At present, the users of the domestic metallurgy, foundry, and machinery industries have the following types of instruments that can be used to analyze trace elements other than carbon and sulfur in metallic materials:
1. Spectrum Analyzer. The advantage is that multiple elements can be analyzed at a time with high accuracy. The disadvantage is that the price is too high, a set of hundreds of thousands to millions, so currently only a few large companies use.
2. Spectrophotometer. The advantage is that the detection wavelength is easy to choose and the price is not high. The disadvantage is that the test result can not be directly displayed (to be converted); there is no curve to establish the call function, the detection of different elements each time to re-calibration; the cuvette into and out of the liquid inconvenient; the basic knowledge of the operator's chemical analysis requirements Therefore, it cannot meet the needs of on-site on-line inspection and analysis.
3. Colorimetric analyzer. The advantage is that it is easy to use, the price is not high, and the operator's chemical analysis basis is not very demanding. Therefore, it is widely used in the production inspection field analysis. However, because of its historical reasons, there are the following congenital defects.
The metal element analyzer was developed in China in the 1960s to meet the needs of online on-site detection and analysis of five major elements (carbon, sulfur, silicon, manganese, and phosphorus) of iron and steel metallurgy. The elemental analyzer was developed for silicon, manganese, and phosphorus (at the time, it was called three elements, and the three channels were fixed at predetermined wavelengths to detect silicon, manganese, and phosphorus, respectively). Since silicon, manganese, and phosphorus do not require much wavelength detection, accuracy is not high. Therefore, the three-element analyzer satisfies the need for online on-line analysis of elemental content in the iron and steel metallurgy industry. But now, all industries need to detect materials besides steel, copper alloys, aluminum alloys, and zinc alloys. The elements examined will also evolve from silicon, manganese, and phosphorus to copper, chromium, nickel, zinc, magnesium, tungsten, vanadium, and niobium. , titanium, molybdenum, aluminum, arsenic, zirconium, boron, rare earth elements and other elements. The following defects commonly found in traditional metal element analyzers are increasingly manifested:
1. The measurement wavelength is preset and can not be adjusted continuously. Although some models can be replaced (by replacing filters or light emitting diodes), it is still cumbersome for the user, and the types of elements that exceed the number of channels of the instrument are encountered. Or it is particularly inconvenient to test different alloy materials. Moreover, not all wavelength filters and LEDs can be purchased, making it difficult to measure certain elements. For example, the measurement of magnesium requires a 576-nm light source, and filters and LEDs with such wavelengths are not available.
2. The measurement light source is mostly a DC bulb plus a filter or a cold light emitting diode, and its wavelength accuracy is poor. The wavelength accuracy of the DC bulb plus filter method depends on the filter, and most of the filter elements used in the elemental analyzer can only achieve ±15 nm. The wavelength accuracy of light emitting diodes depends on the diodes used. Most of the errors range from 20 to 30 nm, which does not guarantee the accuracy of analysis and detection.
The application of new materials and new technologies requires the types of elemental analysis in various industries to be more demanding. In the face of the inherent defects and market pressures of traditional metal element analyzers, many manufacturers have adopted the following countermeasures:
1. Increase the number of instrument analysis channels, that is, increase the number of preset fixed wavelengths, thereby increasing the number of elements that can be detected;
2. Predetermined different fixed wavelengths for predetermined different uses, so as to form different types of elemental analyzers that detect different materials and different elements respectively.
However, all of the above methods are palliatives. First, not all wavelengths needed can be realized. Second, the problem of low wavelength accuracy is still not resolved. Therefore, the inherent defects of traditional elemental analyzers cannot be fundamentally solved.
Hanger Bolt
Hanger Bolts have threaded areas at both ends, a lag screw thread at one end and machine screw thread on the other. They are designed for insertion into a pre-drilled hole and are ideal for overhead application, usually in a wall or ceiling. Plain finish, or bare metal, may or may not have a coating of light oil to resist corrosion. Plain finish, or bare metal, may or may not have a coating of light oil to resist corrosion.
Available Material:
1.StainlessSteel:SS201,SS303,SS304,SS316,SS410,SS420
2.Steel:C45(K1045), C46(K1046),C20
3.Carbon Steel: 1010,1035,1045
4.Aluminum or Aluminum Alloy:Al6061,Al6063,Al7075etc
5.Brass:H59,H62,Copper,Bronze
Surface Treatment:Plain, Zinc-plated, Yellow Zinc-plated, Black Zinc-plated, Brass-plated, Cadmium, Geomet, Dacromet, HDG, Nylok, Black-Oxide, Nickel-Plating, Phosphatizing, Powder Coating and Electrophoresis.
Standard:ISO, DIN, ANSI, JIS, BS and Non-standard.
Certificate:GB/T19001-2008/ISO9001:2008
It can match ROHS,SGS and environment protection
Manufacture Process:Raw Material/QC/Heading/Threading/Heat Treatment/Surface Treatment/QC Inspection/Sorting and Packing/Shipping
Sample Service:Samples for standard stainless steel fasteners are all in free.
Lead Time:25-45 days after order confirmed
Packing:25Kg/Carton,bulking,36Carton/Pallet
Carton Size:18*26*28cm or customized
Warranty:We confirm we provide the products will satisfied your request 100%
After-salesService:We will follow up every customer and solve all your problems satisfied after sales
Hanger Bolt,Headless Screws,Metric Steel Hanger Bolt,Double Thread Hanger Bolt
Ningbo Brightfast Machinery Industry Trade Co.,Ltd , https://www.brightfastener.com