PIN needle material and surface treatment method:
PIN pins are widely used, and various electronic components, connectors, transformer inductors, electronic switches, modular power supplies, automotive new energy, aerospace accessories, medical equipment and other products will be guided by PIN pins. So there are a lot of metal materials, how to choose the material? What about the surface treatment?
1. PIN pin pin jack hole material:
Most PIN pins are machined from elastic copper rods with good electrical conductivity. The surface is gold-plated and silver-plated to achieve low contact resistance and anti-corrosion.
Copper rod is a kind of non-ferrous metal processing rod with good processing properties. It is mainly divided into brass rod (copper-zinc alloy, relatively cheap), copper rod (higher copper content), aluminum bronze rod, tin bronze rod, silicon bronze rod, beryllium bronze rod, brass bronze rod, white copper bronze rod, copper rod, tungsten copper rod and oxygen-free copper rod.
The general specification is 1.0-200 meters, and the length is 2500-6000 meters.
Common materials for PIN pins are as follows:
H59 is cheap. High strength, high hardness, good plasticity, can still work under pressure at high temperatures, and has average corrosion resistance.
The average copper content of H62 brass is 62%, which has good mechanical properties, good hot plasticity and good cold plasticity. It has good machinability and is easy to weld, but it is also prone to corrosion and cracking. Compared to this, it is harder in greenhouses, so it can be used for parts that are subjected to heavy loads.
C5440 phosphor bronze contains lead, which has good machinability and cold workability. C54400 Phosphor Bronze shall not be used as a bearing, bushing, gear, shaft or other part. Features: good machinability, no burrs, good cold workability.
QSN4-3 is used in the manufacture of springs and other elastic elements. The Chinese name is tin bronze. Features: High abrasion resistance and elasticity, good magnetic resistance. It can be well processed by hot or cold pressing. In the hard state, it has good machinability and easy weldability. It has good corrosion resistance in the atmosphere, fresh water and seawater.
2. PIN needle surface treatment method:
Terminal block Taiwan is an important part of the electronic components industry, it is not difficult for electronic engineers to find that most terminal blocks Taiwan are coated, so what is its meaning and existence? The coating not only protects the terminal station, reduces environmental corrosion, and improves the durability and wear resistance of the terminal station, but also helps to establish and maintain a stable impedance in terms of electrical performance of the terminal station.
1. There is oil stain or foreign matter in the plating, which cannot be removed after electroplating pretreatment, resulting in no electroplating;
2. The substrate is slightly easy to peel off. After electroplating, under the action of external force, the covered double skin falls off, exposing the substrate;
3. After electroplating, the plating layer and substrate fall off under the action of large external force;
4. After electroplating, more particles will be produced on the surface, and when the particles are removed by external force, the appearance of the substrate or primer coating will be exposed;
The humidity of the PIN needle is too high, resulting in corrosion points:
1. The coating and the substrate, including the coating and the substrate, should have a good adhesion;
2. The coating on the main surface of the part should have a relatively uniform thickness and detailed structure;
