During the operation of the steam turbine, high-temperature bolts, as key fasteners, bear enormous thermal and mechanical stresses. Therefore, the performance of high-temperature bolts is crucial for the reliable operation of steam turbines. From the perspective of bolt manufacturing, analyze the impact of material selection, heat treatment process, manufacturing process, and other aspects on its performance.

Firstly, the material selection of bolts is crucial to ensure their excellent performance in high-temperature environments. In steam turbines, commonly used materials include alloy structural steel, stainless steel, etc. Among them, alloy structural steel is widely used in the manufacturing of high-temperature bolts due to its excellent mechanical properties and heat resistance.

Secondly, the heat treatment process is a key step in improving the performance of bolts. For high-temperature bolts, the following heat treatment processes are usually used: annealing, normalizing, quenching, and tempering. A reasonable heat treatment process can balance the strength, toughness, and oxidation resistance of high-temperature bolts, ensuring their stable performance in high-temperature environments.

In addition, manufacturing processes also have a significant impact on the performance of bolts. Common manufacturing processes include forging, hot rolling, cold rolling, extrusion, stretching, etc. These processes will affect the grain size, shape, and distribution of bolts, thereby affecting their performance. For example, forging can improve strength and toughness, and improve grain structure. Rolling and stretching mainly change size and shape.

In addition, manufacturing processes can also affect the surface quality of bolts, such as roughness and defects, which can also affect the performance of bolts in high-temperature environments.

Reasonable selection and handling can ensure that bolts have good performance in high-temperature environments, thereby ensuring the reliable operation of the steam turbine. In practical applications, attention should also be paid to factors such as the usage environment, temperature, pressure, and medium of bolts to ensure their safe and reliable use.

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Valve Handle (#1 #2) 33Cr3MoWV Steam Turbine LP main steam valveForced-draft blower Cooling fan 9-19No 5A
sixth stage moving blade 40Mn18Cr4V Steam Turbine LP inner cylinderCoal mill Hydraulic relief valve HMP-014/350
Coal mill Filter 20MG00.21.30.01
Positioning bolt M120*4 2Cr12NiW1MolV Steam Turbine RSVKEY GB1096-79 25Cr2Mo1VA Steam Turbine High Pressure CylinderCoal mill Medium-speed pulverizer oil seal 300MG53.11.09-序35
Primary fan Exciting end sealing tile oil baffle HU25246-222G
Coal mill Medium-speed pulverizer roller baffle 300MG32.11.09.76
Steam turbine Nut (Phase I medium pressure regulating valve)