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Die Casting News

Combining Toughness, Thermal Resistance in HPDC Die Steel

Posted by Hill and Griffith Company on Jan 7, 2021 10:32:01 AM

New automotive casting objectives highlight the deficiencies in standard tooling materials, but an alternative promises quality, lower cost, longer tool life, and more

Excerpt from the Foundry Management & Technology November 2019 article

The difficulties of casting high-volume automotive parts are well established, and those issues become more critical in production of critically engineered parts, such as the increasing volume of parts produced by high-pressure die casting (HPDC.) Three experts in hot-work production addressed the issues recently in a white paper for Uddeholm AB's newly developed Uddeholm Dievar 25 Joules tool steel for die manufacturing. It gives "the perfect balance between toughness and heat-checking" for HPDC, and other applications, they claim.

Most dies used by foundries, diecasters, and OEMs are formed in AISI H13 or H11, but the Uddeholm experts raise the concern that the die-related problems of HPDC powertrain and transmission castings have not changed in decades, and may be more acute with the advent of production for hybrid and electric vehicle castings.

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Tags: Die Casting, Die Casting Release Agents, High Pressure Die Casting, Die Casting Lubricants, Die Casting Release Agent, Die Casting Lubricant, Die Casting Process, die casting lubricant management, Die Casting Engineer

The Exclusion of Inclusions in High-Pressure Die Casting

Posted by Hill and Griffith Company on Dec 30, 2020 9:07:08 AM

Identifying the Causes and Determining the Solutions

Excerpt from the Die Casting Engineer January 2008 article by Dr. David V. Neff

Defective castings, scrap... Yikes! — The scourge of the high pressure die caster trying to make a good living in a highly competitive marketplace! What's a body to do? Well, for one thing, he can try to avoid making defective castings in the first place! But just what is a "defective" casting? For this article, we wish to consider a defective casting as one which has a defect, right? But there are many ways that a casting can be "defective." For our purposes, we shall limit this discussion to those defective castings where the cause can be attributed to "inclusion" defects — out of the many other defects and their causes that possibly could exist. Inclusions in castings are foreign bodies that exist in the finished casting and are detrimental to the casting's properties and functionality. Where do they come from? If they are present, how do we get rid of them? More importantly, how can we avoid the "inclusion of the inclusion" into the casting in the first place? So, let's start at the beginning.

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Tags: Die Casting, Die Casting Release Agents, Die Casting Lubricants, Die Casting Release Agent, Die Casting Lubricant, Die Casting Process, die casting lubricant management, Die Casting Engineer

Article Review: Better Interaction - Key to Better Die Casting

Posted by Hill and Griffith Company on Jul 24, 2019 8:00:00 AM

The various factors from the plunger tip, plunger gap, shot sleeve, temperature and other factors are important to get right to avoid scrap.

In this article, Paul Robbins, with Castool Tooling System, identifies multiple methods to improving die casting processes of injecting molten alloy to the die cavity.


(Illustration provided by the Hill and Griffith Company)

Factors to consider
The best opportunities for improvement is found in the delivery of the alloy to the die. Both the shot sleeve and the plunger offer opportunities for improvement. Read the entire article here, on the Castool.com site.

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Tags: Die Casting, Metal Casting, Aluminum Die Casting Process, Die Casting Release Agent, Die Casting Defects, Die Casting Engineer

 


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