Powder metallurgy hlau-raws li structural qhov chaw yog cov txheej txheem tsim los ntawm cov hmoov metallurgy tshuab nrog hlau hmoov los yog hlau alloy steel hmoov ua cov khoom tseem ceeb.Cov kev xav tau ntawm cov khoom no yog kom muaj cov khoom siv zoo txaus, hnav tsis kam, kev ua haujlwm zoo, thiab qee zaum kub thiab corrosion kuj.Hmoov metallurgy hlau-raws li qhov chaw yog dav siv nyob rau hauv ntau yam kev lag luam ntawm lub teb chaws.Tshwj xeeb tshaj yog nyob rau hauv kev lag luam automotive, 60% mus rau 70% ntawm hmoov metallurgy hlau-raws li qhov chaw nyob rau hauv lub teb chaws tsim yog siv nyob rau hauv tsheb, xws li camshafts, tso valve rooj zaum, dej twj tso kua mis impellers thiab ntau yam zog.

Cov yam ntxwv ntawm cov hmoov hlau metallurgy hlau-raws li cov khoom siv: (1) Cov khoom muaj qhov raug siab, uas tuaj yeem tsawg dua thiab tsis muaj kev txiav;(2) Porosity.Piv nrog cov hlau ntom ntom, hlau-raws li cov hmoov hlau metallurgy qhov chaw muaj qhov sib npaug ntawm qhov pores.Uniformly faib pores tuaj yeem tshem tawm cov roj lubricating los txhim kho cov khoom tiv thaiv kev sib txhuam ntawm cov khoom siv, thiab cov khoom sib txuam sib npaug ntawm cov pores kuj tseem tsim nyog rau kev qaug zog ntawm qhov chaw nyob rau hauv cov xwm txheej ntawm ntau yam cuam tshuam nrog lub zog me me.Txawm li cas los xij, qhov pores tuaj yeem txo cov khoom siv hluav taws xob xws li lub zog tensile, elongation tom qab tawg, thiab cuam tshuam rau lub zog, thiab cuam tshuam rau cov khoom siv corrosion, thermal conductivity, hluav taws xob conductivity, thiab magnetic permeability.Txawm li cas los xij, raws li daim ntawv thov, qhov pore loj thiab pore faib tuaj yeem tswj tau los ntawm kev kho cov khoom muaj pes tsawg leeg, particle loj thiab txheej txheem.Txawm li cas los xij, qhov me me ntawm qhov pore loj, tus nqi tsim khoom ntau dua.(3) Tsis muaj kev sib cais ntawm cov ntsiab lus alloying thiab nplua thiab zoo li siv lead ua nplej.Cov ntsiab lus alloying nyob rau hauv cov ntaub ntawv hlau-raws li cov khoom siv tau pom tau los ntawm kev ntxiv cov hmoov hlau alloying thiab sib tov.Yog tsis muaj smelting, tus naj npawb thiab hom alloying ntsiab ntxiv yuav tsis cuam tshuam los ntawm solubility txwv thiab ceev segregation, thiab segregation-free alloys thiab pseudo-alloys yuav npaj tau.Pores cuam tshuam txoj kev loj hlob ntawm cov nplej, yog li cov nplej ntawm cov hlau-raws li cov khoom siv zoo dua.