Properties and characteristics of gray cast iron
1. Mechanical properties (1) Tensile strength: the tensile strength of gray cast iron is generally 100 ~ 350 MPa, which […]
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Lifting Faraday compression fatigue test of gray cast iron
The tension compression fatigue tests of three grades of gray cast iron are carried out on plg-100 high frequency fatigue
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Inspection of nodular cast iron end cover castings after welding
After the above WPS preparation, WPQR welding procedure qualification test shall be carried out to determine the WPS process reliability.
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Melting and casting production control of vermicular graphite cast iron brake disc
1. Melting process of alloy vermicular graphite cast iron for brake disc (1) Raw materials and chemical composition Pig iron,
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Production of gray iron castings
Gray cast iron characterized by flake graphite has certain strength, hardness, elastic modulus, shock absorption, wear resistance and thermal conductivity,
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Low frequency tension compression fatigue test of gray cast iron
The low-frequency tension compression fatigue test of gray cast iron adopts MTS810 axial tension compression fatigue test machine. It uses
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Future planning of ZHY casting in gray cast iron and nodular cast iron
From 2015 to 2019, the wind power market was constantly changing and experienced two rush loading peaks of wind power.
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Effect of pouring speed on black spot defect of diesel engine cast iron cylinder liner
In the solidification process of liquid metal in centrifugal casting, too slow pouring speed will promote the formation of layered
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Effect of microstructure hardness on black spot defect of diesel engine cast iron cylinder liner
Generally, the hardness of cylinder liner in the qualified layer is hb225 ~ HB240, and the overall hardness difference of
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Comprehensive failure analysis of QT800-3 nodular cast iron crankshaft
Based on all the previous analysis, the fracture process of nodular cast iron crankshaft is as follows: in the induction
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Tension compression fatigue specimen of gray cast iron
The tension compression fatigue test of gray cast iron mainly studies the effects of loading frequency and surface roughness on
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ZHY casting gray cast iron and nodular cast iron wind power castings
Casting refers to pouring molten metal into the mold, cooling and forming to form a casting that meets the relevant
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Prevention of shrinkage porosity of nodular iron castings
1. Chemical composition control The chemical composition of nodular cast iron for wind turbine shall be strictly controlled, especially C,
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Failure analysis of QT800-3 nodular cast iron crankshaft
As shown in Figure 1, cut the metallographic sample close to the crack source, and then conduct rough grinding, fine
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Tensile test on fatigue properties of gray cast iron
The test materials are three grades of gray cast iron, namely ordinary HT250, low alloy HT250 and HT300, in which
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Technological measures for reducing casting porosity defects in green sand casting of heavy vehicle cylinder head
1. Improvement of gating system 1.1 The intermediate injection water inlet is improved to the top injection water inlet At
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Single point fatigue test method for metal casting materials
Single point fatigue test is applicable to the service of metal components under rotating bending load at room temperature, high
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Elimination of casting porosity in stainless steel butterfly valve body and control of melting and pouring temperature
After SAF2507 is smelted to 1 670 ~ 1 700 ℃, turn off the power supply and let it stand
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Heat treatment process of bainite Martian multiphase wear resistant cast steel for lining plate of cone crusher
The research content comes from the school enterprise cooperation projects “research and development of new cone crusher liner” and “research
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Role of alloying elements in metal casting
A large number of experimental studies have proved that in general, the higher the purity of metal, the better its
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Identification of casting pores in super duplex stainless steel butterfly valve body
The valve body of seawater butterfly valve with nominal size of DN1200 is made of 00Cr25Ni7Mo4N, with a gross weight
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Effect of heat treatment process on bainitic Martian multiphase wear resistant cast steel
There are two traditional methods to obtain bainitic steel: (1) Isothermal quenching method: heat the steel to a certain temperature
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Elimination of casting porosity in stainless steel butterfly valve body and control of steelmaking raw materials
(1) Proportion control of new material and returned material. The main chemical composition of SAF2507 super duplex stainless steel is
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Analysis on the formation of casting pores in the valve body of super duplex stainless steel butterfly valve
(1) Cause analysis of formation of porosity in invasive casting. The total amount and rate of gas produced by molding
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Effect of microstructure of bainite martensite composite wear resistant cast steel
As shown in Figure 1, the types of bainite structure include upper bainite, lower bainite, carbide free bainite, granular bainite,
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Fatigue failure process and mechanism of metal casting
In fact, the fatigue failure of materials is mainly due to the irreversible change of the material structure. When the
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Prevention and treatment of casting porosity in sand coated iron mold cylinder block casting
1. Increase the section size of the internal sprue In order to reduce the large amount of gas generated by
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Improvement and production verification of a new vibrating table for lost foam casting
The flywheel housing is placed vertically in the lost foam casting sand box (as shown in Fig. 1), and there
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Control of ambient temperature and humidity for eliminating casting pores in stainless steel butterfly valve body
The curing rate of resin self hardening sand increases with the increase of ambient temperature (including raw sand temperature). When
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Effect of composition of bainitic Martian multiphase wear resistant cast steel
The chemical composition has a great influence on the mechanical properties and microstructure of bainitic Martian multiphase wear-resistant cast steel.