冷却方式对H13A硬质合金切削性能试验分析  

Effect of Cooling Method on Cutting Performance of H13A Cemented Carbide Tool

作　　者：石莉[1] 姜增辉[1] Shi Li;Jiang Zenghui(School of Mechanical Engineering,Shenyang Ligong University,Shenyang 110159,China;不详)

机构地区：[1]沈阳理工大学机械工程学院,沈阳市110159

出　　处：《工具技术》2021年第3期37-39,共3页Tool Engineering

摘　　要：在MAZARK车铣加工中心和高速铣床上选用切削速度150m/min和200m/min进行顺铣干/湿切削加工,采用H13A硬质合金刀具对TC4钛合金进行高速车铣和高速铣削加工试验。分别对比分析两种加工方式下冷却方式不同时的刀具磨损形态,结果表明:干切削时,无论正交车铣或高速铣削,刀具都是以粘结磨损为主;正交车铣干切削时,刀具表面有较多的切屑粘结物,易形成积屑瘤;切削液条件下,刀面粘结物相对减少,切屑粘走刀具材料,形成较多的粘结凹坑;铣削干切削时,粘结到刀面的切屑较正交车铣少,但切屑粘走刀具材料更为严重,前刀面出现较深的月牙洼,采用切削液时前刀面出现层状剥落。试验表明,当金属切除率一定时,正交车铣干切削金属切出总量最大,刀具寿命最长,湿切削加工时刀具寿命较短,切削液对刀具磨损形态和刀具寿命影响较大,可能与热交变应力和Co元素流失有关。试验结果表明,H13A刀具正交车铣钛合金干切削时切削性能较好。The tests are performed on MAZAK machining center and high-speed milling machine,under the conditions of cutting speeds v=150m/min and v=200m/min,down and dry cutting or wet cutting.The cemented carbide tool H13A is used to carry out high-speed milling and orthogonal turn-milling experiments on titanium alloy TC4.The results show that in dry cutting,whether high-speed milling or orthogonal turn-milling,adhesion wear is the main wear pattern of the tools.When dry orthogonal turn-milling is applied,there are more adhesive chips,easily forming built-up edges.While cutting fluid is applied,there is less adhesive chips on the rake face,and the chips falling off from the cutting tool take more tool material way,thus more adhesive pits are formed.When dry milling is applied,the chips adhering on the rake face are less than that in orthogonal turn-milling,but more tool material is taken away by adhesive chips,thus deeper craters on the rake face are formed.When wet cutting is applied,delamination appears on the rake face.The experimental results show that when the metal removal rate is constant,orthogonal dry turn-milling has the largest metal removal and the longest tool life,and when the wet cutting is applied,the tool life is shorter and the cutting fluid has a great influence on the tool wear form and tool life,the main reason of which may be related to the thermal alternating stress and Co element loss.As a result of the experiments,the better cutting performance of H13A tool is found when orthogonal dry turn-milling is applied to machine titanium alloy TC4.

关 键 词：硬质合金 冷却方式 磨损形态 切削性能 

分 类 号：TG506[金属学及工艺—金属切削加工及机床] TH142[一般工业技术—材料科学与工程]