What kind of milling cutters are used in the H13 forgings?
H13 forgings are relatively hard and are usually machined with carbide cutters.Milling cutter type: high speed tool steel milling cutter and carbide cutter.1) (referred to as the high speed tool steel high-speed steel, steel etc.), divided into general and special purpose high speed steel two.It has the following characteristics:A, alloy elements, tungsten, chromium, molybdenum, vanadium content is higher, quenching hardness can reach HRC62 - 70. At 600 degrees of high temperature, still can maintain higher hardness.B, cutting edge strength and toughness, strong vibration resistance, can be used to manufacture cutting speed of the general tool, for the poor steel machine tool, high-speed steel milling cutter, still can smooth cutting.C, the process performance is good, forging, processing and grinding are relatively easy, but also can manufacture more complex shapes of cutting tools.Compared with cemented carbide, D has many disadvantages, such as lower hardness, red hardness and poor wear resistance.2) carbide: metal carbide, tungsten carbide, titanium carbide and cobalt based metal binder, made by powder metallurgy process.Its main features are as follows:A, capable of high temperature, can maintain good cutting performance at 800 - 1000 DEG C, and cutting speed can be 4 to 8 times higher than that of high speed steel.B, high hardness at room temperature, good wear resistance.C, low bending strength, poor impact toughness, the blade is not easy to grind very sharp.
The first thing to know is that H13 is not a general term for thermal modeling, but a kind of hot working die. Equivalent to the domestic 4Cr5MoSiV1.If a cutting tool is used for cutting a forged steel, the appropriate tool shall be selected according to material grade, hardness, and technical requirements of the product.As it is typical of milling cutter, the intermittent cutting, the cutting tool material for milling cutter is 1 important indicators of impact resistance, which is the good performance of the cutter as love ultrafine particles of hard alloy, the wear resistance is another indicator. The former determines the tool stability, and the latter determines the tool life.The residual amount of reaming is very important, because many large machining allowance, material deformation is serious, roundness is not good, or aperture shrinkage; less may appear black phenomenon.
Of course, the alloy is good, but the cost is high, the key is experience