exogenous inclusion

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Also, salt carryover from certain recycling operations and "bath" carryover from low-grade primary ingot can represent an exogenous inclusion type that is imported into the system.

Understanding inclusions in aluminum castings

KMF) described his foundry's work with filters to reduce scrap caused by exogenous inclusion defects.

Steel foundries examine quality & waste control

Answers to these questions can often distinguish between gas, exogenous inclusion and shrinkage defects, though they are not normally helpful in pinpointing microstructural problems.

Visual examination may be sufficient to separate exogenous inclusion defects from gas holes or shrinkage cavities.

The greater the amount of these elements in the alloy, or the greater the alloy addition level, the greater the chance of having exogenous inclusion problems.

A systematic approach to cast iron defect analysis

Sources for exogenous inclusions include refractory particles, usually from degradation of furnace walls, transfer ladles, launders, riser tubes, filling funnels, and in some instances from pieces of the sand mold.

I have inclusions! Determining the best cost saving approach: this is the first of a two-part series providing a guideline to better understand the interrelated aspects between oxides, inclusions, dross, fluxes and molten metal quality

These filters eliminate exogenous inclusions by trapping slag and dross.

Waupaca breaks out of the mold with new gating approach

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