a curious case of part contamination in a vacuum furnace

The Space Review: The curious case of the transgressing

The Curious Case of the Transgressing Tardigrades will conclude in Part Two next week, where we will delve deeper into US regulation of private space payloads like Beresheet, discuss whether regulatory gaps exist, and whether enforcement should be tightened.

STUDY OF ALPHA CASE FORMATION ON HEAT TREATED TI

in graphite-insulated furnace that had oxygen contamination. Table 1 — Test cycle conditions and test results Pump down, Ramp up, Alpha Test Furnace conditions torr F/h Surface condition case 1 All metal Mo hot zone 710-5 300 Slight discolor (lt. gray -4

High Precision 14C Analysis in Small Seawater Samples

For the Cu furnace, "old" refers to the built-in furnace of the Elemental Analyzer, "new" refers to the self-made furnace. Initial Experimental Setup The initial experimental setup consisted in applying the method used in groundwater samples (Molnr et al. Reference Molnr, Hajdas, Janovics, Rinyu, Synal, Veres and Wacker 2013 ) to seawater samples (Figure 1, without Cu-Ag furnace).

STUDY OF ALPHA CASE FORMATION ON HEAT TREATED TI

in graphite-insulated furnace that had oxygen contamination. Table 1 — Test cycle conditions and test results Pump down, Ramp up, Alpha Test Furnace conditions torr F/h Surface condition case 1 All metal Mo hot zone 710-5 300 Slight discolor (lt. gray -4

Next Generation Transparent Furnace

The furnace performs as a high vacuum furnace, where at all temperatures heat transfer occurs as a result of heat radiation (not by convection) rather than just at high temperature. This changes the design of multizone furnaces, and necessitates a careful assessment of the radiant absorption characteristics of the load to determine its thermal response to furnace control.

Case Studies

First, the valve must routinely tolerate the contamination that's routinely found in the untreated water – everything from unfiltered fish scales and plant matter to pebbles and mud. Second, the valve must provide an accurately timed water jet slaved to a process control system and pre-determined discrete cleaning patterns.

Selecting the Best Carburizing Method for the Heat Treatment of

and finish requirements. Case depths typically are specified in wide ranges (e.g. 0.030 to 0.050 in. (0.75 to 1.25 mm) to compensate for cycle induced variability. Case depth quality issues; the best part of the case often is lost due to the amount of

Furnace Atmosphere Control Methods (Part 1)

2018/6/12Whether neutral or case hardening, annealing or normalizing, a number of variables determine how well a furnace does its job. Throughout the entire cycle it is critical to the process that we control the percentage of carbon dioxide, oxygen and water vapor as well as the ratio of enriching gas (or air) to carrier gas.

Furnace Brazing Copper in Hydrogen Gas

2019/12/13Furnace brazing in hydrogen gas is the best method to braze copper to itself or to other metals like stainless steel for accuracy, joint-strength, and high-vacuum applications. It always results in a clean and beautiful part because the hydrogen gas helps reduce oxides, removes hydrocarbon contamination and improves the capillary action (wicking) of the filler into the joint.

PROCESSI Hyper baric carburising process

vacuum furnace, is too slow, also if it's made with high pressure or blending of same expensive gas like He. In this case the toughness is lower than the quenching in oil. (See the bibliography 3) by Fernando Da Costan just quoted). SOLID-GAS PHASES

THE EFFECTS OF CONTAMINATION AND CLEANING ON AISI 9310 VACUUM CARBURIZED STEEL

study examined the effects of contamination on the appearance, hardness, carbon concentration, and retained austenite percentages in vacuum carburized AISI 9310 steel. The effectiveness of commonly-used cleaning methods was also determined. Seven

Top 3 Discolouration of Metal Parts Often Encountered

2016/9/30The green tinge in a just-finished metal part is likely the result of atmospheric contamination. A negative atmosphere eliminates such cross-contaminating defects. Likewise, excess quantities of evaporated water in the furnace can cause an unwanted surface reaction.

Source and Transport Mechanism of Exogenous Inclusions in Vacuum Poured Ingots: Part

• In a vacuum induction furnace at RD, about 45 Kg of pure electrolytic Fe was melted and the heat was deoxidized using Si-Mn alloy (Si ~ 30%). Alloys were added after 10 minutes of deoxidation and after another 15 minutes, about 0.5 lbs of pony scum

Maintenance Procedures for Vacuum Furnaces

2012/10/29However, successful use of a vacuum furnace depends on the purity and reliability of its vacuum. Additional maintenance activities are required to ensure good vacuum levels in the system. Leaks in joints and contamination of furnace internals will greatly affect operating vacuum levels and the quality of the processing.

PROCESSI Hyper baric carburising process

vacuum furnace, is too slow, also if it's made with high pressure or blending of same expensive gas like He. In this case the toughness is lower than the quenching in oil. (See the bibliography 3) by Fernando Da Costan just quoted). SOLID-GAS PHASES

New Patent Announcement: Innovative Vacuum Gas

This is a significant improvement over standard vacuum furnaces which have slower cycles, or in the case of brass, that can cause contamination. Souderton, PA (PRWEB) January 09, 2012 Solar Atmospheres announced today that The U.S. Patent and Trademark Office has issued U.S. Patent No. 8,088,328 covering Solar's new vacuum gas nitriding furnace design.

New Patent Announcement: Innovative Vacuum Gas

This is a significant improvement over standard vacuum furnaces which have slower cycles, or in the case of brass, that can cause contamination. Souderton, PA (PRWEB) January 09, 2012 Solar Atmospheres announced today that The U.S. Patent and Trademark Office has issued U.S. Patent No. 8,088,328 covering Solar's new vacuum gas nitriding furnace design.

A Few Do's and Don'ts of Hot Zone Maintenance

2016/7/21An important part of maintaining your heat treatment equipment – and in this specific instance, hot zone maintenance – is not only knowing when and how to perform maintenance, but also understanding the why behind different do's and don'ts. A portion of hot

Rotary Retort Furnace Systems

Rotary Retort Furnace Systems Continuous Heat Treating of Small Parts SECO/WARWICK's rotary retort furnaces are specifically designed for continuous production and uniform heat treating of small parts, such as coins, small hardware, nails, bearings, chain components, and fasteners, such as nuts, bolts, and screws.

Vacuum Furnace Problems

2012/4/27Re: Vacuum Furnace Problems 04/20/2012 2:38 AM We once had a problem with an analyzer that we use to measure product quality, and after several days of trouble shooting we changed our nitrogen sample gas.. the problem vanished.. we had been supplied with a N2 gas that was less than 99,5% n2.. thus it had a high content of o2, which was causing havoc with our analyzer.. check to see

Vacuum Chamber

The exit window as a part of the vacuum chamber is kept at ground potential. The accelerated electrons penetrate the thin titanium window and enter the process zone. A linear cathode processor using a single filament has a dose-speed capacity of about 450 m/min (1500 ft/min) at 10 kGy.

Vacuum Heat Treating Archives

Recently, I was asked to give a vacuum heat treating presentation to a group of design engineers at a large medical device company. The lead engineer asked if I would help educate his team on this subject primarily because they had just experienced a major failure caused by improper heat treatment.

Vacuum Furnace Problems

2012/4/27Re: Vacuum Furnace Problems 04/20/2012 2:38 AM We once had a problem with an analyzer that we use to measure product quality, and after several days of trouble shooting we changed our nitrogen sample gas.. the problem vanished.. we had been supplied with a N2 gas that was less than 99,5% n2.. thus it had a high content of o2, which was causing havoc with our analyzer.. check to see

Technology

It is recommended that a suitable conventional precleaning is applied before plasma treatment in case of high surface contamination on the substrate material. Plasma process can instigate chemical reaction on the wire surface, providing that the right choice of processing gas and process parameters is used.

Vacuum Heat Treatment

Vacuum heat treatment and vacuum heat treating services offer a number of benefits for both the appearance as well as the overall structure of metal. At Specialty Steel Treating, we offer a wide range of specialized steel heat treatment options for your industrial material needs.

Vacuum Heat Treating and Its Material Advantages

2020/8/31The vacuum furnace can readily get rid of the oxides and any free oxygen formed during the whole heating process. Maintains High Thermal Efficiency The whole process of vacuum heat treatment has high thermal efficiency, which is very helpful in maintaining the stability and repeatability of the metal from being processed.

vacuum furnace : definition of vacuum furnace and

Definitions of vacuum furnace, synonyms, antonyms, derivatives of vacuum furnace, analogical dictionary of vacuum furnace (English) A vacuum furnace is a type of furnace that can heat materials, typically metals, to very high temperatures and carry out processes such as brazing, sintering and heat treatment with high consistency and low contamination.

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