Let's take you to know the material types of some common springs:

1. Oil quenched and tempered spring steel wire

2. Carbon spring steel wire

3. Carbon spring steel wire for non-mechanical spring

4. Cold rolled tool steel strip

5. Hot rolled wire rod for tempered spring steel wire

6. Chromium-vanadium spring steel wire

7. Chromium-vanadium alloy spring steel wire

8. Silicon manganese alloy spring steel wire

9. Fired chrome silicon alloy spring steel wire

10. Silicon manganese spring steel wire

11. Chromium-vanadium spring steel wire

12. Chromium-silicon spring steel wire

13. Hydrogen embrittlement, cadmium embrittlement and black embrittlement of spring steel: brittle fracture caused by high impurity content in spring material.

After introducing the materials, you may have questions: How long can these materials be used? Can you meet the job requirements? For these problems, our spring factory will plating a layer of elements that will make the spring life longer and more useful for work according to different situations and industries. So what elements will be used? Let's have a look

(1) Zinc plating: zinc is stable in dry air, hardly changes, and is not easy to change color. A white film of zinc oxide or carbonaceous zinc carbonate will be formed in moist air. This dense film prevents further corrosion.

(2) Cadmium plating: cadmium plating is mostly used to protect the spring from corrosion, and cadmium plating is used to protect the inner metal. Since cadmium is an anode relative to iron, the iron metal under it can be protected by the consumption of cadmium plate even when cadmium is pulled or nicked. Generally, cadmium is used as a thin layer (less than 25 μ M or 1mil thick).

(3) Copper plating: copper plating is used for mold casting, nickel plating, chrome plating, silver plating and gold plating to repair worn parts, prevent local carburization and improve conductivity.

(4) Chromium plating: Chromium is a sliver white metal with a slight blue color. The chromium plating layer has a very high hardness, which can vary from 400 to 1200 HV in a large range according to the composition of the plating solution and the process conditions. The chrome-plated layer has good thermal properties. When heated below 500 ℃, its gloss and hardness will not change significantly. When the temperature is greater than 500 ℃, it will start to oxidize and discolor,

When the temperature is higher than 700 ℃, the hardness begins to decrease. The friction coefficient of chromium plating layer is small, especially the dry friction coefficient, which is relatively low among all metals. So the chrome coating has good abrasiveness.

(5) Nickel plating: The appearance of nickel plating is silvery white and yellow. The method of plating nickel on metal or some non-metals by electrolysis or chemical method is called nickel plating. Nickel plating is beautiful, can be used for decoration, high price, slightly complex technology, and the color is silvery white and yellow.

(6) Tin plating: The appearance of zinc plating is silvery white, which refers to the surface treatment technology of zinc plating on the surface of metal, alloy or other materials to play the role of beauty and rust prevention. The cost of zinc plating is low, and the color is silvery white.

(7) Silver plating: silver plating is more effective in preventing corrosion by using the coating, increasing conductivity, reflectivity and beauty.

(8) Galvanized titanium alloy: The price of galvanized titanium alloy is low, mainly because it has good high corrosivity, stability, is not easy to be corroded, and its hardness is relatively high. Compared with ordinary titanium alloy, it will be stronger.