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Working principle of RH vacuum degassing method and DH vacuum degassing method
Vacuum deaeration Methods- RH and DH Vacuum
Deaeration
Vacuum deaeration is a method used to remove dissolved gases from water or other solutions. There are two main types of vacuum deaeration: RH (recirculation and headspace) and DH (direct headspace) vacuum deaeration. These methods can be use......
1075 
Rachel
Surface Roughness Measurement
Surface roughness measurement Surface roughness measurement is the measure of the small, local irregularities on a surface that extend in a direction perpendicular to the mean plane of the surface. Rough surfaces generally have a much larger friction coefficient, which can cause health and safety r......
Characteristic Causes of Residual Shrinkage Cavity and Its Judgment and Treatment
Introduction
Remaining shrinkage hole is a common defect in castings, caused by a number of possible factors related to the manufacturing process. This paper attempts to thoroughly review the causes and prevention of remaining shrinkage hole defects in investment castings, and to discuss various ......
Turning
Turning
Turning is a machining process in which a cutting tool, typically a non-rotary tool bit, describes a helical toolpath by moving more or less linearly while the workpiece rotates. The tools axes of movement may be literally a linear axis, but they can also be combined into more complex mot......
The Feed Rate of Semi-finishing Carbide Outer Turning Tool in Turning
Turning of Hard alloy External Circle Cutter Half Finish Turning
Hard alloys are materials that have a high work-hardening rate, meaning they harden under the stress of machining or grinding operations. For this reason, they are usually machined using tools that are specially suited to their exac......
Quenching medium
Quenching Media
Quenching is the rapid cooling of a metal part to obtain certain desired properties such as hardness. Quenching media is used to cool the metal part during the quenching process. The use of quenching media can affect the final properties of the part and must be chosen carefully to......
Key Technology of NC Machining Programming for Large Sculpture Surface Parts
Key Technologies for CNC Programming for Large-scale Sculpture Surface Part Processing
Machining of sculpture surfaces such as aircraft, ships, cars and other large-scale surface parts has been increasingly popular in the past few years. Such parts require excellent surface finish and accuracy. T......
Design and construction of large and medium-sized passenger car body pattern
Design and Construction of Bus Body Pattern
Bus is an important public transport tool, and its body shape design has always been an integral part of public transport vehicles. To ensure the safe and reliable operation of buses, its body shape design plays an important role. Therefore, the design......
Prevention and elimination skills of engine "cylinder holding"
Engine Cylinder Holding Prevention and Elimination Techniques
Engine cylinder holding is one of the most common engine failures, which can not only easily cause serious engine damage, but also bring safety hazards. Therefore, it is very important to understand the occurrence conditions and preven......
Valve installation guide and connection method
Installation Guide for Valves and Connection Methods
Valves are plumbing components that regulate the flow of water. In modern plumbing systems, valves are used to control the flow of water in-and-out of pipes, and help to ensure that water pressure is closely monitored. Valves can be used in a n......
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