Shrinkage cavity and porosity defects are common defects in casting production. One of the purposes of numerical simulation of casting
The casting defects of coupler tongue include crack, sand inclusion, mechanical sand sticking and other defects. In the actual trial
After years of development, the prediction criterion of shrinkage porosity and shrinkage defects of steel castings has reached a high
According to the summary, a total of 50 casting defects were found in 24 cast steel joints, and the average
Shrinkage cavity and porosity defect is one of the most common defects in the casting process. The prediction of the
Many parts of construction machinery such as bulldozers and excavators are cast steel castings, which often have shrinkage defects. Light
The main casting defects of coupler body include crack, air hole, sand inclusion and mechanical sand sticking. The main parts
Different steel casting production processes determine different production processes, but they can be basically divided into process design, model making,
The steel castings were trial produced in two batches, and the first time was qualified, and the second time there
In order to verify the feasibility and universality of the proposed process design improvement method, three typical steel castings produced
The shrinkage rates of several common iron carbon alloys are shown in the table. It can be seen from the
Through the production verification of product k141 and the implementation of lack of vision countermeasures, it can be seen that
The acceptance specifications of steel castings have realized that the outer surface of steel castings is more important, because the
Casting is a process for producing products with liquid metal. The basic technology in mechanical industry includes manufacturing, welding, forging
The basic cause of concentrated shrinkage defects in castings is that the liquid shrinkage and solidification shrinkage of the alloy
Firstly, the basic process flow of trial production of coupler products, the main process equipment and process methods used by
In terms of detection methods, GB7233-09 focuses on the near-field area of ultrasonic flaw detection, and adds a near-field resolution
The cracks of the motor shell are typical thermal cracks. There are more than 40 cracks and more than 80
The total number of cracks in the motor shell produced by furan resin sand casting process is about 70, while
According to the previous casting simulation results, it is found that the process riser of the steel casting plant is
The sand inclusion casting defects of steel castings are relatively serious, because the proportion of product scrapping caused by sand
The orthogonal experiment will be designed, the riser height is set as the independent variable, and other process parameters remain
(1) Ultrasonic flaw detection of cast steel joints can not cover all flaw detection areas, nor can it completely and
Casting sand inclusion defects are directly related to production process, mold, sand mixing, molding, core making, lower core box, pouring
(1) Through the non-destructive testing of 24 cast steel joints, it is found that the distribution of casting defects seems
According to the flaw detection results, there are many casting defects in the cast steel joints, and many casting defects
The ultrasonic testing standard for carbon steel, low alloy steel and martensitic stainless steel castings (astm-609 / 609m), ultrasonic testing
According to the relative position of the internal sprue on the steel casting, the casting system can generally be divided
The new and old specifications of steel castings in China, methods for ultrasonic flaw detection and quality assessment of steel
Hot crack defect refers to the casting defect when the solid rate of steel castings is close to 1.0 at
