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    对(duì)于强度、塑性和韧(rèn)性要求更高的机(jī)器零件,需要(yào)采用铸钢件(jiàn),铸钢件的产量仅次于铸铁,约占铸(zhù)件(jiàn)总产量(liàng)的15%。  一、按照化学成分铸钢可分为碳素(sù)铸钢和合金铸钢两大(dà)类。其中以碳素铸钢应(yīng)用最广,占铸钢(gāng)总(zǒng)产量的(de)80%以上。   1、碳素铸钢   一般的,低(dī)碳钢(gāng)ZG15的熔点较高(gāo)、铸(zhù)造性能差,仅用于制造电机零件或渗碳零件;中碳(tàn)钢ZG25~ZG45,具(jù)有高于各类铸铁的综合性(xìng)能,即(jí)强度高、有优良的塑性和韧性,因此(cǐ)适于制造(zào)形(xíng)状复杂、强度(dù)和韧性要求高的零件,如火车车(chē)轮、锻锤机架和砧座、轧辊和(hé)高压(yā)阀门(mén)等(děng),是碳素铸钢中应用最多的一(yī)类(lèi);高碳钢(gāng)ZG55的熔点低,其铸(zhù)造性能较(jiào)中碳钢的好,但其(qí)塑性和韧性较(jiào)差,仅(jǐn)用于制造少(shǎo)数的耐磨件。   2、合金(jīn)铸钢   根据合金元素总量的多(duō)少(shǎo),合金铸钢可分(fèn)为两低合金钢和高合金钢大类。   (1)低合金铸钢(gāng),我国主要应用锰(měng)系(xì)、锰(měng)硅系及铬(gè)系等。如ZG40Mn、ZG30MnSi1、ZG30Cr1MnSi1等。用来制造齿轮、水压(yā)机工(gōng)作缸和水轮机转子等零件,而ZG40Cr1常用来制造高强度齿轮和高强度轴等重要受力(lì)零件。   (2)高合金铸钢,具有耐磨(mó)、耐热或耐腐蚀等特殊性能。如高锰钢ZGMn13,是一种抗磨(mó)钢,主要用于制造在干磨(mó)擦工作(zuò)条(tiáo)件下使用的(de)零(líng)件,如挖掘机的抓斗前壁(bì)和抓(zhuā)斗齿、拖拉机和坦克的(de)履带等;铬镍不锈钢ZG1Cr18Ni9和铬不锈钢ZG1Cr13和ZGCr28等(děng),对(duì)硝酸的耐腐(fǔ)蚀性(xìng)很高,主要用(yòng)于制造化工、石油(yóu)、化纤和食品(pǐn)等设备上的零件。   二、铸钢(gāng)的铸造工艺特(tè)点   铸(zhù)钢的(de)机械性能比铸(zhù)铁高,但其铸造性能却比铸铁差。因为铸(zhù)钢的熔点较高(gāo),钢液易(yì)氧化、钢水的流动性差(chà)、收缩大,其体收缩率为(wéi)10%~14%,线收(shōu)缩(suō)为1.8%~2.5%.为防止(zhǐ)铸钢件产(chǎn)生浇(jiāo)不足、冷隔、缩孔和缩(suō)松、裂纹及粘砂等缺陷,必须采取比铸铁复杂的工艺措施:   1、由于钢液的流动性差,为防止铸钢件产(chǎn)生冷隔和浇不足,铸钢件的壁厚不能小于8mm;浇注系统的结构力求(qiú)简单、且截面尺寸比(bǐ)铸铁的大;采(cǎi)用干铸型或热铸型;适当提(tí)高浇注温(wēn)度,一般为1520~1600℃,因为(wéi)浇注温度高(gāo),钢水的过热度大、保持(chí)液态的时间长(zhǎng),流动性可得(dé)到(dào)改善。但是浇温过高,会引(yǐn)起晶粒粗大、热(rè)裂、气(qì)孔和粘(zhān)砂等(děng)缺陷。因(yīn)此一般(bān)小型、薄壁(bì)及形状复杂的铸件,其浇注温(wēn)度约为(wéi)钢(gāng)的熔点温度+150℃;大(dà)型、厚壁铸件的浇注温度比(bǐ)其熔点高(gāo)出100℃左(zuǒ)右。   2、由(yóu)于铸(zhù)钢的收缩大大超过铸(zhù)铁,为防止铸件出现缩孔、缩松缺(quē)陷,在(zài)铸造工艺上大(dà)都采用(yòng)冒口和、冷铁和补贴等措(cuò)施,以实现(xiàn)顺序凝固。   此外,为防(fáng)止(zhǐ)铸钢件(jiàn)产生缩孔、缩松、气(qì)孔和裂纹缺陷(xiàn),应(yīng)使其壁厚均(jun1)匀、避免尖角和直角结构(gòu)、在铸型(xíng)用型砂中加(jiā)锯末、在型芯中加焦炭、以及采用空(kōng)心型芯和(hé)油砂芯(xīn)等来改善砂型(xíng)或型芯的退(tuì)让性和透气性。   铸钢(gāng)的熔点高(gāo),相应(yīng)的其浇注温度也高(gāo)。高温(wēn)下(xià)钢水与(yǔ)铸型(xíng)材料相互(hù)作用,极(jí)易产生(shēng)粘砂(shā)缺陷。因此(cǐ),应(yīng)采用耐(nài)火度较(jiào)高的人造石(shí)英砂(shā)做铸型,并在铸型表(biǎo)面刷(shuā)由石英粉或锆(gào)砂粉制得的(de)涂料(liào)。为减少(shǎo)气体来源、提高钢水流动性及铸型强度,大多铸钢(gāng)件用干型或(huò)快干(gàn)型来铸造,如采用CO2硬化的水玻(bō)璃砂型。   三、铸钢件的热处理(lǐ)   铸钢件均应在热处理后使用。因为(wéi)铸态下的铸钢(gāng)件内部存在(zài)气孔(kǒng)、裂纹、缩孔和缩松、晶粒粗(cū)大、组织不均(jun1)及残余内(nèi)应力等铸造(zào)缺(quē)陷(xiàn),使铸(zhù)钢件(jiàn)的(de)强(qiáng)度、尤其是塑(sù)性和(hé)韧性大大降低。   为细化晶粒(lì)、均匀组(zǔ)织及(jí)消除(chú)内(nèi)应力,铸钢件必(bì)须进行正火或退火处理。正(zhèng)火处(chù)理后的钢,其机械性能较退火后的高,成本也较低,所以应用较多。但由于正火处理会引起较退(tuì)火大(dà)的内应力,只适(shì)用于含碳量小于0.35%的铸钢件(jiàn)。因为低碳(tàn)铸钢件的塑性好,冷却时不易开裂。为减小(xiǎo)内应(yīng)力,铸(zhù)钢件在正(zhèng)火后,还应进行(háng)高温(wēn)回火。对于含碳(tàn)量≥0.35%的、结构复杂及易(yì)产生(shēng)裂纹的铸(zhù)钢(gāng)件,只能进(jìn)行退火处理(lǐ)。铸(zhù)钢(gāng)件不宜(yí)淬(cuì)火(huǒ),否(fǒu)则极易开裂。   四、铸钢的熔炼   铸钢的熔炼一般(bān)采(cǎi)用平炉,电弧炉和(hé)感应(yīng)炉等。平炉的特点是容量大、可利(lì)用废钢作原料、能准确控(kòng)制钢的成分并能熔炼优质钢及低合金钢,多用于熔炼质量要求(qiú)高的、大型铸(zhù)钢件用的钢液(yè)。   三相电弧炉的(de)开炉和(hé)停炉(lú)操作方便,能保证钢液的成分(fèn)和质量、对炉料的要求不甚严(yán)格、容易(yì)升温,故能(néng)炼优质钢、高级(jí)合金钢(gāng)和(hé)特殊钢等,是生产成型铸钢件的常用设备。   此外,采用工频或中频(pín)感(gǎn)应炉,能熔炼各种高级合金(jīn)钢和碳(tàn)含量(liàng)极低(dī)的钢。感应炉(lú)的熔炼速(sù)度(dù)快、合金元素(sù)烧损小(xiǎo)、能源消耗少、且(qiě)钢(gāng)液质量高,即杂质含量少、夹(jiá)杂少。 

    2025-01 01

    全体荣誉
            热烈祝贺,在2024年九亿集团(tuán)年度总结中, JDB公司的主业是以基础设施建设工程和冶金矿山等为主题的装备制造业。公司主要产品有凿岩机、凿岩钻车钻架、凿岩钎具和气动工具等四个大类。产品广泛应用于交通设施、水电工程、能源开发、国防建设和机械制造等领域。和顺祥(xiáng)机械被评(píng)为(wéi)“2024年年度优秀(xiù)供应(yīng)商”该荣誉的(de)获得离(lí)不(bú)开董(dǒng)事长侯(hóu)战(zhàn)强,总经理张桥(qiáo)梁的英(yīng)明(míng)领导(dǎo),离(lí)不开全(quán)体员工(gōng)的共同努力,更离不开全体(tǐ)员工家属的大(dà)力支持,希望(wàng)在新的一年里(lǐ)全(quán)体 JDB公司的主业是以基础设施建设工程和冶金矿山等为主题的装备制造业。公司主要产品有凿岩机、凿岩钻车钻架、凿岩钎具和气动工具等四个大类。产品广泛应用于交通设施、水电工程、能源开发、国防建设和机械制造等领域。和顺祥人共同努力,再创辉煌(huáng)!

    2024-12 30

    铸件(jiàn)缺陷(xiàn)的修补方法
    铸件在(zài)生产过程中由于操作工艺或者经(jīng)验的问题,都会导(dǎo)致铸(zhù)件出现缺陷,这(zhè)时候为了使铸件能够达到使用标准,减(jiǎn)少(shǎo)损(sǔn)失(shī)浪费(fèi),往往会对缺(quē)陷进行修(xiū)复,那修(xiū)复方(fāng)法都有哪些呢?       一、铸(zhù)工胶水:简单,粗放的铸件(jiàn),一般(bān)修补处不(bú)需要后续(xù)加工,且没有特殊的强度硬度(dù)要求。这(zhè)类铸件附加值比较低。      二、焊补:90%以上的铸造厂家都选(xuǎn)择焊补来解决生产中遇到(dào)的(de)铸造(zào)缺陷。焊补修复因(yīn)采用(yòng)了金属填充料,焊补处性能(néng)基本可以(yǐ)达(dá)到母材的标准,且操作简单,焊补效率高,受到许多厂家的认可和(hé)信赖。目前市场上(shàng),焊机种类比较多,应用在缺陷修复上,大体有以下几种:      电焊机:铸铁(tiě)、铸钢件焊补多采(cǎi)用的传(chuán)统方式。      优点:修复大缺陷,效率高(gāo)。      缺点:焊后焊点上(shàng)硬(yìng)度过高,内部有应力,容易产生裂纹(wén),一般还需要退火(huǒ)热处理才可以满足加工要(yào)求(qiú)。且因焊接条件限制,内部容易(yì)产(chǎn)生气孔(kǒng)、夹渣等二次缺陷(xiàn)。  氩弧焊:精密铸件,铝合金压铸件多采用氩弧(hú)焊机焊补。部(bù)分模具制造和(hé)修复厂家,也采用该焊机(jī)修复模具(jù)缺陷。      1、优点:焊补效率高(gāo),精度较(jiào)电焊机高。焊(hàn)丝种类较多,不锈(xiù)钢、铝合金产品上应用(yòng)最(zuì)广。可用于焊接,强度教(jiāo)高。      2、缺点(diǎn):用于缺陷修复,小缺(quē)陷修复(fù)时,因(yīn)冲击过大(dà),熔池(chí)边线有痕迹。焊补(bǔ)钢(gāng)件(jiàn)有硬点。由于热影(yǐng)响,焊补(bǔ)有(yǒu)色铸(zhù)件或薄壁件时(shí),易产生热变形。操(cāo)作技术要求较高。      三、冷焊机(jī):是(shì)21世纪初新诞生的修复技术,因焊补(bǔ)过(guò)程中(zhōng)工件产生热量极小,被成为(wéi)冷焊机。经(jīng)过(guò)几年的(de)发(fā)展,焊(hàn)机应用方向(xiàng)和技(jì)术都得到(dào)了很大(dà)的(de)发展,已经在修(xiū)复市场占有很大的份额。按(àn)照修补产品分类(lèi)有:贴片机(jī)和电火花堆焊(hàn)修(xiū)复机(jī)。     贴片机(jī):采用瞬间高频(pín)放电原理(lǐ)将焊(hàn)片粘(zhān)贴(tiē)到(dào)工件表(biǎo)面,每次粘贴厚度最大等同与焊片厚度,焊接质(zhì)量取决于放电是否均(jun1)匀。适(shì)合(hé)于(yú)工(gōng)件(jiàn)磨损(sǔn),加(jiā)工超差修复,在模(mó)具市场具有一定影响力。该机(jī)器也可(kě)以将焊粉,填(tián)充到缺陷处(chù),经(jīng)放电后修复。修(xiū)复后的工件色(sè)差小。缺点是修补的速度较慢。冷焊机,共同的缺点是(shì),焊补效率不(bú)如(rú)电焊机(jī)和氩弧焊(hàn)机高,但在修复毫米级缺陷和加工面缺陷时,其突出的(de)优势使人们更青睐于选(xuǎn)择冷(lěng)焊。

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    JDB公司的主业是以基础设施建设工程和冶金矿山等为主题的装备制造业。公司主要产品有凿岩机、凿岩钻车钻架、凿岩钎具和气动工具等四个大类。产品广泛应用于交通设施、水电工程、能源开发、国防建设和机械制造等领域。和顺祥90后00后人才陪跑计划
    JDB公司的主业是以基础设施建设工程和冶金矿山等为主题的装备制造业。公司主要产品有凿岩机、凿岩钻车钻架、凿岩钎具和气动工具等四个大类。产品广泛应用于交通设施、水电工程、能源开发、国防建设和机械制造等领域。和顺祥公司(sī)推(tuī)出针对90后及00后的人才培养计(jì)划,该计划每年投入3万至20万元资金,旨在树立员(yuán)工职业理想,提(tí)升个人能力,培养(yǎng)职业爱好。培训(xùn)内(nèi)容涵盖专业知识与岗位技能,确保员工(gōng)全面发展。此外,每半个月举行一次例会,以加强沟通与协作;今天举行挂牌仪式,由(yóu)张(zhāng)总担任组长亲自挂牌,办公室主任郝(hǎo)毅康负责具体事务。同时,公司还将(jiāng)聘请(qǐng)行业(yè)专家进行指导培训,以提(tí)升培训质量和效果。 一、培养目标(biāo) 1. 培养具有扎实的机(jī)械制图基础、较强的计(jì)算机辅助设计(CAD)和计算机(jī)辅(fǔ)助制造(zào)(CAM)能力的青(qīng)年人才;2. 培(péi)养具(jù)备良(liáng)好的生产工艺和质量控制意(yì)识(shí)的青年人才,确(què)保产品(pǐn)的质量和生产效率;3. 培(péi)养具备独立(lì)进(jìn)行各工(gōng)序(xù)设计、制造、维修(xiū)和调整能力的青年(nián)人才;4. 培(péi)养(yǎng)具备较(jiào)高操作技能(néng)和(hé)安(ān)全(quán)意识的(de)青年(nián)人才,降低生产过(guò)程中(zhōng)的(de)安全事故风(fēng)险及质量风险。 二、课程设(shè)置 1. 机械制图(tú)基(jī)础:包括机(jī)械制图基本概念、基本原理(lǐ)、图形符号、投影法等;2. CAD/CAM技术:AutoCAD、procast、SolidWorks等(děng)CAD/CAM软件的培训和(hé)使用;3. 铸造(zào)工艺学(xué):砂型(xíng)铸造的原理、工艺流程、质(zhì)量控制方法等(děng);              4. 模具设计(jì)与制造:模具设计(jì)原理、结(jié)构分析(xī)、材料选用、制造工艺等(děng);5. 造型(xíng)合箱:型砂的性能(néng)及检测、造型(xíng)方法、合箱(xiāng)操作等;6. 熔炼浇注:金属(shǔ)材料的基(jī)础知(zhī)识、冶炼(liàn)方法、浇注过程(chéng)及常见(jiàn)问题处理等(děng);7. 其他相关(guān)环节:如热(rè)处理、表面处理(lǐ)、质量检测(cè)等(děng)。8. 结合本人技能,岗位,爱(ài)好(hǎo)进行专门培训(xùn)等。三、教学方法 1. 理论教学:采用多媒体课件、实物演示、案例分析等(děng)多(duō)种方式进行讲(jiǎng)解,使(shǐ)学员能够全面理解(jiě)知(zhī)识点;2. 实践操(cāo)作:通(tōng)过现场教(jiāo)学(xué)、模拟操(cāo)作等(děng)方式,让学员亲自操作设备(bèi),增强动手能力(lì)和实践经验;3. 项目实践:结合企业实际生产案例,让学(xué)员参(cān)与项目实施,提高分析和解(jiě)决问(wèn)题的(de)能力;4. 课程评价:采用课堂测(cè)验、作业提(tí)交、项目成果(guǒ)展示等(děng)多种方(fāng)式,对学员的学习效(xiào)果进行综合评价。 四、培训周期 培训周期为(wéi)6个月,分(fèn)为(wéi)两(liǎng)个(gè)阶段(duàn)进(jìn)行。第一阶段(第1-3个月(yuè))为(wéi)基础课程学习和实(shí)践操作(zuò)练习阶段;第二阶段(第4-6个(gè)月)为专业课程学习和项目实(shí)践(jiàn)阶段。 五、后续发展与(yǔ)跟踪 1. 培训结束后,为(wéi)学(xué)员(yuán)提供一(yī)定期限的实践机会,以便于将所学知识应用于实(shí)际工作中(zhōng);2. 定期关(guān)注学(xué)员的工作表现(xiàn)和发(fā)展情况,及时给予指(zhǐ)导和(hé)支持(chí),帮(bāng)助(zhù)学员解决实(shí)际(jì)问(wèn)题;3. 建立完善的激励机制,对取得优异成(chéng)绩的学(xué)员给予表彰(zhāng)和奖励,激发他们的工作热情和(hé)创新精神。  本青年(nián)人才陪跑计(jì)划旨在全面提高 JDB公司的主业是以基础设施建设工程和冶金矿山等为主题的装备制造业。公司主要产品有凿岩机、凿岩钻车钻架、凿岩钎具和气动工具等四个大类。产品广泛应用于交通设施、水电工程、能源开发、国防建设和机械制造等领域。和顺祥青年人才的技能(néng)和素质,为企(qǐ)业的发展(zhǎn)提(tí)供有(yǒu)力的人才(cái)保(bǎo)障。我们将不断(duàn)优化课程设置和教学方式,确保培养出更多优秀的(de)铸造人才,作为扩大生(shēng)产后车间中层管理及推进数字化改造干部储备人才,推动 JDB公司的主业是以基础设施建设工程和冶金矿山等为主题的装备制造业。公司主要产品有凿岩机、凿岩钻车钻架、凿岩钎具和气动工具等四个大类。产品广泛应用于交通设施、水电工程、能源开发、国防建设和机械制造等领域。和顺祥铸造产业的发展。 2024年12月25日 JDB公司的主业是以基础设施建设工程和冶金矿山等为主题的装备制造业。公司主要产品有凿岩机、凿岩钻车钻架、凿岩钎具和气动工具等四个大类。产品广泛应用于交通设施、水电工程、能源开发、国防建设和机械制造等领域。和顺祥90后00后(hòu)人才陪跑办公室

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    消失模(mó)的砂眼及气孔的解(jiě)决方法
    1、  砂(shā)眼(或白灰)铸件的致命缺陷(xiàn),重则报废。要做到(dào):①、 浇口杯(bēi)、直浇道、横浇道(dào)、内浇道(dào)与铸件封闭结合严密。如不严密,在负压的作用(yòng)下(xià)就会吸入砂子,所以装箱(xiāng)者(zhě)一定要精心操(cāo)作(zuò),把好(hǎo)各(gè)关(guān)口(kǒu)。任何一(yī)个薄(báo)弱环节或疏忽都会(huì)造成此类缺(quē)陷(xiàn)。②浇注系统多刷一遍涂料以增强其强度。③涂料的强度、透(tòu)气(qì)性、刚度、耐火度(dù)、暴热抗(kàng)烈(liè)性也(yě)很重要(yào),因(yīn)为在运输、装填(tián)砂、震动时(shí)都会(huì)出现(xiàn)破(pò)坏、变形、开裂、脱落。④震实时,开始幅度要小,待填满砂时再振幅大些(xiē)。⑤浇口杯无浮砂、尘土等(děng)杂物。⑥浇注时,浇包嘴(zuǐ)尽量靠近(jìn)浇口杯,以免压力头过大。⑦负压过大,使金属液流经开裂、裂纹处时,吸入干砂和杂物可能性加(jiā)大(dà),粘砂严重。⑧过快的充(chōng)型速度使冲刷力加大(dà)。2、  气孔①浇(jiāo)注温(wēn)度低,充型前(qián)沿金属液不能使泡沫充分分解汽 化,未分解的残留物质来(lái)不及(jí)浮集到上面及冒(mào)口中(zhōng),汽(qì)化分解生成的气体及残留(liú)物不能及时(shí)排出(chū)铸型而凝固(gù)在铸件中,另外,摸样分(fèn)解不充分,液相残留物会(huì)堵塞(sāi)涂(tú)料层,使热(rè)解气体排出受阻,腔内形成反压力,充型流(liú)动性(xìng)下降,凝固快。②涂料透(tòu)气性差或负压不足,砂子透(tòu)气性差,不能及时(shí)排除型腔内(nèi)的气体(tǐ)及(jí)残留物,在充型压力下(xià)形成气(qì)孔。③浇注(zhù)速(sù)度慢,浇口杯未充满,暴露直浇道卷入空气,吸入杂质,形成携裹(guǒ)气孔和渣孔。④浇杯容量小(xiǎo),金属液(yè)形成涡流,侵入(rù)空气生成气孔(kǒng)。⑤浇(jiāo)口杯(bēi)及浇(jiāo)注(zhù)系统之间的连接处密封不(bú)好,尤其(qí)是直浇道和浇口杯。在负压作用下很容易形成夹砂及气(qì)孔。⑥型砂粒度(dù)太细,粉尘含量(liàng)高,透气性差,负压管道内部(bù)堵(dǔ)塞,造成负(fù)压度失真,使型(xíng)腔周(zhōu)围的负压值远低于(yú)指(zhǐ)示负(fù)压(yā),汽化物不能及时排出涂料层而形成气孔或皱皮。⑦合理(lǐ)的浇注工(gōng)艺和负压(yā)度。消失模浇注工艺是以充满封闭直浇道为原则,不(bú)能忽(hū)快忽慢、紊流、断流(liú),更不允许暴露直浇道。浇注速度,尤其(qí)是在行(háng)车提升停(tíng)顿瞬间力(lì)求平衡,不断流(liú)。进入尾期慢慢收(shōu)包,使(shǐ)渣、气、及汽化残留物(wù)有充分时间浮集到浇冒口中。负压度过大,加(jiā)剧金属液渗透粘(zhān)砂,并造成附壁效应,不(bú)利于液相泡(pào)沫被涂(tú)层(céng)吸(xī)附,生成很多气孔。适宜(yí)的负压是排气的保证,也是防止粘砂的措施。⑧模(mó)样粘合(hé)应选用专用的热熔胶或冷胶(jiāo),在(zài)保(bǎo)证粘牢(láo)的情况下,用量越少越好。尽量避免使用汽化缓慢(màn)的乳胶。