Cold drawn steel bar is produced by Hot Rolled Steel Bar or wire rod to get smooth surface, more precision size, higher mechanical properties, which improves machining characteristics. It can also get various sections and sizes. So cold drawn steel bar is a better choice for machining users.
For high carbon steel or alloy steel bars, to avoid the cracks in inner or surface, the bars are usually required to be annealed before cold drawing.
To get different mechanical properties or hardness depending on final usage, the cold drawn bars will also be heat treated such as annealed, normalized or quenched and tempered(Q&T).
For CNC machines usage, to get much more precision sizes or much more better surface roughness for chrome plating, the cold drawn steel bars can also be centerless ground or polished.
We have more advantages on producing cold drawn 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
Cold Drawn Steel Bar,Cold Drawn Steel Rod,Cold Drawn Steel,Cold Drawn Steel Bar Manufacturers,Cold Drawn Steel Properties SHANDONG LE REN SPECIAL STEEL CO., LTD. , https://www.sdcolddrawnsteelbar.com
After ten years of development, China's instrumentation industry has generally reached the international level in the mid to late 1990s, and a few products have reached or reached the current international level. Many products have independent intellectual property rights. The series of industrial automation instrumentation and control systems is relatively complete, which greatly improves the ability of the national key large-scale projects. General products, such as commonly used temperature measuring instruments, pressure measuring instruments, display instruments, traditional flow meters and simple adjustment meters, etc., domestic enterprises can master the core technology, and can upgrade and develop new products on their own. The products can meet domestic needs and have exports. .
In recent years, through independent innovation, a number of high-level scientific research and product achievements have been achieved. Mainly include chromatographic instruments, spectroscopic instruments, electrochemical instruments, research optical microscopes, scanning electron microscopes, electronic balances, centrifuges, electronic universal testing machines, ultrasonic flaw detectors, X-ray flaw detectors, electronic theodolites, and electrical measuring instruments. The technical level of some products approaches or reaches the advanced level of the current international similar products.
Analysis of Ten Year Gross Output Value of Instrument and Meter Industry in China
Polaris Instrument Network News: China's instrumentation industry has achieved rapid development in the past decade. The scale of the industry continues to expand, with rapid growth in production, and the total industrial output value has more than tripled, with an average annual increase of 24.27%. The level of profitability has continued to increase. The total profit in 2010 was nearly 12 times that of 2000, with an average annual growth of 28.12%. The export capacity has been continuously improved and the export delivery value has tripled in the decade, with an average annual increase of 23.11%.