The current economic trend has shifted from the regional economic model in the past to the economical trade. No matter whether it is a regional market or entering the market, high-quality performance cannot be denied. The vibration test is an indispensable tool to help your product jump into the ranks of high quality. When the product reaches the user's hands, there will be different states of vibration in the process, resulting in varying degrees of damage to the product. Any damage to the product is not what the manufacturer and the customer are willing to see. However, the vibration during the transportation process is unavoidable. If blindly increasing the packaging cost, it will bring serious and unnecessary waste, and vice versa. Packaging has caused high product costs and lost product image and market. These are not what we would like to see. The vibration test began to sprout about four or fifty years ago. When the theory was established, it did not help people believe it was important. Until World War II, many aircraft, ships, vehicles and equipment were found accidentally. The proportion of zero missing components is quite high. As a result of the research, it has been found that most of the components are unable to withstand the long-term resonance generated by their own structure, or that the loaded items are subjected to resonance, and the components are loosened and cracked. Loss of zero caused even a huge loss. When this result was announced, the vibration test received attention from all walks of life. They invested large sums of money and manpower to study it.

Later, after the establishment of modern theory of vibration measurement analysis and simulation analysis, the method and logic of vibration testing have been continuously improved. In particular, the frequent circulation of goods today makes vibration testing more important. However, the purpose of the vibration test is to perform a series of controllable vibration simulations in the experiment, to test whether the product can withstand the test of transportation or vibration environment factors during the life cycle, and to determine the required standards for product design and function. According to statistical data, the 3% increase in design level will increase 20% recovery and reduce 18% of all unnecessary expenditures. Vibration simulation is based on different purposes and there are different methods such as resonance search, resonance dwell, cyclic scan, random vibration and stress screening, etc., while the vibration effect meter has: First, the strength of the structure. Second, the combination of loose. Third, the protection material wear. Fourth, the damage of the components. Fifth, poor contact of electronic components. Sixth, circuit short circuit and intermittent instability. Seventh, the standard deviation of each piece. 8. Screen out bad parts early. Nine, to find the resonance relationship between parts, structure, packaging and delivery process, to improve the resonance factor. The vibration test procedure shall evaluate the specifications of the specified test, the authenticity of the fixture design, the functional check during the test and the evaluation, review and recommendations of the post-test specimen. The essence of the vibration test is to confirm the reliability of the product and to screen out defective products in advance before leaving the factory, and to evaluate the failure analysis of defective products in order to become a high-level, high-confidence product.
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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