CB2 cast steel is a 9%~12%cr martensitic heat-resistant steel with a composition of 0.13c-9cr-1.5mo-1co-vnbnb, which is obtained by reducing C, adding CO and adjusting the content of N and B on the basis of B2 cast steel in cost522 R & D plan. Its alloying principle is as follows:...
CB2 cast steel is 9CrMoVNbB steel, and its trial produced steel castings have an extrapolated endurance strength of 85mpa at 625 ℃ for 100000 hours. The high temperature endurance strength is better than that of GX12CrMoWVNbN10-1-1 steel used in the previous generation of steam turbine steel castings, and the...
The performance indexes of zirconium free composite cast steel coating 405B (hereinafter referred to as tl405b) are shown in the table below. Paint Applicable material Baume degree (° B é) Specific gravity /g · ml-1 24h suspension (%) Gas evolution /ml · g-1 TL405B Steel castings 120 1.90 96...
In order to ensure the smooth operation of the overall process of cast steel production, while taking into account the yield and effect of rare earth elements, Baotou Rare Earth Research Institute has proposed to use high-purity rare earth ferroalloy as an additive in 00Cr13Ni5Mo super martensitic stainless steel...
The history of the application of rare earth in the field of steel casting can be traced back to the early 1950s. American steel foundries added rare earth to the steel casting used to manufacture armor. It was found that the as cast structure, inclusion morphology, liquid steel fluidity...
Many researchers have found that rare earths have the effect of refining grains. The reason is that on the one hand, the atomic radius of rare earths is large, and the amount of solid solution in cast steel is small. When the grains grow, they are enriched on the...
The inclusions in cast steel have an important impact on the properties of cast steel products. Domestic and foreign scientific and technological workers have carried out a lot of research work in this regard. The results show that the addition of rare earth elements can control the composition, morphology...
(1) Deep deoxidation and desulfurization: rare earth is easy to react with oxygen and sulfur elements in the molten steel of cast steel. The generated rare earth oxygen (sulfur) compounds have the characteristics of high melting point, small specific gravity and strong stability (as shown in the table). Some...
Rare earth (RE) is the general name of 17 metal elements including lanthanide, scandium and yttrium in the periodic table of elements. Metallurgical workers at home and abroad began to study the action mechanism and industrial application technology of trace rare earth elements in steel very early, and found...
There are many tests for statistical distribution, such as KS test, chi square test, etc. from the perspective of graphics, QQ chart or PP chart can also be used to check whether the data obey a certain distribution. As shown in Fig. 1 ~ Fig. 4, the P-P scatter...