N'ihe banyere bọọdụ sekit ndị e biri ebi, anyị enweghị ike ichefu ọrụ dị mkpa nke ihe inyeaka.Ugbu a, ihe a na-ejikarị tin-lead na ọrịre na-enweghị ndu.Kacha ewu ewu bụ 63Sn-37Pb eutectic tin-lead solder, nke bụ ihe kacha mkpa electronic soldering ihe fọrọ nke nta ka ọ bụrụ 100 afọ.
N'ihi ezigbo nguzogide oxidation na ụlọ okpomọkụ, tin bụ metal na-agbaze dị ala nke nwere udidi dị nro, yana ezigbo ductility.Lead abụghị naanị ígwè dị nro nwere ihe ndị nwere kemịkalụ kwụsiri ike, nguzogide oxidation, na nguzogide corrosion, kamakwa ọ nwere ezigbo moldability, na castability, ọ dịkwa mfe ịhazi na ebu.Lead na gbamgbam nwere ezigbo nrụrịta ụka.Ịtinye ụzọ dị iche iche n'ime tin nwere ike ịmepụta ihe dị elu, ọkara, na obere okpomọkụ.Karịsịa, 63Sn-37Pb eutectic solder nwere ọmarịcha eletriki conductivity,, kemịkalụ kwụsie ike,, n'ibu Njirimara na processability, ala agbaze ebe na elu solder nkwonkwo ike, bụ ezigbo ihe maka electronic soldering.Ya mere, tin nwere ike ijikọ ya na lead, silver, bismuth, indium na ihe ọla ndị ọzọ na-emepụta ihe dị elu, ọkara na obere okpomọkụ maka ngwa dị iche iche.
Njirimara anụ ahụ na nke kemịkalụ nke tin
Tin bụ ọla ọcha na-acha ọcha na-acha ọcha nke nwere ezigbo nguzogide oxidation na ụlọ okpomọkụ ma na-ejigide ihe na-egbuke egbuke mgbe ekpughere ya na ikuku: na njupụta nke 7.298 g / cm2 (15) na ebe na-agbaze nke 232, ọ bụ ígwè dị ala na-agbaze. na udidi dị nro na ezigbo ductility.
I. Ihe ngbanwe nke agba agba agba
Ebe mgbanwe agba nke tin bụ 13.2.tin boron ọcha na okpomọkụ dị elu karịa ebe mgbanwe oge;mgbe okpomọkụ dị ala karịa oge mgbanwe mgbanwe, ọ na-amalite ịghọ ntụ ntụ.Mgbe mgbanwe nke usoro ahụ mere, olu ga-abawanye site na 26%.Mgbanwe agba agba dị ala na-eme ka onye na-ere ya na-akụrikụ ma ike ọ fọrọ nke nta ka ọ pụọ.Ọnụego mgbanwe nke usoro na-akacha ngwa ngwa gburugburu -40, na okpomọkụ n'okpuru -50, tin dara dara na-agbanwe ghọọ tin ntụ ntụ ntụ.Ya mere, enweghị ike iji tin dị ọcha mee mgbakọ eletrọnịkị.
II.Njirimara chemical nke tin
1. Tin nwere ezigbo nguzogide corrosion na ikuku, ọ dịghị mfe ịla n'iyi, mmiri adịghị emetụta, oxygen, carbon dioxide.
2. Tin nwere ike iguzogide corrosion nke organic acid ma nwee nnukwu iguzogide ihe ndị na-anọpụ iche.
3. Tin bụ ígwè amphoteric ma nwee ike imeghachi omume na acid siri ike na ntọala, ma ọ nweghị ike iguzogide chlorine, ayodiin, soda caustic na alkali.
Corrosion.Ya mere, maka mbadamba mgbakọ na-eji na gburugburu acidic, alkaline na nnu nnu, a chọrọ mkpuchi mgbochi corrosion ugboro atọ iji chebe nkwonkwo ndị na-ere ahịa.
Enwere uru na ọghọm, ndị a bụ akụkụ abụọ nke mkpụrụ ego ahụ.N'ihi na PCBA n'ichepụta, ọ dị mkpa na-atụle otú ịhọrọ nri tin-lead solder ma ọ bụ ọbụna ndu-free solder dị iche iche ngwaahịa na àgwà akara.
Oge nzipu: Dec-21-2021