Résistance ya impact mécanique ya ba réfractaires ezali mingi mingi contrôlés na force de flexion, alors que influence ya toughness ya fracture ezali moke. na maloba mosusu, pona résistance ya impact mécanique, ba réfractaires na makasi ya flexion maximale ezali lolenge ya malamu pona kozua performance ya service ya malamu koleka.
Under the condition of slow crack propagation, the thermal shock resistance of materials is mainly controlled by flexural strength and linear expansion coefficient. E modulus and fracture work The influence of wof is mainly reflected in the parameters. The parameter RST specifies the parameters related to stable fracture. It can be seen from equation 3-20 that the linear expansion coefficient of refractory The smaller the modulus of E and E, the greater Fracture esalaka WOF ya monene, motuya ya RST ya monene, bokeseni ya molunge ya monene oyo esengeli mpo na kopalangana ya fissures, mpe stabilité ya fissures ya malamu koleka.
Bokasi ya flexion mpe ba paramètres ekoki kosalelama mpo na kobongisa résistance ya impact mécanique mpe résistance ya choc thermique ya ba réfractories.
In this way, as long as the flexural strength and parameter center value of refractory can be controlled and optimized, the mechanical impact resistance (crack generation) and thermal shock resistance (crack generation and propagation) of refractory can be optimized. Therefore, the corresponding refractory can adapt to the service conditions discussed above. Therefore, the new parameters in the following formula can be used as the basis for the design of refractory materials:
Lokola bopusi ya bobongisi ya résistance ya choc thermique ya refractaire ezali likolo koleka oyo ya résistance ya impact mécanique, RST esengeli kozala limité.
Na kotalaka na ndenge ya fiziki, etalemi ete ba fissures ya mikuse ekoki kobongisa makasi, nzokande ba fissures milayi ekoki kokitisa rigidité, mpe ba fissures nionso mibale ekoki kosala tension ya likolo mpe fracture. Yango wana, selon cadre ya mécanique ya fracture, esangisi na ba caractéristiques structurelles ya ba réfractories, ba procédés oyo esengeli ekoki ko adopter mpo na kobongisa résistance mécanique ya ba réfractoires ya ba réfractoires}
(1) Biloko oyo ezali na coefficient ya bopanzani ya linéaire to biloko ya liboso oyo ezali na rétrécissement permanent na tango ya kobeta to kosalela esengeli koponama mpo na kokitisa tension thermique.
(2) Na ko optimiser distribution ya particule mpe processus ya fabrication, porosité ya réfractaire ekoki ko réduire mpe force de flexion ekoki kobongisama.
(3) Microstructure ya malamu koleka esalemi mpo na kopekisa bopanzani ya fissures mpe kolia nguya ya bopanzani ya fissures, mpo na kobongisa mecanisme ya fissures, mingi mingi mpo na kobalola fissure mpe ko bifurquer fissures.
(4) In order to turn the crack, it is necessary to use aggregates of all sizes. The use of large-size strong aggregate will also turn the crack and improve the performance of intergranular crack. In the case of transgranular crack characteristics, sintering instead of electrofusion aggregate can improve the crack propagation resistance, which will turn the crack into the aggregate.
(5) Mpo na kolendisa bifurcation ya fissures, conception ya eteni ya matrice ekoki kozala na besoin ya kosalela ba matériaux oyo ezali na ba coefficients ya expansion linéaire ya ndenge na ndenge mpe / to anisotropes mpo na kotombola bokeseni ya expansion thermique, oyo ekoki kosala motango monene ya ba microcracks. Kasi, esengeli koluka équilibre optimal mpo na koboya microcrack coalescence.
