Heat Treated Steel Bar And Tube
HEAT TREATED STEEL BAR AND TUBE
Heat treated steel bar is produced by heating and cooling in different temperature based on the steel grades to improve the steel bar mechanical properties or machinability for various industrial applications. Heat treated steel bar includes annealed steel bars, Normalized Steel Bar, quenched and temper qt steel bar.
Annealed Steel Bar has better ductility and lower hardness, which can be easier to be machined. The annealing processing is usually widely used for steel grade with higher carbon content above 0.5%. However, some low carbon steel also requires to do annealing for special usage such as 20CrMnTi gear steel. For some special material such as 20CrMnTi gear steel and GCr15 such bearing steel, spheroidizing annealing is often required.
Normalized steel bar sometime is also one kind of annealing processing. It mainly changes the grain to remove the impurities in steel and improves the strength and hardness. For some hot rolled steel bars, to keep the basic mechanical properties, normalizing is often used.
Quenching and Tempering, abbreviated as Q&T is a king of processing that strengthen or harden steel bars by heating the materials and then cooling in water, oil or other liquid medium, that rapidly the change from austenite to perlite to get the proper properties for various usage. The quenched & tempered steel bar materials are usually with carbon from 0.30% - 0.60%, it is widely used as merchant bars in components of various machines.
Our advantages on producing heat treated steel bars:
1) Big stocks of hot rolled round bars or wire rods as raw materials
2) Wide range of Cold Drawn Steel Bar sizes: from 10mm to 150mm
3) Different cold drawing medias powder or oil to get different surface
4) Straightening machines to get better straightness up to 0.5mm/m
5) Grinding and polishing machines to get better roughness upto 0.4um
6) Heat treating furnaces to adjust the mechanical properties
7) Full sets of testing equipment to test the sizes, mechanical properties and microstructure.
8) Multiple packages to avoid broken packages and anti-rusty
4140 steel tube,Round Steel Tubing,Heat Treated Steel Tube,Heat Treated Steel Bar And Tube,S355JR steel tube SHANDONG LE REN SPECIAL STEEL CO., LTD. , https://www.sdcolddrawnsteelbar.com
What is a wireless bridge?
Wireless bridges, as the name suggests, are bridges of wireless networks. They use wireless transmission to bridge the communication between two or more networks. Wireless bridges are divided into circuit bridges and data bridges from the communication mechanism.
Second, the characteristics of wireless bridge
In addition to the basic features of the wired bridge described above, the wireless bridge works in a 2.4G or 5.8G wireless license-free band, making it easier to deploy than other wired network devices. 
Third, the application of wireless bridge
How to use the wireless bridge in the actual installation, and then recommend several kinds of erection options:
1. Peer-to-peer point-to-point (PTP), ie "direct transmission". Wireless bridge devices can be used to connect two fixed networks located in different buildings. They generally consist of a pair of bridges and a pair of antennas. The two antennas must be relatively oriented. The outdoor antenna and the indoor bridge are connected by cables, and the bridge and the network are physically connected.
2, the relay mode is "indirect transmission." BC is not visible between two points, but they can be viewed indirectly through an A building. And two points AC, BA between two points to meet the requirements of bridge equipment communications. Relay mode can be used. Building A acts as a relay point. Each BC placed bridges and directional antennas. Point A can be selected as follows: I place a bridge and an omnidirectional antenna. This method is suitable for situations where the transmission bandwidth is not high and the distance is short. II If point A is a point-to-multipoint wireless The bridge can insert two wireless network cards on the wireless bridge at the center point A. The two wireless network cards respectively connect two antennas through the feeder, and the two antennas respectively point to the B network and the C network; two bridges and two directions are placed on the III network. antenna.
3, point-to-multipoint transmission Because wireless bridges are often due to special requirements when building a network, it is difficult to find power supply nearby. Therefore, it is very important to have PoE (Power over Ethernet) capability, such as support for the 802.3af international standard for Power over Ethernet, which can provide 12V of DC power to the bridge via Category 5 lines. General bridges can be managed through the Web or managed through SNMP. It also has advanced link integrity detection capabilities. When it is used as an AP, it can automatically detect whether the uplink Ethernet connection is working properly. Once it detects an uplink disconnection, it will automatically disconnect the wireless connection. Workstations, thus disconnected workstations can be discovered in time, and search for other available APs, which obviously improves the reliability of the network connection and also provides convenience for locking and troubleshooting problems in time. In short, with the maturation and popularity of wireless networks, the application of wireless bridges will also be greatly popularized.
Wireless bridge working method
These separate network segments are usually located in different buildings, a few hundred meters to several tens of kilometers apart. So it can be widely used in the interconnection between different buildings. At the same time, according to different protocols, wireless bridges can be divided into 802.11b or 802.11G or 802.11GN in the 2.4 GHz band and 802.11a or 802.11an wireless bridge in the 5.8 GHz band.
Wireless bridges have a variety of working methods. Each difference is slightly different, but the principles are the same: bridges, APs, APCs, pass-through clients, relay modes, routing modes, and so on. It is especially suitable for short-distance and long-distance communication in cities. It has two access methods, IP interface access, and IP+E1 dual-interface access.
For more information on wireless bridge product selection and solutions, please contact Feng Runda technical personnel. 
What is a wireless bridge? Features and Applications
What is a wireless bridge? Wireless bridges abandon traditional copper or fiber optics, use wireless communication technology, and use air as a medium for network data transmission to achieve the purpose of connecting different network segments. Let's give us a detailed introduction to wireless bridges below.