ผลการค้นหา

ค้นเจอ 125 รายการ

gun-metal

ทองแดงผสมกับดีบุกหรือสังกะสี

Bars

(english) A relatively long straight, rigid piece pf metal; long steel products rolled from billets into such shapes as squares,rectangles, rounds,angles,channels,hexagons,and tees. In steel, “merchant bars” include rounds,flats,angles,squares,and channels that are used by fabricators to manufacture a wide variety of products such as furniture,stair railings and farm equipment. Concrete reinforcing bar (rebar) is used to strengthen concrete in highways,bridges and buildings.

Braze Welding

(english) A family of welding procedures where metals are joined by filler metal that has a melting temperature below the solidus of the parent metal, but above 840 (450 C).

metal

โลหะ

Base Metal Contamination

(english) Dirt or other impurities in the steel strip.

Box Annealing

(english) Annealing a metal or alloy in a sealed container under conditions that minimize oxidation. In box annealing a ferrous alloy, the charge is usually heated slowly to a temperature below the transformation range, but sometimes above or within it, and is then cooled slowly; this process is also called close annealing or pot annealing.

Activation

(english) The changing of the passive surface of a metal to a chemically active state. Contrast with passivation.

Break Test (for tempered steel)

(english) A method of testing hardened and tempered high carbon spring steel strip wherein the specimen is held and bent across the grain in a vice-like calibrated testing machine. Pressure is applied until the metal fractures at which point a reading is taken and compared with a standard chart of brake limitations for various thickness ranges.

dandelion metal

(โลหะ) ชื่อโลหะผสมชนิดหนึ่ง ใช้ทำเป็นโลหะธาร เป็นโลหะผสมตะกั่ว 72 เปอร์เซ็นต์ พลวง 18 เปอร์เซ็นต์ และดีบุก 10 เปอร์เซ็นต์

Boil

(english) Agitation of a bath of metal caused by the liberation of a gas beneath its surface. May be deliberately induced by the addition of oxidizing material to a bath containing excess carbon. In the later case it is called a carbon boil and CO or CO2 are liberated.

bell metal

โลหะผสมทองแดงกับดีบุกมรเสียงกังวานแข็งและเปราะ ใช้หล่อระฆัง

Burning 2

(english) Heating a metal beyond the temperature limits allowable for the desired heat treatment, or beyond the point where serious oxidation or other detrimental action begins.

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