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คลิกที่แต่ละคำเพื่อดูรายละเอียด
สีเทาแกมฟ้า, สีฟ้าอ่อน
(english) A pen or ink line drawing reproduced (printed) on sensitized paper by direct exposure.
(english) Brittleness exhibited by some steels after being heated to some temperature within the range of 300 (degrees) to 650 (degrees) F, and more especially if the steel is worked at the elevated temperature. Killed steels are virtually free of this kind of brittleness.
(ไม้) รอยหรือจุดขึ้นราบนท่อนไม้
สีน้ำเงินแก่
(english) Heating hot rolled ferrous sheet in an open furnace to a temperature within the transformation range and then cooling in air, in order to soften the metal. The formation of a bluish oxide on the surface is incidental.
สีน้ำมันสีฟ้าหรือสีน้ำเงิน, ทาสีฟ้า
(english) Reduced ductility occurring as a result of strain aging, when certain ferrous alloys are worked between 300 and 700 (degrees) F. This phenomenon may be observed at the working temperature or subsequently at lower temperatures.
(english) A layout solution which turns a copper color when applied to a clean,polished metal surface.
(english) A flat cold rolled usually .70/.80 medium high carbon steel strip, blue-black in color, which has been quenched in oil and drawn to desired hardness. While it looks and acts much like blue tempered spring steel and carries a Rockwell hardness of C44/47, it has not been polished and is lower in carbon content. Used for less exacting requirements than clock spring steel, such as snaps, lock springs, hold down springs, trap springs, etc. It will take a more severe bend before fracture than will clock spring, but it does not have the same degree of spring-back.