Sfero dökme demirin yoğunluğu yaklaşık 7,3 g/cm3 veya 7,3 kg/litre veya 119,6 g/cm3’tür. Bununla birlikte, malzeme kalitesi ve büzülme seviyesi nedeniyle, yoğunluk belirli bir değişkenlik aralığına sahiptir.
Diğer bir deyişle, dökümhanenin kullandığı pik demirin kalitesi daha iyi ve büzülme oranı daha küçük ise, sfero dökümün yoğunluğu daha yüksek olacaktır. Aksi takdirde, sfero dökümün yoğunluğu daha düşük olacaktır. Bu nedenle, 7,1 ila 7,3 g/cm3 arasındadır.
Demir dökümhaneleri genellikle sfero döküm hacmini hesaplayarak kaba dökümlerin ağırlığını tahmin eder, bu nedenle yoğunluk kullanılacaktır. Ancak, dökümlerin kalitesini yalnızca yoğunluğa göre yargılayamazsınız.
Küreselleşme hızı ve soğuma hızı gibi onu etkileyecek daha fazla faktör vardır. Bu nedenle, bu aralıkta makul olacaktır.
Die Dichte von duktilem Gusseisen beträgt ungefähr 7,3 g/cm3 oder 7,3 kg/Liter oder 119,6 g/cm3. Aufgrund der Materialgüte und des Schrumpfgrades weist die Dichte jedoch eine gewisse Schwankungsbreite auf.
Mit anderen Worten, wenn die Qualität des von der Eisengießerei verwendeten Roheisens besser und die Schrumpfrate geringer ist, wird die Dichte des duktilen Gusseisens höher. Andernfalls ist die Dichte von Sphäroguss geringer. Daher reicht er von 7,1 bis 7,3 g/cm3.
Eisengießereien schätzen das Gewicht von Rohgussteilen normalerweise durch Berechnung des Volumens von Sphäroguss, daher wird die Dichte verwendet. Sie können die Qualität von Gussteilen jedoch nicht allein anhand der Dichte beurteilen.
Es gibt weitere Faktoren, die sich darauf auswirken, wie die Sphäroidisierungsrate und die Abkühlrate. Daher wird es innerhalb dieses Bereichs vernünftig sein.
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Advantages and disadvantages of stainless steel casting process
Everyone in the casting industry knows a fact. That is the mechanical properties of stainless steel casting are higher than that of cast iron, but its casting performance is worse than that of cast iron. Stainless steel casting belongs to investment or precision casting, with relatively high melting point. The molten steel is easily oxidized, due to poor fluidity and large shrinkage rate. From a practical perspective, stainless steel casting is suitable for casting of various types and alloys.
Advantages and disadvantages of the stainless steel casting process are as below:
First, due to the poor liquidity of the molten steel, the wall thickness of the steel castings should not be less than 8 mm, in order to prevent the cold shut and misrun. The structure of the pouring system strives to be simple, and the sectional dimension is larger than that of cast iron. Adopt dry casting or hot casting, and the casting temperature should be appropriately increased to 1520-1600 ℃. The fluidity can be improved since the casting temperature is high with large superheat, thus the liquid stays for a long time.
However, if the pouring temperature is too high, it will cause defects such as coarse grains, hot cracks, pores and sand burning. Therefore, the casting temperature of small, thin-walled and complex casting should be at the melting point +150 ℃; and of large, thick-walled casting +100 ℃.
We must take these measures to prevent the occurrence of shrinkage holes and cracks in stainless steel castings. 1. Making the wall thickness uniform, and avoid sharp and right angle structures, 2. Adding sawdust to sand mold, and coke to sand core. 3. Adopting hollow sand core and oil sand core to change the deformability and permeability of the sand mold and core.
https://www.yidecasting.com/wp-content/uploads/2020/08/precision-casting.jpg300268Yide Castinghttp://www.yidecasting.com/wp-content/uploads/2020/05/YiDe-iron-casting-manufacturer-logo-300x137.pngYide Casting2021-12-30 02:33:062023-06-16 02:49:12Advantages and Disadvantages of Stainless Steel Casting Process
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The density of ductile cast iron is approximately 7.3 g/cm3, or 7.3 kg/liter, or 119.6 g/cm3. However, due to the material grade and shrinkage level, the density has a certain range of variation.
In other words, if the quality of pig iron used by the iron foundry is better and the shrinkage rate is smaller, then the density of ductile iron will be higher. Otherwise, the density of ductile iron will be lower. Therefore, it ranges from 7.1 to 7.3 g/cm3.
Iron foundries usually estimate the weight of rough castings by calculating the volume of ductile iron, so the density will be used. However, you cannot judge the quality of castings by density alone.
There are more factors that will affect it, such as spheroidization rate and cooling rate. Hence, it will be reasonable within this range.
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With the implementation of “Made in China 2025” and “One Belt One Road” construction, the rapid development of all walks of life will be promoted. At the same time, the scale of China’s metal casting enterprises is also increasing year by year.
With the rapid development of various application fields, industry concentration has gradually increased, and product quality has continued to improve. This shows that the foundry industry has entered a medium-to-high-speed development stage.
The China (Beijing) International Foundry Exhibition will continue to be held at the China International Exhibition Center (new hall). In this way, it promotes the innovation and development of the foundry industry and promotes in-depth cooperation and exchanges between enterprises.
As a foundry with a history of more than 20 years, Yide Casting will take this opportunity to meet the needs of different customers in countries along the “Belt and Road” with high quality, high technology and high quality. Use better cast iron products to show the world the capabilities of China’s manufacturing.
https://www.yidecasting.com/wp-content/uploads/2021/12/fully-automatic-casting-lines2.jpg339720Yide Castinghttp://www.yidecasting.com/wp-content/uploads/2020/05/YiDe-iron-casting-manufacturer-logo-300x137.pngYide Casting2021-12-29 12:57:392023-06-16 02:49:172025 Made in China and ONE BELT, ONE ROAD Policy Impact on Iron Foundry
