A new process for preparing titanium check valve by multiple forging annealing is introduced. The amount of O is controlled by adding titanium dioxide to the metal titanium, and the amount of O is not more than 0.25%. After homogeneous mixing, the electrodes are pressed into 50 kg electrodes by a 2000 ton hydraulic press. The electrodes are welded by plasma welding, the titanium ingots are inspected, the cap is taken, and then annealed after forging for three times. Finally, the electrodes are machined to obtain high quality. Density check valve. The preparation method of the high-density check valve of the invention is that the metal titanium is made into titanium ingot by piezoelectric motor and assembly welding, then forged and retreated three times, and machined to obtain a high-density check valve, which has better compactness, fatigue resistance, long service life and excellent performance than the gate valve obtained by the existing casting method.
【技术实现步骤摘要】
多重锻造退火制备钛质止回阀新工艺
本专利技术属于钛材料闸阀的制备
,具体涉及一种高密度止回阀的制备方法
技术介绍
通常闸阀的制备方法是将钛粉熔炼成钛液,然后将其浇注到专用模具中得到。该方法在浇注过程中容易产生气泡,得到的闸阀的密实度不好,且成本较高,做模具时间较长。
技术实现思路
本专利技术的目的是提供一种多重锻造退火制备钛质止回阀新工艺,解决了现有方法制备得到的闸阀密实度不好的问题。本专利技术所采用的技术方案是,一种多重锻造退火制备钛质止回阀新工艺,具体按照以下步骤实施:步骤1,向金属钛中加入TiO2,控制O的量不超过0.25%,混合均匀后采用2000吨的油压机压成50公斤一块的电极,将电极采用等离子焊接进行组焊,;步骤2,对步骤1得到的钛锭进行探伤,取帽口,然后锻造三次后进行退火处理,最后经过机械加工,得到高密度止回阀。本专利技术的特点还在于,步骤1中金属钛为0级或一级金属钛,控制金属钛中Mn≤0.07%,O≤0.22%,S≤0.015%,Cl≤0.015%,H≤0.006%。步骤1中真空熔炼采用直流电,第一次真空熔炼时电流为6000~12000A,第二次真空熔炼时电流为15000~18000A。步骤2中三次锻造的具体实施过程为:首先在温度为1000℃~1020℃下保温265~275miS后擞拔4次,然后在950℃~960℃下保温195~205miS后擞拔2次,最后840℃~860℃下保温145~155miS,得到钛坯材。步骤2中退火处理是在650~680℃保温1.8~2h。本专利技术的有益效果是,本专利技术高密度止回阀的制备方法,将金属钛经过压电机 ...
【技术保护点】
1.一种多重锻造退火制备钛质止回阀新工艺,其特征在于,具体按照以下步骤实施:步骤1,向金属钛中加入TiO2,控制O的量不超过0.25%,混合均匀后采用2000吨的油压机压成50公斤一块的电极将电极采用等离子焊接进行组焊;步骤2,对步骤1得到的钛锭进行探伤,取帽口,然后锻造三次后进行退火处理,最后经过机械加工,得到高密度止回阀。
【技术特征摘要】
1.一种多重锻造退火制备钛质止回阀新工艺,其特征在于,具体按照以下步骤实施:步骤1,向金属钛中加入TiO2,控制O的量不超过0.25%,混合均匀后采用2000吨的油压机压成50公斤一块的电极将电极采用等离子焊接进行组焊;步骤2,对步骤1得到的钛锭进行探伤,取帽口...
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