中文版Screw heat treatment concept
1. Hot: Arrives at after the steel products either the steel stock heating above frontier point AC3 or the ACM suitable temperature maintains certain time, in the air cools, obtains the pearlyte class organization's heat treatment craft.
2. Annealing annealing: The hypo-eutectoid steel work piece heating to the AC3 above 20-40 degrees, after keeping warm period of time, along with stove slow cooling (either buries in granulated substance or lime cooling) to 500 degrees below the heat treatment craft which cools in the air
3. Solution heat-treatment: Maintains the alloy heating to the high temperature single-phase zone constant temperature, causes surplus to dissolve fully to the solid solution, then the rapid chilling, by obtains the oversaturation solid solution heat treatment craft
4. Effectiveness: Alloy after solution heat-treatment or cold plasticity deformation, when the room temperature laying aside or is higher than slightly the room temperature maintains, its performance the phenomenon which changes along with the time.
5. Solid solution treatment: Causes in the alloy each kind of full dissolution, the strengthened solid solution and enhances toughness and the corrosion resistance energy, stress-relieving and conditioning, with the aim of continuing to process the formation
6. Aging treatment of metal: The temperature which separates out in the strengthening heats up and keeps warm, causes the strengthening to precipitate the separation, can harden, enhances the intensity
7. Quenching: After steel austenization, cools by the suitable cooling rate, causes the work piece completely or in certain scope has the heat treatment craft which in the lateral section the martensite and so on unstable organizational structure transforms
8. Tempering: Will arrive after the quenching work piece heating below the frontier point AC1 suitable temperature will maintain certain time, afterward uses to conform to request method cooling, obtains the organization which and the performance heat treatment craft needs
9. Steel carbonitriding: The carbonitriding is simultaneously permeates the carbon and the nitrogen process to the steel surface layer. In the custom the carbonitriding is called the cyaniding, at present (i.e. gas tufftride) applies by the warm gas carbonitriding and the low temperature gas carbonitriding is more widespread. The warm gas carbonitriding's main purpose is enhances the steel degree of hardness, the resistance to wear and the fatigue strength. The low temperature gas carbonitriding by azotize primarily, its main purpose is enhances the steel the resistance to wear and the anti-linking.
10. Quenching and retempering treatment quenching and tempering: The general custom will quench adds the heat treatment which the high tempering unifies to be called the quenching and retempering treatment. The quenching and retempering treatment widely applies in each kind of important constructional detail, specially these the connecting rod which, the bolt, the gear works under the alternation load and the axis class and so on. After quenching and retempering treatment, obtains the tempering sorbite organization, its mechanical property compared to same degree of hardness hot sorbite organization for superior. Its degree of hardness is decided by the high tempering temperature and with the steel tempering stability and the work piece section size related, generally between HB200-350.
11. Braze welding: With the solder two kind of work pieces agglutinates in together heat treatment craft
