The density difference between cast steel balls and forged steel balls

Everyone knows that the relative density of cast steel balls is different from that of forged steel balls, but do you know the specific difference?

First of all, cast steel balls refer to "iron balls". Whether from the traditional definition or the basic core concept, it is known that the density of iron is low, while forged steel balls are stainless steel plates, so the relative density is high. At 7.85Kg/m³, what is the relative density of cast steel balls?

First of all, we must first understand what wrought iron and cast iron mean?

Wrought iron is an alias, which refers to stainless steel plates. In terms of composition, it is an iron-carbon alloy with a carbon content of less than 2.11% (or 1.40%) and a relative density of 7.85kg/m³. According to this kind of relative density, the stainless steel plate after the smelting plant, after undergoing inspection, meets the organic chemical category of the steel used for steel balls, and then forging (rolling) to produce steel balls of the specifications and models required by customers, so forging (rolling) steel balls The relative density is 7.85Kg/m³.

Cast iron is an iron-carbon alloy with a carbon content of more than 2.11% (or 1.40%), and iron castings are aluminum die castings. As far as cast iron itself is concerned, even if the composition is the same but the manufacturing standards are different, the relative density will be very different. For example: the same is a 70mm steel ball abrasive tool, the net weight of the abrasive tool with four steel balls is 46Kg, and the net weight of the abrasive tool with six steel balls is 35Kg.

From this point, it can be analyzed that: the total number of abrasive steel balls is large, and the production volume is high, but the weight of the abrasive tool itself is lighter, the total number of abrasive steel balls is small, the production volume is low, but the net weight of the abrasive tool itself. This is the big difference, and it is precisely because of this that the quality of cast steel balls is determined (ordinary high school, low and medium chromium balls can be used, but the higher the aluminum alloy composition, the larger the specifications and models, the heat treatment There will be problems in the process, such as bursts, etc., which are caused by internal looseness. The self-abrasive tool is light and will be caused by the buoyancy of water. In fact, this problem is all caused by relative density from the source).

That is, the relative density of squeeze cast iron is much higher than that of sand cast iron. Under normal conditions, the relative density of gray cast iron is: 7.25Kg/m³; white pig iron is: 7.55Kg/m³; malleable cast iron is: 7.3Kg /m³.

Here is another new problem, what is gray cast iron, white cast iron, malleable cast iron? Popularly speaking, white cast iron appears as white cast iron at the interface. This type of situation reflects that white cast iron has high hardness, high ductility and difficult production and processing.

If analyzed from the metallographic analysis, it will be found that the high-purity graphite of malleable cast iron is in the form of agglomerates, the high-purity graphite of white pig iron exists in the shape of cementite, and the high-purity graphite in gray cast iron is in the form of lumps. In specific daily life, you can also take an iron nail to scratch the surface to feel the strength. The hardest is white cast iron, and gray cast iron is generally softer. You can also knock it with a hammer, the sound is blocked by gray cast iron, and the most fragile sound is white cast iron.

If you are interested in the content of steel balls, please visit Changzhou Feige Steel Ball Manufacturing Co., Ltd., a high-quality steel ball manufacturer from China that accepts steel ball customization and steel ball processing.