新型消音钢材 日本一家公司研制成一种新型的消音钢材,它是在钢材中加入一定数量的铬和铝制成的,其消音能力比通常结构的钢材强几百倍。用这种钢制造的门、窗即使用力敲 焊接处不会开裂的钢板 日本住友金属工业公司制造了一种在焊接处不会开裂的新型钢板,它是通过分析开裂机理而改变钢板中碳等元素含量制成的。新型钢板为减少碳和杂质的混入而减 A new type of silencer steel Japanese company developed a new type of silencer steel, which is added to the steel by a certain amount of chromium and aluminum, the silencer capacity than the usual structure of the steel several hundred times stronger. Doors and windows made of this steel are not cracked by force at the welding point. Sumitomo Metal Industries Co., Ltd. has created a new type of steel plate that does not crack at the welding place by changing the mechanism of cracking and changing the carbon, etc. in the steel plate Made of elemental content. New steel plate to reduce the mix of carbon and impurities less