Grip Precision Fasteners

Grip Precision Fasteners

Grip precision fasteners Quick Details Place of Origin:Guangdong, China (Mainland), Guangdong, China (Mainland) Brand Name:Pingood, Pingood Model Number:PG18 Standard:GB Material:Carbon Steel Surface treatment:Zinc Plated Polished Certificate:ISO9001:2015 Color:Zinc White Size:Customized Price...

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Product Details

Grip precision fasteners

Quick Details

Place of Origin:Guangdong, China (Mainland), Guangdong, China (Mainland)

Brand Name:Pingood, Pingood

Model Number:PG18

Standard:GB

Material:Carbon Steel

Surface treatment:Zinc Plated Polished

Certificate:ISO9001:2015

Color:Zinc White

Size:Customized

Price Terms:FOB,CIF,CRF,EXW and others

Delivery Time:Within 20 workdays after receive payment

Model:Pg18

 

Packaging & Delivery

Packaging Details

opp bag/carton

Delivery Time

7 days

 

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Our Certificates

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Production Process

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Test Equipment

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Cooperation Partner

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Trade Show

Main Markets

Total Revenue(%)

Southeast Asia

20%

South Asia

20%

Mid East

20%

Eastern Europe

18%

Northern Europe

10%

North America

10%

Africa

2%

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Packaging & Shipping

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 The heat treatment of fasteners, in addition to the general quality inspection and control, there are some special quality inspection and control.

    First, decarbonization and carburizing

    In the process of mass production of heat treatment, the metallographic method is also good, micro-hardness method is also good, can only be regular sampling.

Because of its long inspection time, the cost is high. In order to timely determine the carbon control of the furnace, preliminary determinations of decarburization and carburization can be made using spark detection and Rockwell hardness testing. Spark detection is to quench the fire parts, in the grinder from the table and gently grinding sparks to determine the surface and the heart of the carbon is the same. Of course, this requires the operator to have skilled skills and spark identification capabilities. Rockwell hardness testing is performed on one side of a hex bolt. First, a hexagonal plane of the quenched part was lightly polished with sandpaper to measure the first Rockwell hardness. Then grind this surface to about 0.5 mm on the grinder and measure the Rockwell hardness again. If the two hardness values are basically the same, it means neither decarburization nor carburization. If the previous hardness is lower than the last hardness, surface decarburization is indicated. When the previous hardness is higher than the last time, surface carburization is explained. Under normal circumstances, when the hardness difference is less than 5HRC, the decarburization or carburizing of the part is basically within the acceptable range when examined by the metallographic method or the microhardness method.

    

 

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