課程名稱機(jī)械制造技術(shù)基礎(chǔ)雙語(yǔ)a-wenkub
2023-07-09 06:22:00 本頁(yè)面
【正文】 speed steels高速鋼是加入了較多的鎢（）、鉬（）、鉻（）、釩（）等合金元素的高合金工具鋼。普通高速鋼是切削硬度在以下的大部分結(jié)構(gòu)鋼和鑄鐵的基本刀具材料。粉末冶金高速鋼材質(zhì)均勻，韌性好，硬度高，熱處理變形小，質(zhì)量穩(wěn)定，刃磨性能好，刀具壽命較高。但硬質(zhì)合金的強(qiáng)度和韌性比高速鋼差。此類硬質(zhì)合金不宜加工不銹鋼和鈦合金。這類硬質(zhì)合金既可以加工鑄鐵和有色金屬，又可以加工鋼料，還可以加工高溫合金和不銹鋼等難加工材料，有通用硬質(zhì)合金之稱。教學(xué)內(nèi)容提要時(shí)間分配備注TABLE 22 Designations, properties and application fields of CarbidesTypesDesignationsPhysical dynamic propertiesUsabilityApplication fieldsSuitable designations Hardness/HRABending strength/GPaWare resistanceImpact resistanceHeat resistanceMaterialsMachining charactersKYG391↑↓↑Cast iron,nonferrous metalFinishing and semifinishing in continuous cuttingK05YG6X91Cast iron,heatresistant alloyFinishing and semifinishingK10YG6Cast iron,nonferrous metalFinishing in continuous cutting semifinishing in interrupted cuttingK20YG889Cast iron,nonferrous metalRoughing in interrupted cuttingK30PYT5↓↑↓SteelRoughingP30YT14SteelSemifinishing in interrupted cuttingP20YT1591SteelRoughing in continuous cutting semifinishing in interrupted cuttingP10MYW192Relatively goodRelatively goodHard machining steelsFinishing and semifinishing
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