この広告は30日以上更新がないブログに表示されます。
ログイン |
Chuyen cung cap cac loai vat tu thiet bi dien chinh hang
Lop ma dong de danh bong dat den do bong rat cao, lai gan bam tot voi nhieu kim loai khac nhu thep ong Ni, Cr, Ag cho nen dong thuong duoc dung lam lop ma lot cho nhieu lop ma khac. Lop ma dong con duoc dung de chong tham cacbon cuc bo cho cac chi tiet may khi nhiet luyen. Ma dong cung dtiOc dung trong ky thuat in lam con chu, mat truc in lom, ma chep hinh Dung dich axit de ma dong gom cac dung dich sunfat, floborat, nitrat, flosilicat, sunfamat va clorua. Chung deu co thanh phan don gian, lam viec on dinh, dung duoc mat do dong dien cao, nhat la khi tang nhiet do va khuay manh dung dich. Hieu suat dong dien cao, xap xi 100%. Thanh phan chu yeu cua cac dung dich axit la muoi dong va cac axit tuong ung Khi ma, ion Cu2t phong dien tren catot o dien the kha va it thay doi khi tang hay giam mat do dong dien (tuc do phan cuc catot be), vi vay chung thuong cho lop ma co cau truc tinh the tho, to, nhung lop ma kin, chac sit. Nhuoc diem chung cua cac dung dich axit la- kha nang phan bo thap nen chi ma cho vat co hinh dang don gian, va dac biet la khong the ma truc tiep len nen gang, thep, hop kim kem va cac kim loai khac co dien the am hon dong. Boi vi khi nhung cac kim loai na}’ vao be ma dong axit lap tuc kim loai nen se day ion dong ra khoi muoi cua no va giai phong thanh lop dong kim loai phu kin khap mat kim loai nen, ngay khi chua kip noi voi dong dien ngoai, nhung tiec thay lop dong thu duoc do tiep xuc nay lai rat toi, xop, nhieu lo ho, bam rat kem voi nen. Vi vay truoc khi ma dong tu dung dich axit, cac vat bang sat thep, kem. hop kim kem can phai ma truoc (ma lot) mot lop ken mong (1-5 M-m) hay lop dong mong (2-4 um) tu dung dich xyanua, sau do rua sach roi moi ma dong axit.
Ma thep hop con (tuoc dung vao cac viec : bao ve day cap dong, chong lai tac dung cua luu huynh co trong vo caosu cach dien : lam de han cac tiep diem: tao ra tren be mat lam viec mot lop de ra khit.... Co the ma thiec cho cac vat bang thep, dong, nhom, hop kim nhom, hop kim kem. Lop ma thiec chi bao ve (luoc thep trong khong khi khi chung khong co lo xop.VANANHLop ma thiec rat deQ, chiu duoc cac bien dang co hoc nhu dot, dap, can, keo .... Lop ma thiec dien hoa co mot dac diem la la trong qua trinh bao quan , thiec se tai ket tinh thanh cac tinh the hinh chi co khi chieu dai den 5 ram. Cac tinh the.hinh chi nay co the dan den hien tuong ngan mach trong cac thiet bi dien tu . Toc do phat trien cac tinh the hinh chi ay phu thuoc vao ban chat cua nen . Thay rang tren lien kem, dong hay dong thau, toc do phat trien tinh the hinh chi cua lop ma thiec la lon nhat. Lam chay mem lop ma thiec hay ma lot mot lop mong ken truoc khi ma thiec se ngan chan duoc su phat trien cua I inh the hinh chi noi tren. VANANHNgoai phuong phap ma dien, lop thiec con duoc tao ra b phap nhung nong, phiiong phap hoa hoc (noi dien phan) ha dien phan trong nnioi nong chay.... Cac dung dich axit ma thiec thuong la dung dich sunfonat, floborat, halogenuaVANANHDung dich sunfatVANANHDung dich sunfat gom co cac chat thiec simfat, axit 1 chat hoat dong be mat. Doi khi con cho them Na2S04 de tang I dung dich . H-SO,, cho vao dung dich de giam bot su thuy pha thiec, cung nhu de khac phuc su oxy hoa thanh Sil4 V nham. Cac dung dich axit khong co mat chat huu co khong tl tua thiec vua y vi tinh the rat tho va phat trien manh thanh canh vat ma.VANANHKhi khong co phu gia, phan cuc catot trong dung dich i the thu duoc rat tho. roi rac: ngay khi dung mat do dong die tinh the van phat trien mot cach rieng re va co the vuon dai sar ngan mach giua cac cuc. Nhiing khi cho them nxit crezolsunfoni them ca keo da nua thi phan cuc catot tang len den 500 - 6 tuong sinh “cay" cung mat di. lop ma tro nen phang, nhan, min, Ma thiec tu dung dich axit co them chat hoat dong 1 nang phan bo tang len rat cao, co the ngiing voi dung dich dong suat dong dien 90-98V
Tay bong hoa hoc va dien hoa duoc dung rong rai de lam thep ong khong gi, nhom va hop kim nhom, dong va hop kim don metal, cac lop ma .... Nhung kinh te nhat la dung cho thep khon hop kim nhom, hop kim dong. Tay bong hoa hoc va dien hoa co the nang them do bong 2 cap. De co be mat bong phiiong phap co hoc phai bao mon hei mo lan vi mo, trong khi tay bong hoa hoc va dien hoa chi can nham vi mo la du, tuc la tao duoc do bong ngay tren be mat ro nhan, phang. Tay bong hoa hoc khong can den nguon dien mot chie riep dien, tay bong deu cho vat co hinh dang phuc tap voi in Nhung dung dich tay bong hoa hoc dung khong duoc lau, kho die sinh: cho do bong khong cao bang tay bong dien hoa: thuong ph nhiet do cao va doi khi thai nhieu khi doc hai (NO. N02,...). Tay bong hoa hoc va dien hoa duoc dung rong rai de lam bong, dep cho thep khong gi, nhom va hop kim nhom, dong va hop kim dong, ken, monel metal, cac lop ma .... Nhung kinh te nhat la dung cho thep khong gi, nhom va hop kim nhom, hop kim dong. Tay bong hoa hoc va dien hoa co the nang them do bong be mat len 1 -2 cap. De co be mat bong phuong phap co hoc phai bao mon het cac nham vi mo lan vi mo. trong khi tay bong hoa hoc va dien hoa chi can san bang cac nham vi mo la du, tuc la tao duoc do bong ngay tren be mat map mo, khong nhan, phang.