硬さ 化学特性,用途語,生産方法
解説
① 物体の硬さ(軟らかさ)の程度を表す用語．定量的に定義するのはむずかしく，実際には，鋼鉄やダイヤモンドの圧子などを一定の力で押し付けたときのくぼみの大きさ(ビッカース硬さ)，あるいは一定の高さから球を落としてはね返る高さによって比較する(ショア硬さ)ことが多い．また，標準に選んだ鉱物で傷をつけて決めたりする(モース硬さ，ロックウェル硬さ)．② 粒子線，電磁波の透過力などを表すときに用いることがある．たとえば硬X線と軟X線．
农业用途
The resistance of a pesticide or detergent to decomposition or biodegradation is known as hardness or persistence.
Hardness also means the proportion of calcium carbonate or calcium sulphate contained in a given sample of water. Based on the presence of calcium and magnesium salts, water can either have temporary hardness or permanent hardness.
Hardness is also the resistance of a material to deformation of an indenter of specific size and shape under a known load. The definition applies to all types of hardness scales, except the Mohs-scale which is based on the concept of scratch hardness and used chiefly for minerals.
The most generally used hardness scales are Brine11 (for cast iron), Rockwell (for sheet metals and heat treated steel, diamond, pyramid, hoop) and scleroscope (for metals). Durometer hardness is used for softer materials like rubber and plastic.
Extremely shortwave radiation is also known as hardness. For example, hard-x-rays.
硬さ 上流と下流の製品情報
原材料
準備製品