Due to its high content of carbon (mass fraction 2.00%~2.30%) and chromium (mass fraction 11.00%~13.00%), Cr12 steel belongs to the type of ledeburite steel, which endows it with excellent hardenability, hardenability, and wear resistance. Small quenching deformation is another characteristic, but it should be noted that if the distribution of carbides is uneven, it may lead to multi-directional and irregular deformation. Therefore, although Cr12 steel has excellent performance, the quality of its microstructure is a key factor determining its final performance.

Cr12material

Cr12 Steel is suitable for the manufacture of cold working dies with complex shape and requiring wear resistance, small deformation and stress, such as silicon steel sheet punching die, thread rolling die and drawing die.

Cr12engine

You don’t want to know. But if you must, it’s not good. There’s usually a lot of noise, and if you’re driving you won’t be for long. You’ll be stranded, and your engine will probably be damaged (metal components can actually break, hence all the noise). How much damage is anyone’s guess. Bottom line? Don’t let this happen.

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In short, the timing belt (or chain) keeps everything in sync by regulating the “timing” of the opening and closing of the valves with the up-and-down motion of the pistons. And with your engine operating at thousands of revolutions per minute, timing is critical, making this continuous loop of rubber or metal a crucial component of your engine.

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Many car owners confuse a serpentine belt with the timing belt, but the two serve different purposes. In a nutshell, a timing belt keeps the camshaft and crankshaft in sync, regulating the “timing” of the opening and closing of the valves with the up-and-down motion of the pistons. It is also concealed from view by a cover that attaches to the engine block.

Secondly, the heat treatment process of Cr12 steel also has an important impact on its properties. Generally speaking, Cr12 steel requires quenching and tempering treatment. Quenching is the process of heating steel above a critical temperature and then rapidly cooling it to form a martensitic structure with carbon and chromium in the steel. Tempering is the process of reheating the quenched steel to a certain temperature and then slowly cooling it to transform the martensitic structure into a tempered sorbite structure. This process can eliminate the stress generated during the quenching process, improve the toughness and stability of the steel.

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Belts themselves aren’t that expensive. The real cost is in the labor, because a lot of parts need to be disassembled to get to the belt. Shopping around to get a few quotes is your best bet to get the best deal, but you can expect to pay anywhere from $367 to $585.

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The cost of replacing your timing belt varies from car to car, even location to location. Smaller passenger cars with smaller engines are generally less expensive than a larger vehicle with a bigger engine. Metropolitan areas usually mean higher costs, too.

If your owner’s manual doesn’t have a recommended schedule, and you suspect something may be wrong, you can have a mechanic do a visual inspection, which includes removing the timing belt cover attached to the engine block. If your mechanic notices that your belt is cracked, frayed or worn down, then it’s time to replace your timing belt.

Finally, the microstructure of Cr12 steel is also an important factor affecting its properties. Due to the high content of carbon and chromium in Cr12 steel, its structure is mainly composed of martensite and carbides. Martensite is a hard and brittle structure that can improve the hardness and strength of steel, but also increase its brittleness. Carbide is a hard and wear-resistant structure that can improve the wear resistance of steel, but also increase its brittleness. Therefore, how to control the distribution and size of carbides is the key to improving the properties of Cr12 steel.

Cr12 steel is an alloy tool steel mainly composed of high carbon and high chromium. During the heat treatment process, Cr12 steel first needs to undergo spheroidizing annealing treatment to eliminate forging stress and improve its cutting performance. Then quenching and tempering are carried out to obtain the required hardness and toughness. The quenching temperature is usually selected between 860 ℃ and 900 ℃, which can ensure the obtaining of a mixed structure of martensite and residual austenite. The tempering temperature is selected between 450 ℃ and 650 ℃ as needed to achieve the required strength and toughness.

Many of today’s timing belts can go 100,000 miles or more without needing to be replaced. In fact, not all cars use a rubber timing belt. Some use a timing chain that can actually outlast the engine.

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Although timing belts are critical, there’s no need to replace them regularly –unless explicitly recommended in your owner’s manual. Some automakers recommend changing a timing belt between 60,000 and 100,000, others don’t.

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Cr12steel

Cr12 Steel is suitable for the manufacture of cold working dies with complex shape and requiring wear resistance, small deformation and stress, such as silicon steel sheet punching die, thread rolling die and drawing die.

Cr12DnD

The main elements of Cr12 steel are carbon and chromium, with carbon content ranging from 2.00% to 2.30% and chromium content ranging from 11.00% to 13.00%. The ratio of these two elements is very important because they determine the hardness and wear resistance of steel. Carbon is a strong hardening element that can improve the hardness and strength of steel, but also increase its brittleness. Chromium is a strengthening element that can improve the hardness and wear resistance of steel, as well as increase its oxidation resistance.

A serpentine belt, on the other hand, is so called because it’s long, snake-like movements transmit mechanical power to several very important engine accessories including the water pump, power steering pump, alternator, air and oil pumps, and the A/C compressor. You can see this belt when you lift the hood of your car.

The question remains: Why do I need to replace my serpentine belt? Because a bad or failing serpentine belt will cause your engine to overheat and eventually stop running. The good news is — as far as engine repairs go — serpentine belts are fairly inexpensive to replace.

A timing belt is a reinforced rubber belt which transfers the engine motion to the camshaft. The camshaft, in turn, operates the cylinder valves. The belt runs on a pulley from the crankshaft to the camshaft. (Quick note: not all cars use a rubber timing belt. Some vehicles use a timing chain.)