Introduction Of Heat Therapy Of Steel
Introduction of heat remedy of steel 1, steel annealing The steel is heated to a certain temperature and heat preservation for a time frame, and then make it slowly cooling, referred to as petroleum refinery for the nontechnical person korea anne…
Introduction of heat treatment of steel
1, steel annealing
The steel is heated to a certain temperature and heat preservation for a time period, and then make it slowly cooling, called annealing. Steel annealing is a heat the steel to the phase change or a part of the part change temperature, sluggish cooling after heat preservation heat treatment technique. The aim of annealing is to get rid of tissue defects, enhance the group make composition uniformity and high-quality grains, enhance mechanical properties of the steel, cut back residual stress; Can decrease the hardness at the identical time, enhance the plasticity and toughness, enhance machinability. So earlier than annealing so as to eradicate and improve both the legacy of tissue defects and inner stress, and to arrange for the comply with-up process, so the annealing is belong to the intermediate heat remedy, also called heat remedy prematurely.
2, steel normalizing
Normalizing is heated to above the important temperature of steel, to all into homogeneous austenitic steel, heat therapy and pure cooling in air. It will probably eradicate petroleum refinery for the nontechnical person korea hypereutectoid steel mesh cementite, for hyposteel normalizing can refine crystal lattice, enhance complete mechanical properties, low necessities for the elements use the normalized as an alternative of the annealing course of is more economic.
3, steel quenching
Quenching is the steel is heated to above the critical temperature, heat preservation for a time period, then quickly into the quenching medium, the temperature plummeted, speedy cooling at larger than the critical cooling rate of velocity, which is mainly composed of martensite and unbalanced heat treatment methodology of the organization. Can improve strength and hardness of the steel quenching, but to cut back its plasticity. That is commonly used in quenching hardening agent are: water, oil, caustic soda, and salt resolution, etc.
4, the steel tempering
Can have been reheated quenching of steel to a certain temperature, cooling with a certain technique referred to as tempering. Its objective is to remove the quenching of internal stress, reduce the hardness and brittleness, so as to acquire the specified mechanical Coal Refining Equipment properties. Tempering factors and excessive temperature tempering, the tempering temperature and low temperature tempering. Tempering and hardening, petroleum refinery for the nontechnical person korea normalizing, cooperate to make use of.