Stainless steel product surface brightness problem Stainless steel fasteners are mainly cold heading, in the process of processing the product surface will remain oil and cold heading process carbon deposition, so stainless steel fasteners need to be cleaned to restore their stainless steel color, Read More

Hot dip galvanizing, also known as hot dip zinc and hot dip galvanizing, is an effective way of metal anticorrosion, mainly used in various industries of metal structure facilities. It is to immerse the steel parts after rust removal into zinc solution melted at about 500℃, so that the surface of t Read More

In the assembly process of spring washer, the spring washer directly enlarges and expands outward, which is called rising ring. This phenomenon has a long history, the cause of which was reported half a century ago, but so far there are different opinions, there is no clear conclusion. According Read More

A special type of nut used to weld nuts on thin plates with a spot welder. It is mainly used for sealing plate, panel and other structural parts of welding nut required by electronic panel cabinet of locomotive. Its advantages are high production efficiency, good performance, low energy consumption, Read More

3.1 The full name of the certificate shall be "Fastener test Report F3.1", which is derived from ISO16228 "Types of Fastener Test Documents". The standard mainly provides the content required for fastener product test report, that is, the requirements for product test report, rather than the so-call Read More

304 stainless steel is one of the most widely used chromium - nickel stainless steel, as a widely used steel, has good corrosion resistance, heat resistance, low temperature strength and mechanical properties; Stamping, bending and other thermal processing, no heat treatment hardening phenomenon (u Read More

Electrogalvanizing, also known as cold galvanizing in the industry, is the process of using electrolysis to form uniform, dense and well-combined metal or alloy deposition layer on the surface of the workpiece. Compared with other metals, zinc is relatively cheap and easy to coat a metal, a low val Read More

Stainless steel during hot working, machining or place after a certain period of time the surface will form a layer of black or gray scale, the main ingredients for Cr2O3, NiO and very refractory FeO, Cr2O3, affect the appearance quality, their presence on the one hand, on the other hand also influe Read More

Hot dip galvanizing is to make molten metal and iron matrix reaction and produce alloy layer, so as to combine the matrix and coating. Hot dip galvanizing is the first steel parts pickling, in order to remove iron oxide on the surface of steel parts, pickling, through ammonium chloride or zinc chlo Read More