Year1
- 规格：
- 219-3500mm
- 规格：
- 6-28
Hardness index of anti-corrosion spiral steel pipe: The ability of a metal material to resist the indentation of the surface by hard objects is called hardness. According to the test method and application scope, different hardness can be divided into Brinell hardness, Rockwell hardness, Vickers hardness, Shore hardness, microhardness and high temperature hardness. For anti-corrosion spiral steel pipes, three commonly used hardnesses are Brinell, Rockwell and Vickers hardness. , Brinell hardness (
#Use a steel ball or cemented carbide ball of a certain diameter to press into the surface of the sample with a specified test force. After the specified holding time, remove the test force and measure the indentation diameter of the sample surface. Brinell hardness The value is the quotient obtained by dividing the test force by the indentation spherical surface area., Rockwell hardness
#The Rockwell hardness test is an indentation test method like the Brinell hardness test. The difference is that it measures indentation Depth. That is, under the sequential action of the initial test force and the total test force, the indenter (cone or steel ball of the gold steel mill) is pressed into the surface of the sample and the residual indentation is measured after the main test force is removed after the specified holding time. Depth increment is used to calculate the hardness value. Vickers hardness After the test surface has been maintained for a specified time, the test force is removed and the length of the two diagonals of the indentation is measured.
#Vickers hardness value is the quotient obtained by dividing the test force by the indentation surface area. The calculation formula is # where:-- Vickers hardness symbol/
#--Test force
#-The arithmetic mean of the two diagonals of the indentation.
#The test force used for Vickers hardness is (.), (. ), (.), (.), (.), (.) () and other six measurable hardness values range from ~. Anti-corrosion spiral steel pipe storage construction
? Editor # Anti-corrosion spiral steel pipe Precautions 1. Construction When installing, you should check whether groundwater and rainwater have come into contact with the pipe. If water comes into contact with the pipe, the pipe jacket should be dried. 2. When installing the pipe, you should handle it with care, and prohibit impact and falling. 3. The insulation layer of the insulated pipe is prohibited Collision with the burning fire prevents the insulation layer from being burned down. 4. Pipes and fittings should be stored on a relatively flat ground and neatly stacked at a height of no more than 1 meter.
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