Q. Solidification patterns of steel, with different composition of carbon, in sand and metal molds by time elapse are represented in the following images. Briefly explain the differences observed between the microstructure that develop from mold walls in each case.

Q. Solidification patterns of steel, with different composition of carbon, in sand and metal molds by time elapse are represented in the following images. Briefly explain the differences observed between the microstructure that develop from mold walls in each case.

Precision Machining Technology (MindTap Course List)

2nd Edition

ISBN:9781285444543

Author:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Publisher:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Chapter2: Measurement, Materials, And Safety

Section2.7: Heat Treatment Of Metals

Problem 2RQ: Direct hardening can be performed on steel containing at least________ carbon.

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Concept explainers

Solidification of metals

The term solidification indicates the conversion of material from the state of liquid to the state of solid. The solid-state is more compact and rigid than liquid, and the solidification indicates the transformation of material from a random state to a more compact and crystalline form. The point at which dendrite formation in liquid starts taking place is referred to as the solidification point.

Question

0.05 0.10% C
0.25 – 0.30% C
0.55 0.60% C
Steel
Steel
Steel
Sand
mold
Chill
Sand
mold
Chill
mold
Sand
mold
Chill
mold
mold
15
2
16
2
Minutes after pouring

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