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ค้นเจอ 149 รายการ

Bainite

(english) A eutectoid transformation product of ferrite and a fine dispersion of carbide, generally formed at temperatures below 840 to 930 F (450 to 500 C): upper bainite is an aggregate containing parallel lath-shape units of ferrite, produces the so-called feathery appearance in optical microscopy, and is formed at temperatures above about 660 F (350 C); lower bainite consists of individual plate-shape units and is formed at temperatures below about 660 F (350 C). Also, a slender, needle-like (acicular) microstructure appearing in spring steel strip characterized by toughness and greater ductility than tempered Martensite. Bainite is a decomposition product of Austenite best developed at interrupted holding temperatures below those forming fine pearlite and above those giving Martensite.

Moment of inertia (I):

(english) Moment of inertia has two distinct but related meanings: 1) it is a property of a an object relating to the magnitude of the moment required to rotate the object and overcome its inertia. 2) A property of a two dimensional cross section shape with respect to an axis, usually an axis through the centroid of the shape.

weir, cipolleti

ฝายสี่เหลี่ยมคางหมู : ดู [[weir]], [[trapezoidal]]

Centroid:

(english) Similar to the concept of center of gravity, except that it applies to a two dimensional shape rather than an object. For a given shape, the centroid location corresponds to the center of gravity for a thin flat plate of that shape, made from a homogeneous material.

garnet paper

กระดาษเคลือบผงหินโกเมน ใช้เช่นเดียวกับกระดาษทราย

emery-paper

กระดาษทราย

low to paper

(การพิมพ์) รอยพิมพ์ไม่ชัด คือตัวพิมพ์ที่ใช้จนสึกมาก หรือตัวพิมพ์ ที่พื้นหน้าบางมากกว่าตัวพิมพ์ใหม่

filter paper

(กระดาษ) กระดาษกรอง

trapezoidal rule

กฎสี่เหลี่ยมคางหมู (ใช้หาพื้นที่รูปหลายเหลี่ยม)

Baller Stick

(english) Octagon-shaped wooden stick approximately 5' long. This stick is used in the baller area, to change burr mashers, to start a coil with a large ID, etc.

Batch Anneal

(english) The process by which a large, stationary stack of steel coils (4 coils high) is subjected to a long heat-treating cycle. This process enables the cold-rolled sheet to fully recrystallize into the softest possible product conforming to customer specifications. Controlling the recrystallization process makes a fine-grained microstructure easy to obtain, and minimizes the tendencies for retention of directional properties of the rolled steel which could produce undesirable shapes in the stamping of a cylindrical part such as a can. Also see Anneal and Continuous Anneal.

Elastic energy:

(english) The energy stored in deformed elastic material (e.g., a watch spring). Elastic energy equals where k is the stiffness, and is the associated deflection. Elastic energy is sometimes called elastic potential energy because it can be recovered when the object returns to its original shape; see potential energy.

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