Automotive Heat Treating

Practical Approach to Determining Effective Case Depth of Gas Carburizing

BOTW-50w  Source:  Gear Technology

“Effective case depth is an important factor and goal in gas carburizing, involving complicated procedures in the furnace and requiring precise control of many thermal parameters. Based upon diffusion theory and years of carburizing experience, this paper calculates the effective case depth governed by carburizing temperature, time, carbon content of steel, and carbon potential of atmosphere. In light of this analysis, carburizing factors at various temperatures and carbon potentials for steels with different carbon content were calculated to determine the necessary carburizing cycle time. This methodology provides simple (without computer simulation) and practical guidance of optimized gas carburizing and has been applied to plant production. It shows that measured, effective case depth of gear parts covering most of the industrial application range (0.020 inch to over 0.250 inch) was in good agreement with the calculation.”

Read More:  Practical Approach to Determining Effective Case Depth of Gas Carburizing by March Li

March Li Metallurgist, Automotive Heat Treating, Practical Approach to Determining Effective Case Depth of Gas CarburizingAuthor March Li -Metallurgist

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Dana to Purchase Strategic Driveline Production Assets of SIFCO S.A.

Dana Incorporated announced a definitive agreement to purchase strategic assets of SIFCO S.A., a leading producer of forged and machined components located in Brazil.

Under the terms of the proposed purchase, Dana would acquire manufacturing and other assets of SIFCO. This acquisition will enable Dana to enhance its vertically integrated supply chain, which will further improve the company’s cost structure and customer satisfaction by leveraging SIFCO’s extensive experience and knowledge of sophisticated forged components.

“For nearly 70 years, Dana has operated in Brazil, which has long been one of the top ten economies in the world,” said James Kamsickas, president and chief executive officer of Dana. “This is an opportune time to invest in strategic and selective assets in Brazil that will further strengthen our position as one of the most trusted, top-tier suppliers to the mobility industry – thus positioning us for future profitable growth throughout the region.”

By expanding manufacturing capabilities in Brazil, the acquisition will also enable Dana to help vehicle manufacturers better accommodate local content requirements, which reduce import and other region-specific costs. It will also further strengthen Dana’s position as a central source for products that use forged and machined components throughout the region.

“Dana has worked with SIFCO for 40 years as a supplier of key components used in vehicle drivelines,” said Mark Wallace, president of Dana Commercial Vehicle Driveline Technologies. “This acquisition will add the talent and capabilities needed to help us meet the requirements of our commercial-vehicle customers and provide value for our light-vehicle and off-highway customers, as well.”

SIFCO has operated under judicial restructuring since 2014, and the transaction is subject to closing conditions, including bankruptcy court and regulatory approvals.  Final financial terms of the agreement are subject to the outcome of closing conditions. The transaction is expected to be completed by the end of 2016.

Dana designs, manufactures, and distributes products in Brazil for virtually every major global producer of passenger vehicles, commercial trucks, and off-highway equipment.

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Vacuum Assisted High Pressure Die Casting Technology Used in Manufacturing

BOTW-50w  Source: La Metallurgia Italiana –

Primary aluminum-silicon-magnesium alloys are by far the most widely used type in the manufacturing of safety parts for the automotive industry, such as suspension components and wheels, due to their excellent castability and good mechanical properties which can be further improved by heat treatment: solution, followed by water quenching and artificial aging T6 or T7. The recent structural castings, being extremely thin walled (of the order of 2.5 mm) and of rather great dimensions usually require the
use of High Pressure Die Casting. These parts must be defect free and heat treatable to attain the requested properties, ductility and weldability being the most difficult to achieve. Vacuum must be applied as well as a combination of precautions relative to the die design, die lubrication, melt quality and shot profile have to be taken.

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Cost Effective Heat Treatment for Automotive Components made of Aluminium

BOTW-50w  Source:  Heat Processing Online   

Automotive Heat Treating, Helmut Egger, Aluminium

The heat treatment of automotive components, made of aluminium alloys, has become a main focus point over the past years within the automotive industry. Increased strength and overall improved properties are ever more frequently targeted, so that material- and weight saving requirements can be accomplished. A fully automated – high capacity T6 – heat treatment line, which is in full compliance with today’s requirements of the automotive industry, will be introduced in the following.
Helmut Egger

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Aleris To Be Acquired By Zhongwang USA LLC

Aleris Corporation, a global aluminum rolled products producer, announced today that it has entered into a definitive agreement to be acquired by Zhongwang USA LLC, a company majority-owned and led by Mr. Liu Zhongtian, founder of China Zhongwang Holdings Limited (“China Zhongwang”, HKEX code: 01333).  The aggregate value of Aleris amounts to $2.33 billion, comprising $1.11 billion in cash for the equity to be paid by Zhongwang USA, plus $1.22 billion in net debt.

Aleris will continue to be headquartered in Cleveland, Ohio, and will be operated as an independent entity. The Aleris management team will remain in place, providing continuity for Aleris employees and customers and supporting the continued implementation of the Aleris strategy.

Aleris will retain its name and continue to serve its customers with no changes to current operations, contracts or commitments.  It will continue with the implementation of all strategic growth projects, including its major expansion project in Lewisport, Kentucky, which will enable Aleris to meet the North American automotive industry’s growing demand for aluminum auto body sheet.

“We are excited about this transition to strategic ownership as it will allow us to accelerate our strategy to expand our capabilities to support the production of high-value advanced materials for the global automotive and aerospace markets, while maintaining our position as a leading supplier to critical regional markets like building and construction,” said Sean Stack, President and CEO of Aleris.  “We expect the transition to be seamless for our employees and customers, and that the new strategic shareholder will provide us with greater financial flexibility to continue to anticipate and meet the needs of our customers well into the future.”

The acquisition of Aleris reflects Mr. Liu’s commitment to disciplined operating investments over the long-term in an industry to which he has been committed for two decades.  In addition to his role at Zhongwang USA, Mr. Liu is also the chairman and founder of China Zhongwang, the second largest aluminum extrusions product developer and manufacturer in the world and the largest in Asia.  With the acquisition of Aleris, Mr. Liu will now oversee companies that have complementary geographic footprints and capabilities.

“This acquisition is an international expansion to establish a complementary business foothold, as I strongly believe in the potential and prospects of Aleris and the aluminum industry as a whole,” Mr. Liu said.  “Aleris has a strong management team, talented employees and industry-leading capabilities with a complementary geographic footprint.  As the company enters the final phase of its Lewisport automotive project, I believe Aleris is well-positioned to capitalize on the positive demand trends we see globally, and I look forward to supporting the Aleris management team in implementing their growth strategies and pursuing continued success with expanded resources and financial and operational flexibility.”

Since 2010, Aleris has been owned and controlled by a group led by certain investment funds of Oaktree Capital Management, L.P., with affiliates of Apollo Management, L.P., and Sankaty Advisors, LLC owning minority interests.

The transaction is expected to close in the first quarter of 2017 following the customary regulatory approvals and closing conditions.

Credit Suisse acted as financial advisor to Aleris.  Fried, Frank, Harris, Shriver and Jacobson, LLP acted as legal advisors.  Moelis & Co. advised the Aleris Board on certain aspects of this transaction. Paul, Weiss, Wharton & Garrison LLP acted as legal advisors to Oaktree Capital Management.

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Distortion Engineering of Gears

BOTW-50w  Source:  Gearsolutions.com

THE CAUSES FOR DISTORTION OF GEARS are complex and the heat treatment process has been named as a main contributing factor. However, the truth is, all the manufacturing steps prior to and after heat treating also make a contribution to distortion. Nevertheless, any thermal operations carried out on gears may trigger and reveal the hidden distortion potential induced by manufacturing. An interesting approach of “distortion engineering” was established by the Collaborative Research Center (CRC) at Bremen University.

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