Fearas plaisteach
Le forbairt na heolaíochta, tá giaranna athraithe go mall ó ghiaranna miotail go giaranna plaisteacha. Toisc go bhfuil giaranna plaisteacha níos bealaithe agus níos resistant-chaitheamh. Is féidir leis torann a laghdú, costais a laghdú, agus cuimilte a laghdú.
Is iad na hábhair fearas plaisteacha a úsáidtear go coitianta ná: PVC, POM, PTFE, PA, níolón, PEEK, etc.
Fearas carr
There are many steel grades for gears of medium and heavy trucks in my country, mainly to meet the requirements of introducing advanced foreign automobile technology at that time. In the 1950s, my country introduced the production technology of Soviet medium-duty trucks (ie the original "Jiefang" brand) from the former Soviet Union Rikhachev Automobile Plant, and at the same time introduced the 20CrMnTi steel grade of automobile gears produced in the former Soviet Union.
Fearas múnlaithe
Giaranna foirmithe (10 ngrianghraf)
After the reform and opening up, with the rapid development of my country's economic construction, in order to meet the needs of the rapid development of my country's transportation, from the 1980s onwards, my country has introduced various advanced models from industrially developed countries in a planned manner, as well as various advanced foreign medium- and heavy-duty trucks. Freight cars are also being introduced continuously. At the same time, my country's major automobile factories cooperate with famous foreign automobile companies to introduce advanced foreign automobile production technology, including automobile gear production technology. At the same time, the level of my country's steel smelting technology is constantly improving. The use of advanced smelting technologies such as ladle secondary smelting and composition fine-tuning, continuous casting and rolling, enables steel mills to produce gears with high purity and narrowed hardenability bands. The use of steel has realized the localization of imported automobile gear steel, which has brought my country's gear steel production level to a new level. The nickel-containing high-hardenability steel for domestic heavy-duty automobile gears suitable for my country's national conditions has also been applied and achieved good results. The heat treatment technology of automobile gears has also developed from the use of well-type gas carburizing protection in the original 50-60s to the current universal use of continuous gas carburizing automatic lines and box-type multi-purpose furnaces and automatic production lines (including low-pressure (vacuum) carburizing) controlled by computers. Technology), gear carburizing pre-oxidation treatment technology, gear quenching controlled cooling technology (due to the use of special quenching oil and quenching cooling technology), gear forging blank isothermal normalizing technology, etc. The adoption of these technologies not only enables effective control of gear carburizing and quenching distortion, improved gear processing accuracy and extended service life, but also satisfies the mass production needs of modern heat treatment of gears.
Tugann an litríocht ábhartha le fios go ndéantar measúnú ar shaol na bhfearas gluaisteán go príomha ag dhá phríomhtháscairí, is é ceann neart tuirse teagmhála an fhearas, agus is é an ceann eile neart tuirse lúbthachta na bhfearas. Is é an caighdeán carburizing agus múchadh den chuid is mó a chinnfidh an chéad cheann, agus is é an t-ábhar fearas a chinnfidh an dara ceann go príomha. Ar an ábhar seo, is gá tuiscint níos cuimsithí a bheith agat ar riachtanais, ar fheidhmíocht agus ar shaintréithe cóireála teasa cruach carburized le haghaidh giaranna gluaisteán.
