Application of Nb element as grain refinement material in cast steel
Nb has strong affinity with oxygen, nitrogen and carbon in steel, and its function is similar to that of Ti. […]
Nb has strong affinity with oxygen, nitrogen and carbon in steel, and its function is similar to that of Ti. […]
More than 50 years ago, J.F. Wallace and his research team studied the role of various materials as grain refiners
Foundry industry in various industrial countries has paid more attention to grain refinement of cast steel for more than 60
In recent years, for the consideration of sustainable development, in the application of steel castings, on the one hand, it
In the early 1920s, both a.m. Meehan and Crosby of the United States began to discuss the inoculation treatment technology
The formation of grain core is called nucleation. There are two different ways of nucleation in liquid metal crystallization (1)
For all kinds of cast alloys, grain refinement is an important measure to improve the metallurgical quality. If the grain
With the rapid development of automotive industry in recent years, in order to protect the environment, automotive manufacturers are striving
Casting steel of supercritical unit steam turbine block is one of the important parts of thermal power unit. High-pressure inner
In order to ensure the performance of turbocharger shell at 1050 ℃, a high nickel (20wt%) austenitic steel ASTM HK40
In casting production, gating system is one of the important factors that affect the quality of castings. According to the
The riser design of cast steel joint mainly depends on the solidification characteristics of cast steel. There is a large
The difficulty of making the foam model is that the size of the cast steel joints is large, the width
At present, the traditional casting technology of riser plus allowance is generally used in the production of large cast steel
The volume fraction (3.3% – 4.6%) of M7C3 carbide calculated from two-step thermokinetics corresponds to the result (3.6% – 4.8%)
Ball mill is the key equipment for grinding materials. It is widely used in silicate products, such as new building
1 Smelting process First, scrap steel and pig iron are added to the 500 kg acid intermediate frequency electric furnace
At present, the chemical composition of the mainstream high chromium cast iron at home and abroad are: carbon 2.4% –
The ball mill for cement industry mainly uses two kinds of wear-resistant products, namely grinding ball and lining plate. In
Micro morphology of worn surface The metallographic structure of the wear surface of the high chromium lining plate was observed
The test results show that the microstructure of the high chromium cast steel is: tempered martensite + eutectic carbide +
The composition of white corundum is α – Al2O3, its content is over 98% – 99%, the impurity is very
(1) The simulation analysis diagram of scheme I is the simulation result of solidification process of scheme I. It can
Cement rotary kiln is the main equipment of cement clinker dry process and wet process production line. Driven by the
Sand inclusion refers to that there is a layer of metal lump or sheet on the surface of the casting,
The bad spheroidization means that the spheroidization does not achieve the expected effect. The metallographic structure of poor spheroidization is:
1.Deformation Long and plate castings are easy to deform. After some castings are processed, they will deform after a period
In the thick section of the casting, at the hot spot or the axis where the final solidification takes place,
Inside, on or near the surface of the casting, there are smooth holes of different sizes, round, long and irregular
1. EPC is suitable for the production of steel castings. Some measures can be taken to produce low carbon steel