News

Oct22

Why Is the Scrap Rate of Castings So High? — Cause Analysis and Countermeasures for Iron Inclusions on the Surface of Silica Sol Castings

Since China introduced the silica sol shell production process, the investment casting (lost-wax precision casting) production in China has achieved rapid development and significant progress. In response to the development of the casting industry in recent years, competition within the industry has become increasingly fierce, with comparisons made across raw materials, equipment, processes, and other aspects. Meanwhile, customers have put forward higher and higher requirements for casting quality.

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Oct21

What Are the Differences Between Cast Iron and Cast Steel?

The main differences in chemical composition between cast iron and cast steel lie in their carbon content and the content of other alloying elements. Cast iron is an iron alloy containing 2% to 4% carbon, while cast steel is a steel alloy with a lower carbon content, typically ranging from 0.2% to 1.5%.

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Oct20

Why is the Silica Sol Casting Process So Expensive?

Many of my friends have asked me this question: Why is silica sol casting so expensive? Here, I will explain the core value of silica sol casting. First of all, as a buyer, you need to understand what casting is. Casting involves melting metal, creating a mold, and pouring the molten metal into the mold. After solidification, there is a method to form metal parts with a certain shape, size, and performance. There are three main casting methods: sand casting, permanent mold casting, and investment casting (lost-wax casting).

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Oct17

Sand Casting and Precision Casting (Investment Casting)

During the production preparation for sand casting, it is necessary to formulate a reasonable casting process plan and draw a casting process diagram.A casting process diagram is a graph that shows the casting process plan with various process symbols on the part drawing. It includes the pouring position of the casting, the parting surface of the mold, the number, shape, fixing method and sequence of cores, as well as the amount of remaining machining allowance, draft angle, shrinkage rate, gating system, riser, and the size and layout of chillers. The casting process diagram is a basic technical document that guides pattern design (core box), production preparation, mold manufacturing and casting inspection.

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Oct16

Pickling and Passivation of Stainless Steel Castings

The method of removing scale and rust from the surface of steel using an acid solution is called pickling. It is a technique for cleaning metal surfaces and is usually performed in conjunction with pre-passivation treatment. Typically, parts are immersed in an aqueous solution (such as sulfuric acid) to remove the oxide film on the metal surface. It serves as a pre-treatment or intermediate treatment for processes like electroplating, enameling, and rolling.

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Oct15

Avoiding Vibration and Fulcrum Control of Cast Iron Platforms During Inspection

The fulcrums of a cast iron platform are set differently according to its specifications. Generally, small-sized flat plates are equipped with three support points: two at one longitudinal end and one at the transverse center of the other end. This fulcrum arrangement ensures the stability of the flat plate while facilitating adjustment for users. For cast iron flat plates with a size exceeding 2000mm, additional support points are required; large-sized flat plates are typically designed with one support point every 1000mm. During the production, verification, and use of the flat plate, the position of its main support points may change due to bracket deformation or other factors. When adjusting the support points of a cast iron flat plate, a common practice is to first support three points along a line—even for large flat plates, three main support points should be properly positioned first, while the remaining points serve as auxiliary supports and can be fine-tuned after the flat plate is basically stabilized.

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