重金属粉状扎针冷冲压的(de)(de)执政之基新工艺步骤(zhou)之一是：起首(shou)是拔(ba)取适(shi)(shಞi)合MIM提(ti)起的(de)(de)废金属粉化和黏接(jie)剂，又被(bei)称为在(zai)一 定摄氏度下接(jie)受适(shi)(shi)当(dang)的(de)(de)方法将粉化和黏接(jie)剂杂质(zhi)成一般的(de)(de)喂料(liao)，经制粒后在(zai)吃药热挤压，达到的(de)(de)热挤压坯颠(dian)末脱脂妥善(shan)处理后辊(gun)道窑低密度化变ꦺ(bian)成了(le)终产品。

1.MIM颗(ke)粒(li)及制粉手(shou)工艺(yi)

　　MIM对持料(liao)粉(fen)丝标(biao)准较高，粉(fen)丝的(de)(de)(de)挑好(hao)要(yao)有(you)用(yong)于混炼、打吊(diao)针注射成型、脱脂和辊道窑，而这长长是(shi)互相抵触情绪的(de)(de)(de)，对MIM原料(liao)粉(fen)丝的(de)(de)(d💧e)研究是(shi)指(zhi)：粉(fen)丝外貌、颗粒(li)和颗粒(li)构成、比的(de)(de)(de)外表等，表1中例(li)举了(le)合(he)适(shi)的ღ(de)(de)(de)于MIM用(yong)的(de)(de)(de)原料(liao)粉(fen)丝的(de)(de)(de)性情。

 　　毕竟MIM材(cai)质粉丝ajax请求(qiu)很细，MIM材(cai)质粉丝价格都❀较高，有🌜(you)的(de)甚至是达 到以往PM粉丝价格的(de)10倍，这才是今时皮肤返场MIM手艺活(huo)都用的(de)一两个关头身(shen)分，今时主(zhu)产地MIM用材(cai)质粉丝的(de)方法首选有(you)羰基法、超(chao) 超(chao)压力水做吸雾法、超(chao)压力气态做吸雾法等(deng)。

2.黏(nian)接剂　

　　黏结(jie)剂(ji)是(shi)MIM手工艺的(de)核 心，在MIM中(zhong)黏结(jie)剂(ji)配备条件进(jin)一(yi)步加强行(xing)为性(xing)以比较好(hao)打吊针挤(ji)压(ya)成型和坚持学习(xi)坯(pi)块外型这两种根本的(de)可以可以，别的(de)它还应配备条件不易除水、无 致(zhi)癌性(xing)、赚了钱秉公等特色(se)化，在此展现了各(ge)种类型百比作(zuo)黏结(jie)剂(ji)，最进(jin)几年以来正进(jin)一(yi)步从(cong)仅靠通(tong)过(guo)辨(෴bian)别向遵照对(dui)脱脂原则及对(dui)黏结(jie)剂(ji)保健作(zuo)用(yong)的(de)提起，有共性(xing)性(xing)地(di)思(si)路黏结(jie)剂(ji)软件系统的(de)标志需求什么是(shi)成长(zhang)。

　　胶结剂(ji)普通型是由低份子组(zu)(zu)元(y💝uan)(yuan)与高(gao)份子组(zu)(zu)元(yuan)(yuan)加进去一点要的(de)扩大剂(ji)组(zu)(zu)成部分。低份子组(zu)(zu)元(yuan)(yuan)用(yong)户(hu)粘(zhan)(zhan)度(du)指数低，主(zhu)题活动性好，易脱去；高(gao)份子组(zu)(zu)元(yuan)(yuan)用(yong)户(hu)粘(zhan)(zhan)度(du)指数高(gao)，抗(kang)(kang)拉抗(kang)(kang)弯强度(du🐠)高(gao)，坚持学习注射成型坯抗(kang)(kang)拉抗(kang)(kang)弯强度(du)。三(san)者合理(li)比例表搭搭配(pei)拿得高(gao)的(de)粉(fen)末(mo)状原材料装载的(de)容量量，终拿得高(gao) 精 度(du)和高(gao)均性的(de)货物。

3.混(hun)炼　

　　混炼是将金属粉末与粘结剂夹杂取得平均喂料的进程。因为喂料的性子决议了终打针成形产物的机能，以是混炼这一工艺步骤非 常主要。这牵扯到粘结剂和粉末插手的nents to make them melt, then cool, add low melting point components, and then add metal powder in batches. This prevents the low melting point components from vaporizing or decomposing, and adding metal powder in batches can prevent excessive torque increase and equipment loss. For the feeding method of powders of different sizes, the Japanese patent introduces: first add the coarser 15-40um water atomized powder to the binder, then add 5-15um powder, and then add the powder with degree ≤5um. The shrinkage of the final product changes little. In order to evenly coat a layer of binder around the powder, it is also possible to directly add the metal powder to the high melting point componenadictory. Research on MIM raw material powders includes: powder shape , Particle size and particle size composition, specific surface, etc., Table 1 lists the properties of the raw material powder suitable for MIM. Due to the very fine requirements of MIM raw material powders, the prices of MIM raw material powders are generally higher, and some even reach 10 times the price of traditional PM powders. This is currently a key factor restricting the widespread application of MIM technology. The current methods for producing MIM raw material powders are mainly There are carbonyl method, ultra high pressure water atomization method, high pressure gas atomization method, etc. 2. Binder Binder is the core of MIM technology. In MIM, the binder has two basic functions of enhancing fluidity to be suitable for injection molding and maintaining the shape of the billet. In addition, it should have easy removal and no Due to its toxicity and reasonable cost, a variety of adhesives have appeared for this purpose. In recent years, it has gradually moved from the selection of experience alone to the design of adhesives in accordance with the requirements of degreasing methods and the function of adhesives. The development of the agent system.　　 The binder is generally composed of low molecular components and high molecular components plus some essential additives. Low-molecular components have low viscosity, good fluidity and easy to take off; high-molecular components have high viscosity and high strength to maintain the strength of the formed blank. The two are matched in an appropriate ratio to obtain a high powder loading, and finally a product with high accuracy and uniformity is obtained. 3. Kneading 　　　 Kneading is the process of mixing metal powder and binder to obtain a uniform feed. Because the nature of the feed determines the performance of the final injection molded product, this process step of mixing is very important. This involves the addition of binders and powders