Uncovering Valve Cost Composition: From Castings to Finish Machining
Although a valve may seem like a simple industrial component, its cost composition is extremely complex, involving multiple links from basic materials to precision manufacturing, and from labor input to technological know-how.
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Differences Between Carbon Steel and Stainless Steel
It mainly refers to steel whose mechanical properties depend on the carbon content in the steel and generally does not contain a large amount of alloying elements, sometimes also called mild carbon steel or plain carbon steel.
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Cause Analysis of Defects in Valve Castings During Production
1. BlowholesThese are small cavities formed in the metal by gas that fails to escape during the metal solidification process. Their inner walls are smooth with gas trapped inside, exhibiting high ultrasonic reflectivity. However, as they are basically spherical or ellipsoidal (i.e., point defects), the amplitude of their reflected waves is affected. Blowholes in steel ingots are flattened into area-type defects after forging or rolling, making them easier to detect by ultrasonic testing.
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The Use and Properties of Low Alloy Steel
Low alloy steel refers to alloy steel with a total alloying element content of less than 5%. Low alloy steel is relative to carbon steel, and is intentionally added with one or several alloying elements to improve the performance of steel based on carbon steel. When the amount of alloy added exceeds the normal production method of carbon steel, this type of steel is called alloy steel. When the total alloy content is less than 5%, it is called low alloy steel, ordinary alloy steel is generally b
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The Historical Development of Duplex Stainless Steel
Duplex stainless steel (DSS) refers to stainless steel with ferrite and austenite each accounting for about 50%, and generally requiring at least 30% of the lower phase content. In the case of low C content, the Cr content ranges from 18% to 28%, and the Ni content ranges from 3% to 10%. Some steels also contain alloying elements such as Mo, Cu, Nb, Ti, and N.
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List of Recommended Innovative Small and Medium sized Enterprises for the Fourth Quarter of 2023 in Lishui City
According to the "Management Measures for the Recognition of Science and Technology oriented Small and Medium sized Enterprises in Zhejiang Province" (Zhe Ke Fa Gao [2016] No. 88), after reviewing the application materials recommended by the science and technology bureaus of each county (city, district), Jingning Economic and Commercial Science and Technology Bureau, and Development Zone Economic and Trade Bureau, 267 enterprises including Jinyun Rapid Sawing Technology Co., Ltd. meet the recogn
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