of inoculating and spheroidizing modifiers is made on iron-silicon, Nickel and copper bases.In addition to the chemical composition, the size of the modifier particles, as well as their shape, are of great importance for modification. The optimal size of the fraction depends significantly on the non-furnace processing technology. Thus, for the larger the bucket and the longer the casting the longer the modification effect is required. One of the methods to achieve this is to increase the particle size of the modifier to 50 mm. When intraform processing of cast iron with spherical and vermicular graphite, magnesium-containing modifiers have strict limits on the upper size (4...5 mm), and in addition, the content of small fractions (less than 0.6...1 mm) is not allowed.The use of «heavy» magnesium-containing ligatures for spheroidizing modification of cast iron in order to obtain higher physical and mechanical properties has scientific and practical interest. Numerous studies show that for maximum effect the formation of the structure of the spheroidal graphite, dispersed pearlite metallic base of SGI (spheroidal graphite iron) relevant question is not only selection of the chemical composition of magnesium alloys, but also of the fractional composition, as well as effective method of input into the liquid melt.The purpose of this work was to study the technological features of obtaining cast iron with spherical graphite by bucket modification of copper-magnesium ligature.The researchers used a Leo–1420 scanning microscope, a Polam l-213 optical microscope, and a VEGA II LMU electron microscope with an INCA ENERGY 350 microanalyzer. High-speed induction melting plant, a set of equipment for analyzing the technological and mechanical properties of high-strength cast iron were used.Earlier experimental studies have shown the real possibility of obtaining in the laboratory a «heavy» copper-magnesium alloys as the alloying of magnesium metal with copper, followed by rapid cooling with use of rolling and plastic deformation of powder alloys. Analysis of test results of samples of such alloys showed that it depends on the value of its additives into liquid iron in the structure of formed graphite phase in compacted and globular form. At the same time, the metal base of cast iron is additionally alloyed with copper, which has a favorable effect on the strength characteristics of SGI.However, an urgent problem is the possibility of the appearance of a cementite phase in the structure of high-strength cast iron as a result of its increased supercooling due to the process of spheroidization of the graphite phase. This phenomenon is compounded by the fact that the copper-magnesium ligature, in contrast to the «light» ligature, does not contain silicon active graphitizer. This feature must be taken into account when obtaining high-strength cast iron of high grades.

scholarly journals Effect of silicon carbide modifiers on the physical-mechanical properties of gray cast iron and cast iron with spheroidal graphite

2021 ◽  
Vol 340 ◽  
pp. 01006
Author(s):  
Vladimir A. Poluboyarov ◽  
Anatoliy N. Cherepanov ◽  
Viktor A. Kuznetsov ◽  
Zoya A. Korotaeva ◽  
Alexander A. Zhdanok
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Wear Resistance ◽  
Cast Iron ◽  
Gray Cast Iron ◽  
Term Treatment ◽  
Gray Cast ◽  
Spheroidal Graphite ◽  
Short Term Treatment ◽  
Maximal Increase

The influence of mechanochemically produced modifiers on the properties of cast iron at out-of-furnace modification has been studied. Short-term treatment in mechanochemical activators makes it possible to produce composite modifiers, which are wetted with iron melts, are uniformly distributed therein and effectively influence the crystallization processes. The effect of a modifier based on silicon carbide and chromium (as a protector metal) on the physical-mechanical properties of gray cast-iron and cast-iron with spheroidal graphite is considered. The introduction of SiC in the amount of 0.01-0.1 wt.% into gray cast iron causes the formation of mainly perlitic structure and, as a consequence, an increase in strength, hardness and wear resistance. For SiC content 0.1 wt.%, the tensile strength of GG-15 samples increased by 22.7%, GG-25 by 8%. The maximal increase in the hardness is observed for SiC concentration: for GG-15 – 0.1, for GG-25 – 0.01 wt.%. The GG-25 sample with 0.1 wt.% SiC exhibited the highest wear resistance. The introduction of SiC (0.01 – 0.1 wt.%) into cast iron with spheroidal graphite causes an increase in ferrite content, which promotes a substantial increase in impact viscosity and wear resistance (the highest wear resistance is observed with the introduction of 0.05 wt.% SiC).

Effect of electrocontact surfacing on the wear resistance of high-strength cast iron

1979 ◽  
Vol 14 (5) ◽  
pp. 537-539
Author(s):  
A. I. Domrachev ◽  
G. S. Samokhvalov ◽  
V. M. Yagovkin
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
High Strength
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