ʻO ka paʻakikī ma kahi a puni ka weld hiki ke kōkua i ka loiloi i ka brittleness o ka weld, a laila e kōkua iā ʻoe e hoʻoholo inā loaʻa ka ikaika i ka weld, no laila ʻo ka weld Vickers hardness testing method he ala e kōkua i ka loiloi i ka maikaʻi o ka weld.
ʻO Shandong Shancai / Laizhou Laihua Testing Instrument Company's Vickers hardness tester hiki ke hana i ka ho'āʻo paʻakikī ma nā'āpana welded a iʻole nā wahi wili.I ka ho'āʻoʻana i ka paʻakikī o kahi helu kuʻi, e hanaʻia nā ana he nui ma kahi mamao mai ka lihi o ka hāpana a iʻole ka piko o ka piko.Ma hope o ka loaʻa ʻana o ka indentation multi-point, hiki ke ana ʻia ka waiwai paʻakikī ma ke ana mau ʻana a hiki ke loaʻa i kahi pakuhi pihi.
I ka hoʻohana ʻana i kahi mea hoʻāʻo paʻakikī Vickers e hoʻāʻo i nā ʻāpana welded, pono e ʻike ʻia nā kūlana hoʻāʻo:
1. Palahalaha o ka la'ana: Ma mua o ka ho'āʻoʻana, wili mākou i ka weld e ho'āʻoʻia e hoʻomaʻemaʻe i konaʻili, me kaʻole o ka'okikene, nā māwae a me nā hemahema'ē aʻe.
2. Ma ka laina waena o ka weld, e lawe i kahi kiko ma ka ʻaoʻao curved i kēlā me kēia 100 mm no ka hoʻāʻo ʻana.
3. ʻO ke koho ʻana i nā pūʻali hoʻāʻo like ʻole e hopena i nā hopena like ʻole, no laila pono mākou e koho i ka ikaika hoʻāʻo kūpono ma mua o ka hoʻāʻo ʻana.
Loaʻa i ka mea hōʻike microhardness nā koi no ka hoʻopau ʻana o ka ʻili o ka hāpana i hoʻāʻo ʻia, pono e hoʻomākaukau pono ʻia e like me ka laʻana metallographic.
ʻO ke kumu hoʻāʻo microhardness i loko o ke ʻano hoʻāʻo microhardness ua like ia me ka paʻakikī Vickers, akā ʻoi aku ka liʻiliʻi o ka ukana i hoʻohana ʻia ma mua o ka paʻakikī Vickers haʻahaʻa haʻahaʻa, ʻoi aku ka liʻiliʻi ma mua o 1000g, a ʻo ka hopena indentation he mau microns wale nō i kahi ʻelua. microns, no laila, hāʻawi ka hōʻike microhardness i kahi ala kūpono loa no ke aʻo ʻana i nā waiwai microstructure o ka papa permeable.Hoʻohana nui ʻia ia e hoʻoholo i ka paʻakikī o kēlā me kēia māhele ma luna o ka ʻili a ma ka papa permeating.
Hōʻike pinepine ʻia ka hōʻailona o ka microhardness e HV, a ua like kona ʻano hoʻoholo a me ke ʻano me ke ʻano paʻakikī Vickers.ʻO ka ʻōnaehana hoʻouka, ʻōnaehana ana a me ka pololei indenter o ka mea hōʻike microhardness ʻoi aku ka koi ma mua o ka mea hōʻike paʻakikī Vickers haʻahaʻa haʻahaʻa.I kēia manawa, hoʻohana nui ʻia ka mea hōʻike microhardness i nā mea hana lahilahi, a no ka mea hiki i ka hoʻonui ke hiki i 400 mau manawa, hoʻohana pinepine ʻia e like me ka microscope metallographic maʻalahi.
Ma ke kaʻina o ka hoʻohana ʻana, pono e nānā i ka ukana, micrometer a me ka indenter o ka microhardness tester, pono e nānā ʻia ma mua o ka hoʻohana ʻana, a hoʻohana ʻia ka poloka paʻakikī no ka ʻike piha ʻana i kona waiwai hōʻike.
Hoʻopili ka mea hōʻike microhardness i ka ukana i ka hana hoʻāʻo e like me ka maʻalahi a me ke ʻano like me ka hiki, me ka ʻole o ka hopena a me ka haʻalulu.I mea e hōʻoiaʻiʻo ai i ka pololei o nā hopena hoʻāʻo, maʻamau pono e ana i nā manawa he nui i nā ʻāpana like ʻole, a ʻike i ka waiwai awelika e hōʻike i ka waiwai paʻakikī o ka papa hoʻāʻo permeability a i ʻole ka pae alloy.No ka papa infiltration i hoʻohana ʻia i ka wela kiʻekiʻe, hiki ke ana ʻia kona paʻakikī me ka hoʻohana ʻana i kahi mea hōʻike microhardness kiʻekiʻe.
Ka manawa hoʻouna: Apr-10-2024
