I put it on top of the fire as I am heating up the coal before I turn the blowers on to get it to temp. Quench oil serves two primary functions. I used 81 mm mortar cans with Parks AAA quench oil. Large ammo cans are great for oil quench tanks. It has plentiful volume for all but sword work. I use solid fuel, some real hot burning coal, and by the time I'm ready to quench my oil is nice and warmed up. JavaScript is disabled. For process monitoring and trouble-shooting, the heat treater should develop an historical record, similar to the chart shown in Figure 1, of viscosity variation in his tank. In view of this critical deficiency, GM Quenchometer quench oil characterization is increasingly being replaced by the ISO 9950 or ASTM D6200 cooling curve analysis procedures for quench oils. In this test, a 7/8-inch (22 mm) nickel ball is heated to 885°C (1625°F) and then dropped into a wire basket suspended in a beaker containing 200 milliliters of the quench oil at 21°C to 27°C (70°F to 80°F). The most common laboratory tests for water contamination are either Karl Fischer analysis (ASTM D6304) or distillation (ASTM D95). For example, water may be introduced into the quench oil through a leak in the heat exchanger. The unit is fully OSHA compliant, with an over-temperature alarm system for safety. Sentry Quench Systems are designed to ensure optimum conditions for tool heat-treating applications. America’s oldest steel heat treating furnace maker. The remaining life of an oil can be estimated by comparing the relative propensity of sludge formation in new vs. used oil. Saving up for some parks 50, but it seems to do fine with the 1084 I'm working with.

When water-contaminated oil is heated, a crackling sound may be heard. I heat the oil up by dunking a warm piece of steel in it and checking the oil temp with a thermometer. You must log in or register to reply here. I use solid fuel, some real hot burning coal, and by the time I'm ready to quench my oil is nice and warmed up. One of the most common procedures is induction-coupled plasma spectroscopy (ASTM D4951 or D6595). And it seals right up with the lid when I am done. One of the greatest problems with quench oils is sludge formation. Oil oxidation may also be monitored and detected by infrared spectroscopy. Due to degradation, oil viscosity changes with time. When conducting the open-cup flash point, the relatively low boiling by-products are lost during heating and have less impact on the final value. The precipitation number as defined in ASTM D91 is found by adding naphtha to the oil and determining the precipitate volume after centrifuging. When using quench oil to cool hot metal, a vapor blanket is placed around the hot metal when it is first immersed into the oil. Sentry Company•  62 Main Street • Foxboro, MA 02035, PH: (508) 543-5391 • F: (508) 543-1484 • sentryco@verizon.net, Heat Treating Furnaces, Systems and Accessories, Dual circulator propellers for uniform quenching medium distribution, Over-temperature alarm for OSHA compliance, Optional immersion heater and perforated steel basket. Table 3 provides some illustrative GM Quenchometer times for different quenchants. Viscosity of a Martempering Oil as a Function of Time. Water, because it is not compatible with oil and possesses different physical properties such as viscosity and boiling point, will cause increases in thermal gradients. Figure 2 illustrates the spectral changes that occur from oil degradation. (1993). Vertical quench is best. I'm kind of a new jack to smithing, but, and this may be bad juju- I usually set several (legally obtained) railroad spikes on my fire. Figure 4. I limit the steels I use to oil quenching only. roaster pan works good - so does a 24" long metal drywall mudding trough. The loss of heat-exchanger efficiency can cause overheating, excessive foaming and fires. It should be noted however, that while cooling curve analysis provides an invaluable tool for monitoring and troubleshooting quench oil performance, physical property characterization is still required to identify the causes of the cooling behaviors. Any new knife makers or budding blacksmiths... 44" deep and 5 1/2" diameter, what happens if you drop something in it? The acid number (AN) is the most common method employed. As the ball cools, it passes through the Curie point of nickel (354°C, 670°F), the temperature at which it becomes magnetic. with Cooling Curve Analysis. Water from oil contamination or degradation may cause soft spots, uneven hardness, staining, and worst of all, fires. One of the oldest tests to quantify the quench severity of an oil is the GM Quenchometer (“Nickel Ball”) test which is conducted according to ASTM D3520 (Figure 3). The time required for the nickel ball to cool from 885°C to 354°C (1625°F to 670°F) is recorded. The AN is determined by a titration procedure using potassium hydroxide (KOH) and is reported as milligrams of KOH per gram of sample (mg KOH/g). Although the various analyses above may indicate that a quench oil is usable, the presence of sludge may cause nonuniform heat transfer, increased thermal gradients and increased cracking and distortion. IR Spectra of a New vs. & Clinton, N.A. Best of all it has a lid in case you have a flash up. Figure 6. Traces of low-boiling contaminants may concentrate in the vapor phase resulting in a relatively low value. Sludge is caused by quench oil thermal and oxidative degradation. I have to mention, that I am self learning and really don't know what I'm doing, so if this is a bad idea let me know.

Although the GM Quenchometer has been used to classify quench oils for approximately 40 years, it is of limited value today. The minimum flash point of an oil, under normal operating conditions, should be 90°C (160°F) above the oil temperature being used. Chemical analysis can identify and measure these by-products. I actually feel like I've lost 10 I.Q. Works great for sub 6" blades. Severely Degraded Quench Oil. The relative amount of sludge in quench oil may be quantified by the precipitation number. Heat transfer rates increase with lower viscosities and decrease with increasing viscosity.

The most common open-cup flash point procedure is the “Cleveland Open-Cup” procedure described in ASTM D92.

points for trying it. Bruce is a former fireman, and … You may also choose an optional immersion heater (recommended) and a perforated steel work basket. At this point, the ball is attracted to the magnet, activating a sensor that stops the timer. This setup also increases the cooling surface of the tanks to keep the oil cooler longer. Due to degradation, oil viscosity changes with time. If I quench a large knife or more than one small one wehn I recheck the oil temp it has gotten too warm to do another. Set the dial at whatever and use a cooking thermometer.

Figure 2A. Flash point is the temperature at which the oil, in equilibrium with its vapor, produces a gas that is ignitable but does not continue to burn when exposed to a spark or flame source.

I don't do swords so there's no need for a tall tank like you see in most of the videos. Quench oil characterization is readily performed by measuring a series of physical properties including: viscosity, water content, neutralization number, precipitation number and flash point (Table 1). Moderately Degraded Quench Oil, Figure 2B. Many synthetic oils are non-flamable and make GREAT quenchants for the small shop. IR Spectra of a New vs. Figure 1. I am very fussy about oil temp at quench time. That would be a tough tube and a bear to ship. To assure optimal quench process control, it is necessary to monitor quality variations throughout the oil’s lifetime. Another source of nonuniform heat transfer is quench oil contamination. I have a paint can full of used vegetable/canola/peanut oil that I use. Did you see the weight of that thing? Thanks. Totten, G.E., Bates, C.E. As previously discussed, a quench oil’s quenching performance is dependent on its viscosity. It facilitates hardening of steel by controlling heat transfer during quenching, and it enhances wetting of steel during quenching to minimize the formation of undesirable thermal and transformational gradients which may lead to increased distortion and cracking. I'm using an old turkey frier - and used peanut oil. QUENCH SYSTEMS for Oil or Water. There are numerous specific physical property characterization procedures that may be used when evaluating quench oils. Oil degradation is often accompanied by sludge and varnish formation. Sludge may also plug filters and foul heat-exchanger surfaces. In addition to physical property characterization procedures, cooling curve analysis should also be performed when needed. Viscosity should be monitored periodically at 40°C using ASTM D445. quench tank reservoir. As oil degrades, it forms acidic by- products. The best thing to re purpose into a quench tank is an old electric roster oven. High flash point oils are better than low. The following are examples of testing procedures that may be used and are aimed at providing some insight into the meaning of the results: As previously discussed, a quench oil’s quenching performance is dependent on its viscosity. Sentry Quench Systems are designed to ensure optimum conditions for tool heat-treating applications. Also the issue of not being able to temper just the edge and not the spine. Now, I will address the size of your proposed quench tank: In one instance, during maintenance, the quench tank was emptied prior to cleaning the quench tank.

The impeller forces the oil down the small tank and into the bottom of the quench tank. hbspt.cta.load(3951034, 'c99217f3-09e7-4751-bc3a-7739dac44a0e', {}); Product Unboxing - Hy-Pro Oil Analysis Patch Test Kit, Combining Oil Analysis Tests to Identify the Root Cause of Machine Failures, Case Study: Using Industry 4.0 Techniques for Onsite Oil Analysis, Product Unboxing - The Conserver® Oil Purification Unit, Product Unboxing - AMETEK Spectro Scientific FerroCheck 2100, Advances in the Analysis of New and Used Lubricating Oils by High-Resolution ICP-OES, The Cost Effective Benefits of a High Performance Kidney Loop System, How to Cost Justify a Lubrication Program. Comparison of the GM Quenchometer Test The stability of the vapor layer, and thus the ability of the oil to harden steel, is dependent on the metal’s surface irregularities, oxides present, surface-wetting additives which accelerate the wetting process and destabilize the vapor blanket, and the quench oil’s molecular composition, including the presence of more volatile oil degradation by-products. I use peanut oil. Automated moisture detectors should be used with caution because many of these instruments’ lower sensitivity limits (typically 0.5 percent) are higher than the moisture content allowed for quench oils (typically less than 0.1 percent as described in ASTM D6710). A horseshoe magnet is located outside the beaker as close as possible to the nickel ball.

I prefer the 30mm/rocket cans because they're low to the ground and have a good amount of capacity.

I got mine for 8 bucks at a yard sale but I have seen them in thrift stores.

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