Comparison Of Shenyang Tianxing Webster's Hardness Tester With Inferior Imitation
Table header
Tianxing:
- The great care of multiple crafting processes, the exquisite inside and outside unification guarantees the extremely high reliability of the instrument.
- High-strength pointer ensures long and incorrect operation without bending distortion.
- High strength and toughness of the table window is hard to damage by external forces.
Imitations:
- The surface of the header are crudely cut corners with poor roughness.
- The pointer can not run smoothly because of the flaw of technical, which reduces the reliability of the measurement result.
- The untreated table window is easily damaged during operation.
- The fault and clamping stagnationof the pointer hysteresis is common, which causes the problems that readings is inaccurate or the pointer cannot returned to zero level.
Lower Handle
Tianxing:
It is still bright and smooth even be magnified.
Imitations:
No further treatments have been given after rough machining that trachoma and oxidative traces can be seen everywhere.
Frame
Tianxing:
- The treatments of anvil block and sealant are smooth both of texture of inside and outside that without processed.
Imitations:
- Poor sealing technology lays hidden dangers for the future use.
- Rough process textures and oxidation traces can be seen everywhere.
- The inner machining texture affects the smooth operation of the instrument, leading that the reliability of the measurement result cannot be guaranteed.
Sleeve
Tianxing:
- The sleeve that finish through multiple process of fine machining ensures the smooth operation of the instrument and the reliability of measurement results.
Imitations:
- Texture is clearly visible and also easy to peeling and chipped paint by rough machining process.
- There are no security or reliability guarantees for the final measurement because of the operation irregularity caused by the internal clearance of the instrument that generated by the machining texture.
Hardness Blocks
Tianxing:
- Use the standard Rockwell hardness Tester and HRE standard hardness block, making value transfer strictly in accordance with the Regulations of metrological verification.
- The hardness of webster hardness block is uniform and stable by special heat treatment process.
Imitations:
- Only ordinary aluminum plate is measured by webster hardness tester, which accuracy of the hardness cannot be guaranteed.
The Maintenance And Repair Of Webster Tester
Portable Webster hardness tester is precise and its service life depends on whether it is maintained right and timely as well as appropriately. During it is being in use, there are the following points that have to be paid attention to:
1.To avoid being stained. When using this portable hardness tester, we should often wipe it with soft cloth in case that the dirt goes into it from the gap of dial or from the places around the pressing needle. If not, the dirt which has been in the instrument will affect the measuring accuracy badly or lead to its breakdown.
2.To avoid being rusted. Although all the parts of the instrument have been given anti—rust treatment, it may still cause some parts to be rusted if there is poor maintenance. Especially, to focus on not being watered, because many of them will rust when they meet water. Gauge outfit could be rusted buildup and then results in rejection of the instrument if the inside of gauge outfit has water.
3.To avoid dropping. This portable hardness tester consists of many precise parts. If it drops, it will turn some parts into the permanent damages.
4.Do not disassembly. The promise of the measuring accuracy from this instrument relies on some precise components that are cooperating well. Therefore, except the detachable ones that are in correction, they can be taken apart any more. Otherwise, it will bring some troubles to you and the instrument will be disqualified of warranty.
5.To make corrections. When using the detecting instrument, we should pay attention to its accuracy frequently , and to check whether the full scale（20HW） of instrument and calibration point is right or not. Once the inaccuracy found, we should correct it in time. Besides, to decrease the times of striking in case of the abrasion of pressing needles.
6.The illustrations of consumptive material. Pressing needles belong to consumptive material, which is no within the warranty. Its service life depends on whether the using method is right and the maintenance and repair is timely as well as appropriately or not.
① The service life of pressing needles has direct relations with using frequency of customer’s instrument and harness range of measuring workpiece. The more frequently the customer use and higher harness of measuring workpiece, the greater abrasion the pressing needles will be, causing its service life to be shorter.
② Keeping the sample from twisting when you are measuring, or it will cause the error and even damage the pressing needles. To strictly prohibit using harness clamp to pull the material out from material basket directly; otherwise, it will ruin the pressing needles immediately.
③ When measuring the material, it is no necessary to use specially great power to clench the hardness clamp. Do not rush to increase the strength to make sure that will not damage the instrument and its accessories.
7.Transportation. During the long—distance transport, please to try to use package reserved for Webster hardness tester, which helps to minimize the damages and incorrectness of instrument made by external force.
Portable Brinell Hardness Tester Measuring Hardness of Metal Workpiece
Hardness is a professional terminology of physics, which refers to the ability of the local material to resist the comprehensive properties that push onto its surface. There are many kinds of hardness testing approaches, such as: Brinell, Rockwell, Vickers and so on.
Brinell Hardness test method is that to push a certain diameter of hardened steel ball or cemented carbide ball with certain size test load onto the tested metal surface, holding pressure for a period of time, then remove the load to get the indentation. The diameter of indentation is read by reading microscope, and then Brinell hardness number is obtained by looking up the Brinell hardness number table. The steel ball head with a diameter of 10mm, the load force of 3000KGF, and the retention time of 15s is the most common test standard in industrial production.
The standard measurement of the PHB-3000-type hydraulic Brinell hardness tester produced by Shenyang Tianxing Instrument Company uses 3000kg Force and 10mm Ball (this portable hardness tester instrument is also equipped with 5mm cemented carbide balls to meet the needs of special measurement ). In order to ensure the measurement requirements of afterburner 15s that Brinell hardness demands, in the actual measurement PHB-3000 repeats afterburner 3 to 5 times to be equivalent to the requirement of maintaining 15s of the test force in the Brinell hardness test method, this instrument conforms to the American standard ASTM E11 "portable hardness tester to measure the hardness of metallic materials."
Brinell hardness meter is measured with the 10mm steel balls and 3000kg load force, and the surface area of spherical indentation is larger, which makes the test results have a better overall representation, will not be impacted by the measured individual organizations of artifacts, the measured value has a high accuracy, and the errors are smaller.
The original Brinell hardness tester for the large laboratory equipment can not detect the field workpiece, the PHB-3000 hydraulic Brinell hardness Tester produced by Shenyang Tianxing is a portable hardness tester, with the weight of less than 14kg, which is simple to operate and easy to carry to the workshop for measuring large, assembled, difficult to move and non-slicing workpiece. The instrument is tested according to the real Brinell hardness test principle, the same as the principle of desktop in the lab. The calibration accuracy of test force is 0.5% of the load and the hardness test accuracy is the same as the desktop. What’s more, the instrument PHB-3000 can use a variety of test forces and select various ball indenters, which wider its test scope a lot. The range of measurement can reach 16~650HBW, which can meet most of common metal measurements of Brinell hardness requirements quite well.
The Maintenance and Repair Of Webster Hardness Tester
Portable Webster hardness tester is precise and its service life depends on whether it is maintained right and timely as well as appropriately. During it is being in use, there are the following points that have to be paid attention to:
1.To avoid being stained. When using this portable hardness tester, we should often wipe it with soft cloth in case that the dirt goes into it from the gap of dial or from the places around the pressing needle. If not, the dirt which has been in the instrument will affect the measuring accuracy badly or lead to its breakdown.
2.To avoid being rusted. Although all the parts of the instrument have been given anti—rust treatment, it may still cause some parts to be rusted if there is poor maintenance. Especially, to focus on not being watered, because many of them will rust when they meet water. Gauge outfit could be rusted buildup and then results in rejection of the instrument if the inside of gauge outfit has water.
3.To avoid dropping. This portable hardness tester consists of many precise parts. If it drops, it will turn some parts into the permanent damages.
4.Do not disassembly. The promise of the measuring accuracy from this instrument relies on some precise components that are cooperating well. Therefore, except the detachable ones that are in correction, they can be taken apart any more. Otherwise, it will bring some troubles to you and the instrument will be disqualified of warranty.
5.To make corrections. When using the detecting instrument, we should pay attention to its accuracy frequently , and to check whether the full scale（20HW） of instrument and calibration point is right or not. Once the inaccuracy found, we should correct it in time. Besides, to decrease the times of striking in case of the abrasion of pressing needles.
6.The illustrations of consumptive material. Pressing needles belong to consumptive material, which is no within the warranty. Its service life depends on whether the using method is right and the maintenance and repair is timely as well as appropriately or not.
① The service life of pressing needles has direct relations with using frequency of customer’s instrument and harness range of measuring workpiece. The more frequently the customer use and higher harness of measuring workpiece, the greater abrasion the pressing needles will be, causing its service life to be shorter.
② Keeping the sample from twisting when you are measuring, or it will cause the error and even damage the pressing needles. To strictly prohibit using harness clamp to pull the material out from material basket directly; otherwise, it will ruin the pressing needles immediately.
③ When measuring the material, it is no necessary to use specially great power to clench the hardness clamp. Do not rush to increase the strength to make sure that will not damage the instrument and its accessories.
7. Transportation. During the long—distance transport, please to try to use package reserved for Webster hardness tester, which helps to minimize the damages and incorrectness of instrument made by external force.
To know more about After-sale Service Instruction Manual, please go to: http://www.txinstruments.com/support/after-sale-service.html
The anodic oxidization of aluminum alloy
1.Definition of anodic oxidization
Anodic oxidization is a kind of electrolytic oxidation. In this process the surface of aluminum alloy generally transfers into a oxidation film, which has protection, decoration and some other functions.
2.Classifications of anode oxide film
There are two types of oxidation films: barrier oxide film and porous oxide film. Barrier oxide film is a compact nonporous and thin oxide film immediately before metal surface. Its thickness depends on applied voltage is no more than 0.1um. Porous oxide film consists of two oxidation films: barrier layer and porous layer. The thickness of barrier layer is related to applied voltage while the thickness of porous layer is determined by the power passed. We use porous layer most commonly.
3.Features of anode oxide film
a.The structure of oxide film assumes porous honeycomb. It has good adsorption capacity with the porosity. It can be used as under-coating of piating coacing or be stained to increase the decorative effect.
b.The structure of oxide film has high hardness. Anode oxide film has high hardness with the hardness about 196－490HV. Its has excellent wear resistance because of the high hardness.
c.The corrosion resistance of oxide film. Aluminum oxidized film is stable in the air and soil, having good binding ability with parent material. Generally, stain sealing or spray process is used to further improve its corrosion resistance after oxidation.
d.The binding force of oxide film. Oxide film has good binding ability with parent material and it is hard to separate them with mechanical methods. Even if layer bends with the metal, it can still keep a favorable combination of parent material. But it would crack when layer is to be subjected to considerable shock loads and bend and deform because of its small plasticity and heavy brittleness. As a result, this kind of oxide film is not easy to be used in mechanical action but for under-coating of the paint coating.
e. The insulation property of oxide film and the impedance of anodic oxide film of aluminum are somehow high while the thermal conductivity is rather low. And the heat endurance can reach 1500 degree and the thermal conductivity is 0.419W/(m•K)—1.26 W/(m•K). It can be used as insulating layer of dielectric or electrical products of electrolytic capacitor.
W-20 Webster hardness tester can be used to test the hardness value of aluminum alloy, pipe, plate, aluminum parts, and other soft metals. Judge whether the aluminum products have the aging or not, and determine the limitation is up to standard. It also can distinguish between different types of aluminum and different aging state. Webster hardness testers especially suitable for batch production site and sales site, also for the aluminum profile, door, window, curtain, wall and so on to do the quick testing and non-destructive checking one by one.
The techniques of encyclopedia of Aluminum Alloy Surface Treatment (2)
The chemical polishing and chemical transformation of Aluminum ( electric )
1.The effect of chemical polishing or electro-polishing
Chemical polishing is an advanced finishing treatment. It can remove not only the slight mold marks and scrapes on the surface of aluminum products, but the rubbing striation, the layer of thermal deformation, oxide film, etc. may form in mechanical polishing, which increases the decorative effect of aluminum product by smoothing the rough surface into a bright one.
2.The principle of chemical polishing
Chemical polishing makes aluminum product’s micro projection preferentially solubilize before its depression by controlling the selective dissolution of aluminum product’s surface, with the purposes of brightening and smoothing the surface. The principle of electrochemical polishing is point discharge,which is similar to other kind of chemical polishing.
3.The effect of chemical transformation
Chemical transformation is mainly used for protecting aluminum and its alloys from corroding. It can be used as coating directly or under-coating of organic polymer, which can not only solve the problem of the adhesion between coating and aluminum but also improve the corrosion resistance of organic polymer coatings.
4.The principle of chemical transformation
In the solution for chemical treatment, the surface of aluminum and chemical oxidant will react to form chemical conversion coating . In this process, common chemical transformations can be divided into chemical oxidation, chromate treatment, chromate-phosphate process and chrom-free conversion.
5.The introduction of chemical transformation
The approach of chemical oxidation treatment is that aluminum can obtain a dense protective chemical oxidizing film in boil water. But as film forming rate and performance lack productivity. The chromium film of chromate treatment is the highest in corrosion resistance at present, which can be used in sprayed under-coating as well directly used as the final coating of aluminum alloy, with the disadvantage of causing serious environment pollution. Chromate-phosphate process can meet the requirement of sprayed under-coating and trivalent chromium is nontoxic, which mainly used in 3C products at the moment. Chrom-free conversion industrialization production mainly adopts chromium - free treatment of titanium-containing or (and) fluoride complexes of zirconium, which requires a degree of chemical pretreatment. Meanwhile, the actual results of chemical transformation cannot be judged by naked eyes as without chromium treatment film is colorless transparent. So reliable performance and strict controlled processing are more counted on. Above all, chemical transformation is most frequently used for chromate-phosphate process of 3C products.
Webster Hardness Testers are applied to the quick test for the hardness of aluminum alloy profiles, pipes, plates, aluminum parts and other soft metal. It can be used to estimate whether the aluminum profile has aging or whether the aging is qualified, distinguish different aluminum grades and different aging condition. The tester is the first choice instrument for testing the mechanical property of aluminum alloy profiles. Tianxing Instruments produce these four types of webster hardness tester, welcome to order:
W-20 Webster Hardness Tester
W-B75 Webster Hardness Tester
W-B92 Webster Hardness Tester
W-BB75 Webster Hardness Tester
