Knowledge

How to deal with the locking problem of non-standard screws and the precautions of special screws Non-standard screws refer to screws that have corros

Cold heading steel is a kind of high strength steel, which is widely used in machinery manufacturing, automobile manufacturing, construction, railway

According to the development of social level, the high strength bolt needs to be improved constantly. However, there are still some problems in the hi

Surface treatment of self-tapping screws : Most self-tapping screws are coated with galvanized or zinc phosphate. Cadmium plating is rarely used becau

The zinc agent for dipping before hot-dip galvanizing of steel wire is to make the iron matrix on the surface of the steel wire react with the zinc so

1. Appearance quality requirements The appearance inspection of the screw is to inspect the appearance, plating layer and other aspects. Second, the i

Pickling is to remove the oxide film on the metal material, and while removing the oxide film, a layer of phosphate film should be formed on the surfa

SWCH22A This material is specified in JIS G3539 and is called Carbon Steel Wire for cold heading and cold forging. SWRCH22A SWCH: (steel wire cold hea

Precision screws referred to as small screws, also known as micro screws, is a small fastener connecting product materials, the shape is small, but in

SCM440 is a commonly used steel for the production of high-strength fasteners. The product has the advantages of stable composition, low harmful eleme

SCr440 is an alloy structural steel, is the most commonly used alloy structural steel, tensile strength, yield strength and hardenability are higher t

1. Introduction: AISI1022 is a widely used carbon structural steel with high strength and wear resistance. It is produced by the steel industry using