Recently, BMW Brilliance Automotive Co., Ltd. and BMW (China) Automobile Trading Co., Ltd. filed a recall plan with the AQSIQ according to the requirements of the Regulations on the Management of Defective Automobile Product Recall, and decided to recall the following from March 27, 2017. Vehicles, a total of 8604 vehicles:
(1) BMW Brilliance Automotive Co., Ltd. recalled some domestically produced Brilliance BMW 535Li, which was produced during the period from April 13, 2011 to June 30, 2011, totaling 1,179 vehicles;
(2) BMW (China) Automobile Trading Co., Ltd. recalled some of the imported BMW 335i, 535i, 640i, 730Li, 740Li and Z4 produced between December 1, 2010 and April 29, 2011, for a total of 7,425 vehicles.
The recall involved flexible connectors for the rear drive vehicle drive shaft. Due to the manufacturer's manufacturing reasons, the specific batch of connectors is insufficient in strength and may be damaged or broken after long-term use. If the connecting member breaks while the vehicle is running, the vehicle will lose its driving force, increasing the risk of traffic accidents and posing a safety hazard. BMW Brilliance Automotive Co., Ltd. and BMW (China) Automobile Trading Co., Ltd. will conduct free inspections for vehicles within the scope of the recall. If the connecting parts installed on the vehicle are defective batch products, they will be replaced free of charge to eliminate potential safety hazards.
BMW Brilliance Automotive Co., Ltd. and BMW (China) Automobile Trading Co., Ltd. will notify customers by registered mail. Users can call the BMW Service Hotline 400-800-6666 for consultation. If you feel abnormal noise or abnormal vibration during driving, please go to the authorized dealer for inspection. Owners can also visit the AQSIQ Defective Product Management Center website () and the WeChat public account (AQSIQDPAC) for more information. In addition, you can also call the Quality Hotline of the Defective Product Management Center of the AQSIQ or the quality hotline of the local entry-exit inspection and quarantine institution: 12365 (switch No. 2) to reflect the problems in the implementation of the recall activity or to submit defects.
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
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SHANDONG LE REN SPECIAL STEEL CO., LTD. , https://www.sdhighstrengthsteelbolts.com