一、前言 钛合金具有其它金属(铝、钢)不可比拟的优越性:比重小、比强度高、抗腐蚀性好,特别适宜在腐蚀性介质下工作。随着我国石油化工工业的迅猛发展,钛泵、阀等铸件的需求量日益增多。钛铸件如大口径的钛泵阀一般采用石墨加工型或捣实型来制作。对小口径形状复杂的泵、阀等则采用熔模精铸。 First, the preface Titanium alloy with other metals (aluminum, steel) incomparable superiority: a small proportion, high strength, good corrosion resistance, especially suitable for working in corrosive media. With the rapid development of China’s petrochemical industry, titanium pumps, valves and other castings are in increasing demand. Titanium castings, such as large-diameter titanium pump valves generally use graphite or tamping to produce. Small-caliber complex shape of the pump, valves and other investment casting is used.